Weston Solutions, Inc.

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1 Weston Solutions, Inc. 360 E. Maple, Suite R Troy, Michigan Phone: Fax: December 6, 2010 Ms. Mary P. Logan Remedial Project Manager Superfund Division United States Environmental Protection Agency 77 West Jackson, SR-6J Chicago, IL Re: Midland/Saginaw/Bay (MSB) City Water Supply Sampling Letter Report Second Round of Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan Technical Direction Document No.: S Document Control No.: 689-2A-AIEM Work Order No.: Dear Ms. Logan: In July 2009, the United States Environmental Protection Agency (U.S. EPA) tasked the Weston Solutions, Inc. (WESTON ), Superfund Technical Assessment and Response Team (START) to conduct water sampling at three municipal water supply facilities (Facilities) located in Arenac, Midland, Saginaw, and Bay Counties in Michigan because of stakeholder concerns about potential re-suspension of contaminants from navigational dredging into the public drinking water supply. On July 28, and 29, 2009, WESTON START mobilized to the Facilities to conduct baseline water sampling (first round of sampling). This sampling was conducted to establish a baseline against which to compare data collected during dredging activities in the Saginaw River. At the time of baseline sampling, dredging activities had been suspended for over 2 weeks. Results of the second round of sampling indicate there was no difference in the water quality while dredging occurred when compared to the baseline round of sampling. These findings are discussed further below. Major findings from the baseline water sampling were reported in the Midland/Saginaw/Bay (MSB) City Water Supply Sampling Letter Report (WESTON, October 2009) ( sampling report.pdf); and included: I:\WO\START3\689\42396LRPT.DOC 689-2A-AIEM This document was prepared by Weston Solutions, Inc., expressly for U.S. EPA. It shall not be released or disclosed in whole or in part without the express written consent of U.S. EPA.

2 Ms. Mary Logan MSB City Water Supply Sampling U.S. EPA -2- December 6, 2010 More than 180 compounds were analyzed for in each sample. Most compounds were not detected in any sample. Sample results were compared to the U.S. EPA National Primary Drinking Water Regulations Maximum Contaminant Levels (MCLs) established under the Safe Drinking Water Act. No contaminants were detected at concentrations exceeding the MCLs. A variety of other organic and inorganic contaminants were detected in all samples at low levels. Because MCLs are not established for all contaminants, sample results also were compared to Michigan s Part 201 Residential and Commercial 1 Drinking Water Criteria (Part 201 Criteria). Although the Part 201 Criteria are applicable to groundwater, these benchmarks were evaluated. None of these detected compounds exceeded the Part 201 Criteria. As discussed in the October, 2009 report, laboratory contamination associated with the furan fraction of the sample results rendered the results unusable. Therefore, re-sampling at the Facilities was conducted on October 8, 2009 to obtain representative dioxin/furan results. Review and validation of the October 8, 2009, sample results indicated that all samples (including the laboratory and equipment blanks) were free of laboratory contamination, and no dioxin or furan congeners were detected in any of the eight investigative samples collected. The updated dioxin/furan results were reported in the Midland/Saginaw/Bay (MSB) City Water Supply Sampling Letter Report Addendum (WESTON, November, 2009) ( samplingaddendum.pdf). WESTON returned to the Facilities to conduct the second round of sampling while navigational dredging occurred on May 26 and 27, The second round of sampling occurred at least five days after dredging had resumed. Major findings from the second round of sampling include the following: More than 180 compounds were analyzed for in each sample. Most compounds were not detected in any sample. Sample results were compared to the U.S. EPA MCLs established under the Safe Drinking Water Act. No contaminants were detected at concentrations exceeding the MCLs. Because MCLs are not established for all contaminants, sample results also were compared to Michigan s Part 201 Residential and Commercial 1 Drinking Water Criteria (Part 201 Criteria). Although the Part 201 Criteria are applicable to groundwater, these benchmarks were evaluated. None of these detected compounds exceeded the Part 201 Criteria. A variety of other organic and inorganic contaminants were detected in all samples at low levels. I:\WO\START3\689\42396LRPT.DOC 689-2A-AIEM This document was prepared by Weston Solutions, Inc., expressly for U.S. EPA. It shall not be released or disclosed in whole or in part without the express written consent of U.S. EPA.

3 Ms. Mary Logan MSB City Water Supply Sampling U.S. EPA -3- December 6, 2010 Results of the second round of sampling indicate there was no difference in the water quality while dredging occurred when compared to the baseline round of sampling. This letter report discusses the project background, sampling activities, analytical results, and conclusions. Attachment A provides a figure showing the Facility locations. Attachment B provides the analytical result summary tables from the July and October 2009 baseline sampling. Attachment C provides the analytical result summary tables from the May 2010 second round of sampling. Attachment D provides the analytical data and associated data validation reports. PROJECT BACKGROUND The project background, and facility locations and operations are summarized below. Contaminant Background In recent years, removal activities have been conducted upstream from Saginaw Bay in the Tittabawassee and Saginaw Rivers under U.S. EPA s Superfund authority to address historical dioxin and furan contamination originating from The Dow Chemical Corporation in Midland, Michigan (Dow Plant). Environmental investigations have revealed that dioxin- and furancontaminated sediments have migrated off-site and that contaminated river sediments extend over 50 miles downstream of the Dow Plant through the Tittabawassee and Saginaw Rivers and into Saginaw Bay. Dioxins and furans are the principal contaminants of interest in the river system, but other contaminants also are of concern. Contaminant concentrations are generally lower in the Saginaw River and Saginaw Bay than in the Tittabawassee River. Additionally, other facilities operating along the Saginaw River have, or may have contributed to the overall contaminant concentrations in the river system. Project Objective Some stakeholders expressed concerns that the dredging could re-suspend contaminated sediments and contaminants might get into the public drinking water supply. The objective of the water supply sampling is to assess the impact, if any, as a result of the United States Army Corps of Engineers (USACE) dredging activities on drinking water supplies due to the potential mobilization of contaminated sediment. U.S. EPA tasked WESTON START to perform sampling at the Facilities in order to determine if contaminants are entering drinking water supplies during dredging activities. The first round of sampling took place after the dredging had been completed for Samples were collected days after the USACE had completed dredging. The first round of samples provided a baseline of water quality believed to be unaffected by the dredging activities. The first round of sampling also included subsequent re-sampling of the dioxin/furan fraction of water in October 2009 due to laboratory contamination observed during the initial sample collection in July The second round of sampling was conducted at least five days after USACE dredging had I:\WO\START3\689\42396LRPT.DOC 689-2A-AIEM This document was prepared by Weston Solutions, Inc., expressly for U.S. EPA. It shall not be released or disclosed in whole or in part without the express written consent of U.S. EPA.

4 Ms. Mary Logan MSB City Water Supply Sampling U.S. EPA -4- December 6, 2010 resumed in May The results of the 2009 and 2010 sampling events were compared to evaluate if any water quality changes occurred as a result of dredging. Dredging Background In May 2009, the USACE began navigational dredging in the Saginaw River. Dredging occurred between May 11 and July 9, USACE removed 195,556 cubic yards of sediment from the navigation channel in the Saginaw River. USACE resumed dredging in May 17, 2010 and completed dredging on June 23, USACE removed 68,277 cubic yards of sediment from the navigation channel in the Saginaw River. Drinking Water Supply Background The Safe Drinking Water Act was established to protect the quality of drinking water in the U.S. This law focuses on all waters actually or potentially designed for drinking use, whether from above ground or underground sources. The law authorizes U.S. EPA to establish minimum standards to protect tap water and requires all owners or operators of public water systems, including the Facilities, to comply with these primary, health-related standards. State governments can be approved to implement these rules for U.S. EPA. In order to meet the drinking water standards, many water treatment facilities follow some basic steps, including the following: intake screening to keep out fish and large debris; settling out of solids; and chemical treatment for purification and disinfection. This treatment ensures that the water that people drink is clean and safe. Each Facility is required to monitor and report on the quality of water supplied to its users. Facility Locations The three Facilities are located in Midland, Saginaw, and Bay City, Michigan, and provide drinking water to the Midland, Saginaw, and Bay City regions (see Figure 1 in Attachment A). The Midland Facility is located at 2607 Bay City Road in Midland, Michigan, in a mixed commercial and residential area. The Midland Facility occupies approximately acres, with a wastewater treatment facility to the west and a park to the east. The Saginaw Facility is located at 522 Ezra Rust Drive in Saginaw, Michigan, in a mixed commercial residential area. The Saginaw Facility occupies approximately 54 acres, with the Saginaw River to the west and residential and city properties to the south and east. Ojibway Island and Linton Lake are north of the Saginaw Facility. Both the Midland and Saginaw Facilities draw water into their systems through the Whitestone Point Intake Facility located at 720 North Huron Road in Au Gres, Michigan. The Whitestone Point Intake is operated by the Saginaw-Midland Municipal Water Supply Corporation (SMMWSC). I:\WO\START3\689\42396LRPT.DOC 689-2A-AIEM This document was prepared by Weston Solutions, Inc., expressly for U.S. EPA. It shall not be released or disclosed in whole or in part without the express written consent of U.S. EPA.

5 Ms. Mary Logan MSB City Water Supply Sampling U.S. EPA -5- December 6, 2010 The Bay City Facility is located at 2691 North Euclid Road in Bay City, Michigan, in a rural residential area. The Bay City Facility occupies approximately acres, with residential properties to the west and south and a state park to the northeast. Facility Operations The SMMWSC was organized in 1946, is jointly owned and operated by the Cities of Midland and Saginaw, and has supplied potable water from Lake Huron since Water is drawn into the system through two intake structures located at the SMMWSC Whitestone Point Intake Facility. A 72-inch-diameter intake is located 1 mile offshore, and a second 66-inch-diameter intake (primary) is located 2 miles offshore approximately 53 feet beneath the water surface. The two intakes transport water though 65 miles of pipeline to the Midland and Saginaw Facilities to provide 230 million gallons per day of available capacity to the Midland and Saginaw Facilities. The City of Midland owns and operates the Midland Facility, and source water is supplied through the SMMWSC intake. The Midland Facility provides a capacity of 48 million gallons of treated water per day to Midland area customers. In addition, a 110-million-gallon source water reservoir located north of the Midland Facility is used for flow equalization and emergency supply. The most recent report of the Midland Facility s water quality can be found at The City of Saginaw owns and operates the Saginaw Facility, and source water also is obtained from SMMWSC through the Whitestone Point intakes described above. The Saginaw Facility provides a capacity of 53 million gallons of treated water per day to Saginaw Valley customers. The most recent report of the Saginaw Facility s water quality can be found at The Bay City Facility was built in 1979 and is owned and operated by the City of Bay City. Water is supplied to the facility through two 48-inch-diameter intakes within Saginaw Bay. The primary intake, installed in 1954, is located approximately 4 miles offshore, and the secondary intake, installed in 1922, is located approximately 0.75 mile offshore. The Bay City Facility provides 40 million gallons of treated water per day to Bay County customers. The most recent report of the Bay City Facility s water quality can be found at SAMPLING ACTIVITIES U.S. EPA directed WESTON START to collect water supply samples for laboratory analysis on May 26 and 27, WESTON START collected samples in accordance with the WESTON Field Sampling Plan for Midland/Saginaw/Bay City Water Supply Sampling (FSP) dated July 2009 except as discussed below. I:\WO\START3\689\42396LRPT.DOC 689-2A-AIEM This document was prepared by Weston Solutions, Inc., expressly for U.S. EPA. It shall not be released or disclosed in whole or in part without the express written consent of U.S. EPA.

6 Ms. Mary Logan MSB City Water Supply Sampling U.S. EPA -6- December 6, 2010 WESTON START collected both pre- and post-treatment samples from each Facility. The pretreatment samples for the Midland and Saginaw Facilities were collected from the Whitestone Point Intake Facility because it provides the most representative raw (untreated) water for Midland and Saginaw. WESTON START collected samples from sampling ports located in each Facility s laboratory where routine compliance samples of raw and treated water typically are collected. Before sample collection, WESTON START adjusted the flow rate of each sampling port to approximately 500 milliliters per minute or less. WESTON START collected one water quality measurement from each location prior to collecting the samples for laboratory analyses (including ph, conductance, temperature, and turbidity). WESTON START collected water samples into the appropriately preserved, laboratory-supplied containers. Two samples, one filtered and one unfiltered, of the raw water from the Whitestone Point Intake and Bay City Facilities, were collected to determine if any difference in analytical results occurred as a result of reducing or removing suspended particles from the raw water samples. Filtered samples passed through dedicated disposable tubing and a 0.45-micron in-line filter before collection into the sample bottles. Consistent with the July 2009 baseline sampling event, the 0.45-micron filter was used instead of the 0.1-micron filter proposed in the FSP because the smaller filter was creating noticeable back-pressure on the connecting tubing and not allowing water to flow at a reasonable rate. The table below lists the sample identifier, sampling location, and analyses conducted for each sample. For quality assurance/quality control, WESTON START collected one field duplicate sample. WESTON START also collected one equipment blank by passing de-ionized water through unused disposable tubing and in-line filter to determine if contaminants were detected as a result of the equipment used for filtered samples. Trip blanks accompanied each cooler containing samples selected for volatile organic compound (VOC) analysis. Sample Identifier MSB-WSP-PRE-UNF MSB-WSP-PRE-UNF D (duplicate sample) MSB-WSP-PRE-FIL Pre- or Post- Treatment Pre- Pre- Pre- Filtered or Unfiltered Sample Unfiltered Unfiltered Filtered Sampling Location Whitestone Point Intake Facility Raw Water Sampling Port Whitestone Point Intake Facility Raw Water Sampling Port Whitestone Point Intake Facility Raw Water Sampling Port Analyses Conducted Dioxins/Furans, TCL VOCs, TCL SVOCs, TCL PCBs, TCL Pesticides, TAL Metals, TSS Dioxin/Furans, TCL VOCs, TCL SVOCs, TCL PCBs, TCL Pesticides, TAL Metals, TSS Dioxins/Furans, TCL SVOCs, TCL PCBs, TCL Pesticides, TAL Metals I:\WO\START3\689\42396LRPT.DOC 689-2A-AIEM This document was prepared by Weston Solutions, Inc., expressly for U.S. EPA. It shall not be released or disclosed in whole or in part without the express written consent of U.S. EPA.

7 Ms. Mary Logan MSB City Water Supply Sampling U.S. EPA -7- December 6, 2010 Sample Identifier MSB-BAY-PRE- UNF MSB-BAY-PRE-FIL MSB-BAY-POS- UNF MSB-SAG-POS-UNF MSB-MID-POS-UNF MSB-EQUIPMENT- FIL Pre- or Post- Treatment Pre- Pre- Post- Post- Post- Not Applicable Notes: PCB Polychlorinated biphenyl SVOC Semivolatile organic compound TAL Target Analyte List Filtered or Unfiltered Sample Unfiltered Filtered Unfiltered Unfiltered Unfiltered Filtered Sampling Location Bay City Facility Raw Water Sampling Port Bay City Facility Raw Water Sampling Port Bay City Facility Treated Water Sampling Port Saginaw Facility Treated Water Sampling Port Midland Facility Treated Water Sampling Port Equipment Blank TCL Target Compound List TSS Total suspended solids VOC Volatile organic compound Analyses Conducted Dioxins/Furans, TCL VOCs, TCL SVOCs, TCL PCBs, TCL Pesticides, TAL Metals, TSS Dioxins/Furans, TCL SVOCs, TCL PCBs, TCL Pesticides, TAL Metals Dioxins/Furans, TCL VOCs, TCL SVOCs, TCL PCBs, TCL Pesticides, TAL Metals Dioxins/Furans, TCL VOCs, TCL SVOCs, TCL PCBs, TCL Pesticides, TAL Metals Dioxins/Furans, TCL VOCs, TCL SVOCs, TCL PCBs, TCL Pesticides, TAL Metals Dioxins/Furans, TCL SVOCs, TCL PCBs, TCL Pesticides, TAL Metals All samples were labeled and placed on ice immediately after collection and were accompanied by chain-of-custody records to the respective laboratories. The sample fractions collected for dioxin/furan analysis were shipped using overnight delivery service to SGS North America, Inc., in Wilmington North Carolina. All other sample fractions were transported to TriMatrix Laboratory (TriMatrix) in Grand Rapids, Michigan, using the TriMatrix courier. The samples were analyzed under Analytical Technical Direction Document No. S ANALYTICAL RESULTS The tables in Attachment B summarize analytical results for the 2009 baseline water supply sampling event and have been included in this report for comparison. The tables in Attachment C summarize analytical results for the 2010 second round of water supply sampling. Attachment D provides the analytical data and data validation reports for the second round of sampling. The summary tables provide pre- and post-treatment sample results for each Facility to allow side-by-side comparison. The tables in Attachment C are organized as follows: I:\WO\START3\689\42396LRPT.DOC 689-2A-AIEM This document was prepared by Weston Solutions, Inc., expressly for U.S. EPA. It shall not be released or disclosed in whole or in part without the express written consent of U.S. EPA.

8 Ms. Mary Logan MSB City Water Supply Sampling U.S. EPA -8- December 6, 2010 Tables 1-1 and 2-1: Metals and total suspended solids (TSS) results Tables 1-2 and 2-2: Pesticides and polychlorinated biphenyl (PCB) results Tables 1-3 and 2-3: VOC results Tables 1-4 and 2-4: Semivolatile organic compound (SVOC) results Table 1-5 and 2-5: Dioxin and furan results Tables 3-1 through 3-5: Equipment and trip blank results Table 4: Facility water quality report results compared to May 2010 post-treatment sample results More than 180 compounds were analyzed for in each sample. Most compounds were not detected in any sample. However, a variety of organic and inorganic contaminants were detected in all samples at low levels. Detection limits for contaminants of concern were established for this sampling event at low levels, to ensure that the results could be compared against healthbased standards. The results for most detected contaminants are considered estimated because they were detected below the respective laboratory reporting limit. Several compounds detected in the samples are naturally occurring in surface water. Several chemicals detected in the posttreatment samples are associated with the chlorination treatment processes, including chloroform, bromodichloromethane, dibromochloromethane, and bromoform; and are referred to as the trihalomethanes. Raw water samples were analyzed as both filtered and unfiltered samples to see if any detected contaminants were associated with solid particles suspended in the water. Filtration removes the solids, so only dissolved contaminants remain in the sample. This is of interest because compounds such as dioxins and furans tend to stick to particles of dirt or sediment, rather than dissolve into the water. Therefore, if dioxins or furans were present, the unfiltered sample would be expected to show higher levels. Analytical results for pre-treatment filtered and unfiltered samples indicate little if any difference in the overall analytical results from the filtration of raw water. Sample results were compared to the U.S. EPA National Primary Drinking Water Regulations MCLs established under the Safe Drinking Water Act. However, MCLs are not published for every chemical analyzed during the sampling events. The State of Michigan applies the same standards to drinking water and Facilities within Michigan. Because MCLs are not established for many of the contaminants analyzed for, sample results also were compared to Michigan Department of Natural Resources and Environment (MDNRE) Part 201 Residential and Commercial 1 Drinking Water Criteria (Part 201 Criteria). Although the Part 201 Criteria are applicable to groundwater, START considered these benchmarks as they are protective of a source of water used for human consumption. In some cases, no values are available for comparison between the standards discussed above. I:\WO\START3\689\42396LRPT.DOC 689-2A-AIEM This document was prepared by Weston Solutions, Inc., expressly for U.S. EPA. It shall not be released or disclosed in whole or in part without the express written consent of U.S. EPA.

9 Ms. Mary Logan MSB City Water Supply Sampling U.S. EPA -9- December 6, 2010 The May 2010 sampling results also were compared to analytical results from the most recent water quality reports for each Facility to further evaluate the baseline data. The comparison of sample results to the MCLs and water quality report results are discussed below. MCLs No contaminants were detected above the federal MCLs. As discussed above, MCLs are legally enforceable, health-based standards established to protect drinking water and its users. The reporting limits for two contaminants, 1,2-dibromo-3-chloropropane and toxaphene, exceeded their respective MCLs. However, these chemicals were undetected in all of the samples. MDNRE Part 201 Criteria As discussed above, because MCLs are not established for all of the contaminants analyzed for, sample results also were compared to Part 201 Criteria. There were no contaminants detected above MDNRE Part 201 Criteria. Inorganics Each of the Facilities uses surface water from Saginaw Bay or Lake Huron as its source of raw water. As water travels over the surface of the land, it dissolves naturally-occurring minerals, and can pick up substances resulting from human activity. Inorganic constituents, such as salts and metals, are commonly detected in surface water. Table 1-1 and 2-1 show the inorganic constituents detected in the samples from the Midland and Saginaw Facilities, and the Bay City Facility, respectively. As noted above, none of the inorganic constituents was detected at a level above the MCL. Dioxins/Furans Each sample was analyzed for the 17 dioxin/furan congeners considered by the World Health Organization (WHO) to be toxic to human health. None of the 17 WHO dioxin/furan congeners were detected in any sample. Other Organics Trihalomethanes are typically detected in treated drinking water. The chemicals are a result of the disinfection process. Treated water from each of the Facilities contained detectable levels of trihalomethanes. A few of the samples also had very low, estimated detections of organic chemicals or pesticides. These compounds could be a result of runoff or other sources. None of these organic compounds was detected in all of the samples, and there does not seem to be a pattern of widespread I:\WO\START3\689\42396LRPT.DOC 689-2A-AIEM This document was prepared by Weston Solutions, Inc., expressly for U.S. EPA. It shall not be released or disclosed in whole or in part without the express written consent of U.S. EPA.

10 Ms. Mary Logan MSB City Water Supply Sampling U.S. EPA -10- December 6, 2010 distribution of any contaminant. None of these organic compounds was found above its relevant MCL. 2009/2010 Water Quality Report Results The analytical results for May 2010 post-treatment samples are comparable to results in the most recent water quality reports for each Facility for the contaminants analyzed. The Bay City water quality report indicates the highest running annual average for trihalomethanes was above the MCL. No other contaminants were detected above the MCLs in the water quality report samples or the May 2010 sampling results for any of the three Facilities. CONCLUSIONS The conclusions summarized below are based on the May 2010 water supply sampling results. More than 180 compounds were analyzed for in each sample. Most compounds were not detected in any sample. Second round sampling results indicate no difference in water quality during dredging compared to the baseline sampling results. Sample results were compared to the U.S. EPA National Primary Drinking Water Regulations MCLs established under the Safe Drinking Water Act. No contaminants were detected at concentrations exceeding the MCLs. A variety of other organic and inorganic contaminants were detected in all samples at low levels. Analytical results for pre-treatment filtered and unfiltered samples indicate little, if any, difference in the overall analytical results from the filtration of raw water. If you have any questions regarding this report, please contact me at (248) Very truly yours, WESTON SOLUTIONS, INC. Attachments A - Figure B Data Summary Tables Alexandra Clark WESTON START Project Manager I:\WO\START3\689\42396LRPT.DOC 689-2A-AIEM This document was prepared by Weston Solutions, Inc., expressly for U.S. EPA. It shall not be released or disclosed in whole or in part without the express written consent of U.S. EPA.

11 Ms. Mary Logan MSB City Water Supply Sampling U.S. EPA -11- December 6, 2010 C Data Summary Tables D - Analytical Data and Data Validation Reports cc: WESTON START DCN File I:\WO\START3\689\42396LRPT.DOC 689-2A-AIEM This document was prepared by Weston Solutions, Inc., expressly for U.S. EPA. It shall not be released or disclosed in whole or in part without the express written consent of U.S. EPA.

12 ATTACHMENT A FIGURE

13 !H Whitestone Production Facility!H Bay City WSF!H Midland WSF!H Saginaw WSF Arenac, Bay, Midland, and Saginaw Counties Base Map Source: The Michigan Geographic Data Library WSF = Water Supply Facility Miles Figure 1 Prepared for: U.S. EPA REGION V Contract No: EP-S TDD No.: S DCN: 689-2A-AIEM Prepared by: WESTON SOLUTIONS, INC. 360 E. Maple Road, Suite R Troy, MI File: D:\GIS_Projects\START\Midland_Saginaw_Dioxin\mxds\workplan\Fig 1 Facilities Location Map revb.mxd, 23-Nov-10 15:37, BROWNK FACILITIES LOCATION MAP ARENAC, BAY, MIDLAND, AND SAGINAW COUNTIES, MICHIGAN NOVEMBER 2010

14 ATTACHMENT B 2009 DATA SUMMARY TABLES

15 Table 1-1 Analytical Results Summary Table - Metals Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIUM DATE COLLECTED MSB-WSP-PRE- UNF Water MSB-WSP-PRE- UNF D Water 7/28/2009 7/28/2009 MSB-WSP-PRE- FIL MSB-SAG-POS- UNF MSB-MID-POS- UNF /28/2009 7/29/2009 7/29/2009 National Primary Drinking Water Regulations (MCLs) Total Metals (µg/l) Aluminum, Total 50 U 50 U 50 U 50 U 50 U 50(V) NA Calcium, Total 23,000 24,000 24,000 29,000 24,000 NA NA Iron, Total 13 J 14 J 20 U J 300(E) NA Magnesium, Total 6,800 6,800 7,100 7,000 7, ,000 NA Manganese, Total 2.6 J 3.1 J 10 U 10 U 10 U 50(E) NA Nickel, Total 10 U 10 U 10 U 10 U 10 U 100(A) NA Potassium, Total NA NA Sodium, Total 3,700 3,800 3,900 4,200 4, ,000 NA Antimony, Total 1 U 1 U J 0.44 J 6.0(A) 6 Arsenic, Total 0.56 J 1U 1U 1U 1U 10(A) 10 Barium, Total ,000(A) 2,000 Beryllium, Total 1 U 1 U 1 U 1 U 1 U 4.0(A) 4 Cadmium, Total 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 5.0(A) 5 Chromium, Total 0.9 J 0.95 J 2.7 J 0.62 J 0.69 J 100(A) 1,000 Cobalt, Total 1 U 1 U J 1U 1U 40 NA Copper, Total ,000(E) 1,300 Lead, Total 1 U 1 U 0.34 J 0.37 J 1U 4.0 (L) 15 Selenium, Total 2 U 2 U 2 U 2 U 2 U 50(A) 50 Silver, Total 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 34 NA Thallium, Total 1 U 1 U 1 U 1 U J 2.0(A) 2 Vanadium, Total 0.44 J 0.42 J 0.46 J 1U 1U 4.5 NA Zinc, Total 2.4 J 3.6 J 3.9 J 3.3 J 4.4 J 2,400 NA Mercury, Total J 0.2 U J 0.2 U 0.2 U 2.0(A) 2 Cyanide, Total 5 U 5 U 5 U 5 U 5 U 200(A) 200 Total Suspended Solids (mg/l) 3.3 U 3.3 U NS NS NS NA NA Water Water Water MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria I:\WO\START3\689\41057TBL1-1.XLS 1 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

16 Table 1-1 Analytical Results Summary Table - Metals Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan Notes: All results and criteria are presented in µg/l. Bold values display detections. Highlighted values exceed MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria. Italicized values exceed National Primary Drinking Water Regulations (MCLs) µg/l - Microgram per liter (A) - Criterion is MDEQ Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL (E) - Criterion is aesthetic drinking water value required by Section 20120a(5) of Natural Resources and the Environmental Protection Act, 1994 PA 451, as amended ID - Identification J - Estimated concentration (L) - Criteria for lead derived using a biologically based model as allowed for under Section 20120a(10) of NREPA MCL - Maximum contaminant level MDEQ - Michigan Department of Environmental Quality NA - Not available NS - Analyte not sampled for U - Analyte not detected above reporting limit (V) - Criterion is the aesthetic drinking water value as required by Section 20120(a)(5) of the NREPA. Concentrations up to 200 ug/l may be acceptable, and still allow for drinking water use, as part of a site-specific cleanup under Section 20120a(2) of the NREPA. I:\WO\START3\689\41057TBL1-1.XLS 2 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

17 Table 1-2 Analytical Results Summary Table - Pesticides and PCBs Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIUM DATE COLLECTED MSB-WSP-PRE- UNF Water 7/28/2009 MSB-WSP-PRE- UNF D Water MSB-WSP-PRE- FIL Water MSB-SAG-POS- UNF Water MSB-MID-POS- UNF /28/2009 7/28/2009 7/29/2009 7/29/2009 MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) Organochlorine Pesticides (µg/l) 4,4'-DDD 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 9.1 NA 4,4'-DDE 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 4.3 NA 4,4'-DDT 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 3.6 NA Aldrin 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U NA alpha-bhc 0.05 U 0.05 U 0.05 U 0.05 U J NA NA alpha-chlordane 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U NA NA beta-bhc 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U NA NA delta-bhc 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U NA NA Dieldrin 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.11 NA Endosulfan I 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U NA NA Endosulfan II 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U NA NA Endosulfan Sulfate 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U NA NA Endrin 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 2.0(A) 2 Endrin Aldehyde 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U NA NA Endrin Ketone 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U NA NA gamma-bhc (Lindane) 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U 0.2 (A) 0.2 gamma-chlordane 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U 2.0 (A) 2 Heptachlor 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U 0.4(A) 0.4 Heptachlor Epoxide 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U 0.2(A) 0.2 Methoxychlor 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 40(A) 40 Toxaphene 5 U 5 U 5 U 5 U 5 U 3.0(A) 3 Water I:\WO\START3\689\41057TBL1-2.XLS 3 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

18 Table 1-2 Analytical Results Summary Table - Pesticides and PCBs Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIUM MSB-WSP-PRE- UNF Water MSB-WSP-PRE- UNF D Water MSB-WSP-PRE- FIL Water MSB-SAG-POS- UNF Water MSB-MID-POS- UNF Water MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) DATE COLLECTED 7/28/2009 7/28/2009 7/28/2009 7/29/2009 7/29/2009 PCBs (µg/l) PCB U 0.2 U 0.2 U 0.2 U 0.2 U 0.5 (A) 0.5 PCB U 0.2 U 0.2 U 0.2 U 0.2 U 0.5 (A) 0.5 PCB U 0.2 U 0.2 U 0.2 U 0.2 U 0.5 (A) 0.5 PCB U 0.2 U 0.2 U 0.2 U 0.2 U 0.5 (A) 0.5 PCB U 0.2 U 0.2 U 0.2 U 0.2 U 0.5 (A) 0.5 PCB U 0.2 U 0.2 U 0.2 U 0.2 U 0.5 (A) 0.5 PCB U 0.2 U 0.2 U 0.2 U 0.2 U 0.5 (A) 0.5 Notes: All results and criteria are presented in µg/l. Bold values display detections. Highlighted values exceed MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria. Italicized values exceed National Primary Drinking Water Regulations (MCLs) µg/l - Microgram per liter (A) - Criterion is MDEQ Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL ID - Identification J - Estimated concentration MCL - Maximum contaminant level MDEQ - Michigan Department of Environmental Quality NA - Not available PCB - Polychlorinated biphenyl U - Analyte not detected above reporting limit I:\WO\START3\689\41057TBL1-2.XLS 4 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

19 SAMPLE ID SAMPLE MEDIUM DATE COLLECTED Table 1-3 Analytical Results Summary Table - VOCs Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-WSP-PRE- UNF Water MSB-WSP-PRE- UNF D Water MSB-SAG-POS- UNF Water MSB-MID-POS- UNF Water 7/28/2009 7/28/2009 7/29/2009 7/29/2009 MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) VOCs (µg/l) 1,1,1-Trichloroethane 1 U 1 U 1 U 1 U 200(A) 200 1,1,2,2-Tetrachloroethane 1 U 1 U 1 U 1 U 8.5 NA 1,1,2-Trichloro-1,2,2-trifluoroethane 1 U 1 U 1 U 1 U 170,000(S) NA 1,1,2-Trichloroethane 1 U 1 U 1 U 1 U 5.0(A) 5 1,1-Dichloroethane 1 U 1 U 1 U 1 U 880 NA 1,1-Dichloroethene 1 U 1 U 1 U 1 U 7.0(A) 7 1,2,4-Trichlorobenzene 1 U 1 U 1 U 1 U 70(A) 70 1,2-Dibromo-3-chloropropane 1 U 1 U 1 U 1 U NA 0.2 1,2-Dibromoethane 1 U 1 U 1 U 1 U 0.05 (A) ,2-Dichlorobenzene 1 U 1 U 1 U 1 U 600(A) 600 1,2-Dichloroethane 1 U 1 U 1 U 1 U 5.0(A) 5 1,2-Dichloropropane 1 U 1 U 1 U 1 U 5.0(A) 5 1,3-Dichlorobenzene 1 U 1 U 1 U 1 U 6.6 NA 1,4-Dichlorobenzene 1 U 1 U 1 U 1 U 75(A) 75 2-Butanone (MEK) 5 U 5 U 5 U 5 U 13,000 NA 2-Hexanone 5 U 5 U 5 U 5 U 3,000 NA 4-Methyl-2-pentanone (MIBK) 5 U 5 U 5 U 5 U 1,800 NA Acetone 5 U 5 U 5 U 5 U 730 NA Benzene 1 U 1 U 1 U 1 U 5.0(A) 5 Bromodichloromethane 1 U 1 U (A,W) 80a Bromoform 1U 1U 1U 1U 80(A,W) 80a Bromomethane 1 U 1 U 1 U 1 U 10 NA Carbon Disulfide 5 U 5 U 5 U 5 U 800 NA Carbon Tetrachloride 1 U 1 U 1 U 1 U 5.0(A) 5 Chlorobenzene 1 U 1 U 1 U 1 U 100(A) 100 Chloroethane 1 U 1 U 1 U 1 U 430 NA Chloroform 1 U 1 U (A,W) 80a Chloromethane 1 U 1 U 0.29 J 0.33 J 260 NA cis-1,2-dichloroethene 1 U 1 U 1 U 1 U 70(A) 70 cis-1,3-dichloropropene 1 U 1 U 1 U 1 U NA NA Cyclohexane 5 U 5 U 5 U 5 U NA NA Dibromochloromethane 1 U 1 U (A,W) 80a I:\WO\START3\689\41057TBL1-3.XLS 5 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

20 SAMPLE ID SAMPLE MEDIUM Table 1-3 Analytical Results Summary Table - VOCs Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-WSP-PRE- UNF Water MSB-WSP-PRE- UNF D Water MSB-SAG-POS- UNF Water MSB-MID-POS- UNF Water MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) DATE COLLECTED 7/28/2009 7/28/2009 7/29/2009 7/29/2009 VOCs (µg/l) Dichlorodifluoromethane 1 U 1 U 1 U 1 U 1,700 NA Ethylbenzene 1 U 1 U 1 U 1 U 74(E) 700 Isopropylbenzene 1 U 1 U 1 U 1 U 800 NA Methyl Acetate 5 U 5 U 5 U 5 U NA NA Methyl tert-butyl Ether 1U 1U 1U 1U 40(E) NA Methylcyclohexane 5 U 5 U 5 U 5 U NA NA Methylene Chloride 1 U 1 U 1 U 1 U 5.0(A) 5 Styrene 1 U 1 U 1 U 1 U 100(A) 100 Tetrachloroethene 1 U 1 U 1 U 1 U 5.0(A) 5 Toluene 1 U 1 U 1 U 1 U 790(E) 1,000 trans-1,2-dichloroethene 1 U 1 U 1 U 1 U 100(A) 100 trans-1,3-dichloropropene 1 U 1 U 1 U 1 U NA NA Trichloroethene 1 U 1 U 1 U 1 U 5.0(A) 5 Trichlorofluoromethane 1 U 1 U 1 U 1 U 2,600 NA Vinyl Chloride 1 U 1 U 1 U 1 U 2.0(A) 2 Xylene (Total) 3 U 3 U 3 U 3 U 280(E) 10,000 Notes: All results and criteria are presented in µg/l. Bold values display detections. Highlighted values exceed MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria. Italicized values exceed National Primary Drinking Water Regulations (MCLs) µg/l - Microgram per liter (A) - Criterion is MDEQ Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL (E) - Criterion is aesthetic drinking water value required by Section 20120a(5) of Natural Resources and the Environmental Protection Act, 1994 PA 451, as amended (NREPA) ID - Identification J - Estimated concentration MCL - Maximum contaminant level MDEQ - Michigan Department of Environmental Quality NA - Not available (S) - Criterion defaults to hazardous substance-specific water solubility limit U - Analyte not detected above reporting limit VOC - Volatile organic compound (W) - Concentration of trihalomethanes in groundwater shall be added together to determine compliance with the MDEQ drinking water standard of 80 µg/l a The MCL is the total concentration of trihalomethanes I:\WO\START3\689\41057TBL1-3.XLS 6 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

21 SAMPLE ID SAMPLE MEDIUM Table 1-4 Analytical Results Summary Table - SVOCs Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-WSP-PRE- MSB-WSP-PRE- MSB-WSP-PRE- MSB-SAG-POS- MSB-MID-POS- UNF UNF D FIL UNF UNF Water Water Water Water Water DATE COLLECTED 7/28/2009 7/28/2009 7/28/2009 7/29/2009 7/29/2009 MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) 1,1'-Biphenyl 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U NA NA 2,4,5-Trichlorophenol 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 730 NA 2,4,6-Trichlorophenol 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 120 NA 2,4-Dichlorophenol 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 73 NA 2,4-Dimethylphenol 1 U 1 U 1 U 1 U 1 U 370 NA 2,4-Dinitrophenol 5 U 5 U 5 U 5 U 5 U NA NA 2,4-Dinitrotoluene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 7.7 NA 2,6-Dinitrotoluene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U NA NA 2-Chloronaphthalene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U NA NA 2-Chlorophenol 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 45 NA 2-Methylnaphthalene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 260 NA 2-Methylphenol 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U NA NA 2-Nitroaniline 1 U 1 U 1 U 1 U 1 U NA NA 2-Nitrophenol 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 20 NA 3,3 -Dichlorobenzidine 1 U 1 U 1 U 1 U 1 U 1.1 NA 3-Nitroaniline 1 U 1 U 1 U 1 U 1 U NA NA 4,6-Dinitro-2-methylphenol 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U NA NA 4-Bromophenyl Phenyl Ether 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U NA NA 4-Chloro-3-methylphenol 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 150 NA 4-Chloroaniline 1 U 1 U 1 U 1 U 1 U NA NA 4-Chlorophenyl Phenyl Ether 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U NA NA 4-Methylphenol 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U NA NA 4-Nitroaniline 1 U 1 U 1 U 1 U 1 U NA NA 4-Nitrophenol 5 U 5 U 5 U 5 U 5 U NA NA Acenaphthene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 1,300 NA Acenaphthylene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 52 NA Acetophenone 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 1,500 NA Anthracene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 43(S) NA I:\WO\START3\689\41057TBL1-4.XLS 7 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

22 SAMPLE ID SAMPLE MEDIUM Table 1-4 Analytical Results Summary Table - SVOCs Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-WSP-PRE- MSB-WSP-PRE- MSB-WSP-PRE- MSB-SAG-POS- MSB-MID-POS- UNF UNF D FIL UNF UNF Water Water Water Water Water DATE COLLECTED 7/28/2009 7/28/2009 7/28/2009 7/29/2009 7/29/2009 MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) Atrazine 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 3.0(A) 3 Benzaldehyde 0.5 U 0.5 U 0.5 U 0.34 J 0.35 J NA NA Benzo(a)anthracene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 2.1 NA Benzo(a)pyrene 0.2 U 0.2 U 0.2 U 0.2 U 0.2 U 5.0(A) 0.2 Benzo(b)fluoranthene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 1.5(S,AA) NA Benzo(g,h,i)perylene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 1.0(M); 0.26(S) NA Benzo(k)fluoranthene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 1.0(M); 0.8(S) NA Bis(2-chloroethoxy)methane 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U NA NA Bis(2-chloroethyl) Ether 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 2 NA Bis(2-chloroisopropyl) Ether 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U NA NA Bis(2-ethylhexyl) Phthalate 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 6.0(A) 6 Butyl Benzyl Phthalate J J 1U J 0.11 J 1,200 NA Caprolactam 1UJ 1UJ 1UJ 1UJ 1UJ 5,800 NA Carbazole 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 85 NA Chrysene 0.5 U J 0.5 U 0.5 U J 1.6(S) NA Di-n-butyl Phthalate 0.46 J 1U U 3.4 U 880 NA Di-n-octyl Phthalate 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 130 NA Dibenz(a,h)anthracene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 2.0(M); 0.21 NA Dibenzofuran 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U ID NA Diethyl Phthalate 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 5,500 NA Dimethyl Phthalate 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 73,000 NA Fluoranthene 0.5 U 0.5 U 0.5 U 0.5 U J 210(S) NA Fluorene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 880 NA Hexachlorobenzene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 1.0(A) 1 Hexachlorobutadiene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 15 NA Hexachlorocyclopentadiene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 50(A) 50 Hexachloroethane 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 7.3 NA I:\WO\START3\689\41057TBL1-4.XLS 8 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

23 SAMPLE ID SAMPLE MEDIUM Table 1-4 Analytical Results Summary Table - SVOCs Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-WSP-PRE- MSB-WSP-PRE- MSB-WSP-PRE- MSB-SAG-POS- MSB-MID-POS- UNF UNF D FIL UNF UNF Water Water Water Water Water DATE COLLECTED 7/28/2009 7/28/2009 7/28/2009 7/29/2009 7/29/2009 MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) Indeno(1,2,3-cd)pyrene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 2.0(M); 0022(S) NA Isophorone 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 770 NA N-Nitroso-di-n-propylamine 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 5.0(M); 0.19 NA N-Nitroso-diphenylamine 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 270 NA Naphthalene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 520 NA Nitrobenzene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 3.4 NA Pentachlorophenol 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 1.0(A) 1 Phenanthrene 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 52 NA Phenol 0.5 U 0.5 U 0.5 U 0.5 U 0.5 U 4,400 NA Pyrene 0.5 U 0.5 U 0.5 U 0.5 U J 140(S) NA Notes: All results and criteria are presented in µg/l. Bold values display detections. Highlighted values exceed MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria. Italicized values exceed National Primary Drinking Water Regulations (MCLs) µg/l - Microgram per liter (A) - Criterion is MDEQ Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL (AA) - Comparison to criteria may take into account evaluation of if hazardous substances are adsorbed to particulates rather than dissolved in water and if filtered groundwater samples were used to evaluate groundwater ID - Identification or insufficient data J - Estimated concentration (M) - Calculated criterion is below analytical target detection limit,; therefore, the criterion defaults to target detection limit MCL - Maximum contaminant level MDEQ - Michigan Department of Environmental Quality NA - Not available (S) - Criterion defaults to hazardous substance-specific water solubility limit SVOC - Semivolatile organic compound U - Analyte not detected above reporting limit I:\WO\START3\689\41057TBL1-4.XLS 9 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

24 Table 1-5 Analytical Results Summary Table - Dioxins and Furans Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIUM MSB-WSP-PRE- MSB-WSP-PRE- MSB-WSP-PRE-FIL- MSB-SAG-POS-UNF- MSB-MID-POS-UNF- UNF UNF D Water Water Water Water Water DATE COLLECTED 7/28/2009 7/28/2009 7/28/2009 7/29/2009 7/29/2009 MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) Dioxin/Furan (µg/l) 2,3,7,8-TCDD U U U U U (A,O) ,2,3,7,8-PeCDD U NA U U U NA NA 1,2,3,4,7,8-HxCDD U NA U U U NA NA 1,2,3,6,7,8-HxCDD U NA U U U NA NA 1,2,3,7,8,9-HxCDD U NA U U U NA NA 1,2,3,4,6,7,8-HpCDD U NA U U U NA NA OCDD U NA U U 0.0 U NA NA 2,3,7,8-TCDF J NA J J 0.0 J NA NA 1,2,3,7,8-PeCDF U NA J J 0.0 J NA NA 2,3,4,7,8-PeCDF U NA J J 0.0 J NA NA 1,2,3,4,7,8-HxCDF UJ NA J U 0.0 UJ NA NA 1,2,3,6,7,8-HxCDF U NA U U 0.0 U NA NA 2,3,4,6,7,8-HxCDF U NA U U 0.0 U NA NA 1,2,3,7,8,9-HxCDF U NA U U 0.0 U NA NA 1,2,3,4,6,7,8-HpCDF U NA U U 0.0 U NA NA 1,2,3,4,7,8,9-HpCDF U NA U U 0.0 U NA NA OCDF U NA U U 0.0 U NA NA Total TCDDs U NA U U 0.0 U NA NA Total PeCDDs U NA U U 0.0 U NA NA Total HxCDDs U NA U U 0.0 U NA NA Total HpCDDs U NA U U U NA NA Total TCDFs U NA J J U NA NA Total PeCDFs U NA J J J NA NA Total HxCDFs U NA J U U NA NA Total HpCDFs U NA U U 0.0 U NA NA I:\WO\START3\689\41057TBL1-5.XLS 10 of 11 This document shall not be disclosed without the written express permission of U.S. EPA 689-2A-AEYL

25 Table 1-5 Analytical Results Summary Table - Dioxins and Furans Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan Notes: Detectable concentrations of furans were present in the laboratory method blank; associated results have been qualified accordingly. All results and criteria are presented in µg/l. Bold values display detections. Highlighted values exceed MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria. Italicized values exceed National Primary Drinking Water Regulations (MCLs) µg/l - Microgram per liter (A) - Criterion is MDEQ Drinking Water Standard pursuant to Section 5 of 1976 PA 399, MCL HpCDD - heptachlorodibenzo-p-dioxin HpCDF - heptachlorodibenofuran HxCDD - hexachlorodibenzo-p-dioxin HxCDF - heptachlorodibenzofuran ID - Identification J - Estimated concentration MCL - Maximum contaminant level MDEQ - Michigan Department of Environmental Quality NA - Not available OCDD - ochtachlorodibenzo-p-dioxin OCDF - octachlorodibenzofuran (O) - Generic cleanup criteria are being held at values that MDEQ has used since August 1998 in recognition of the fact that national efforts to reassess risks posed by dioxin are not yet complete PeCDD - pentachlorodibenzo-p-dioxin PeCDF - pentachlorodibenzofuran TCDD - tetrachlorodibenzo-p-dioxin TCDF - tetrachlorodibenzofuran U - Analyte not detected above reporting limit I:\WO\START3\689\41057TBL1-5.XLS 11 of 11 This document shall not be disclosed without the written express permission of U.S. EPA 689-2A-AEYL

26 Table 2-1 Analytical Results Summary Table - Metals Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIUM DATE COLLECTED 7/28/2009 MSB-BAY-PRE- MSB-BAY-PRE-FIL- MSB-BAY-POS-UNF- MDEQ Part 201 UNF Residential and Water Water Water Commercial 1 Drinking Water Criteria 7/28/2009 7/28/2009 National Primary Drinking Water Regulations (MCLs) Total Metals (µg/l) Aluminum, Total 50 U 50 U 50 U 50(V) NA Calcium, Total 38,000 37,000 23,000 NA NA Iron, Total U (E) NA Magnesium, Total 12,000 11,000 11, ,000 NA Manganese, Total U 10 U 50(E) NA Nickel, Total 10 U 10 U 10 U 100(A) NA Potassium, Total 2,000 1,900 2,000 NA NA Sodium, Total 13,000 12,000 13, ,000 NA Antimony, Total 1 U 1 U 1 U 6.0(A) 6 Arsenic, Total 0.76 J 0.5 J 1U 10(A) 10 Barium, Total ,000(A) 2,000 Beryllium, Total 1 U 1 U 1 U 4.0(A) 4 Cadmium, Total 0.2 U 0.2 U 0.2 U 5.0(A) 5 Chromium, Total 0.89 J 0.78 J 0.97 J 100(A) 1,000 Cobalt, Total J J J 40 NA Copper, Total ,000(E) 1,300 Lead, Total 0.68 J 0.3 J 0.62 J 4.0 (L) 15 Selenium, Total 2 U 2 U 2 U 50(A) 50 Silver, Total 0.2 U 0.2 U 0.2 U 34 NA Thallium, Total 1 U 1 U 1 U 2.0(A) 2 Vanadium, Total 0.93 J 0.76 J 0.81 J 4.5 NA Zinc, Total 7.6 J 5.1 J 8.9 J 2,400 NA Mercury, Total 0.2 U J 0.2 U 2.0(A) 2 Cyanide, Total 5 U 5 U 5 U 200(A) 200 Total Suspended Solids (mg/l) 5 NS NS NA NA I:\WO\START3\689\41057TBL2-1.XLS 1 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

27 Table 2-1 Analytical Results Summary Table - Metals Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan Notes: All results and criteria are presented in µg/l. Bold values display detections. Highlighted values exceed MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria. Italicized values exceed National Primary Drinking Water Regulations (MCLs) µg/l - Microgram per liter (A) - Criterion is MDEQ Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL (E) - Criterion is aesthetic drinking water value required by Section 20120a(5) of Natural Resources and the Environmental Protection Act, 1994 PA 451, as amended (NREPA) ID - Identification J - Estimated concentration (L) - Criteria for lead derived using a biologically based model as allowed for under Section 20120a(10) of NREPA MCL - Maximum contaminant level MDEQ - Michigan Department of Environmental Quality NA - Not available NS - Analyte not sampled for U - Analyte not detected above reporting limit (V) - Criterion is the aesthetic drinking water value as required by Section 20120(a)(5) of the NREPA. Concentrations up to 200 ug/l may be acceptable, and still allow for drinking water use, as part of a site-specific cleanup under Section 20120a(2) of the NREPA. I:\WO\START3\689\41057TBL2-1.XLS 2 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

28 SAMPLE ID SAMPLE MEDIUM Table 2-2 Analytical Results Summary Table - Pesticides and PCBs Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-BAY-PRE-UNF- MSB-BAY-PRE-FIL- MSB-BAY-POS-UNF Water Water Water DATE COLLECTED 7/28/2009 7/28/2009 7/28/2009 Organochlorine Pesticides (µg/l) MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) 4,4'-DDD 0.1 U 0.1 U 0.1 U 9.1 NA 4,4'-DDE 0.1 U 0.1 U 0.1 U 4.3 NA 4,4'-DDT 0.1 U 0.1 U 0.1 U 3.6 NA Aldrin 0.05 U 0.05 U 0.05 U NA alpha-bhc 0.05 U 0.05 U 0.05 U NA NA alpha-chlordane 0.05 U 0.05 U 0.05 U NA NA beta-bhc 0.05 U 0.05 U 0.05 U NA NA delta-bhc 0.05 U 0.05 U 0.05 U NA NA Dieldrin 0.1 U 0.1 U J 0.11 NA Endosulfan I 0.05 U 0.05 U 0.05 U NA NA Endosulfan II 0.1 U 0.1 U 0.1 U NA NA Endosulfan Sulfate 0.1 U 0.1 U 0.1 U NA NA Endrin 0.1 U 0.1 U 0.1 U 2.0(A) 2 Endrin Aldehyde 0.1 U 0.1 U 0.1 U NA NA Endrin Ketone 0.1 U 0.1 U 0.1 U NA NA gamma-bhc (Lindane) 0.05 U 0.05 U 0.05 U 0.2 (A) 0.2 gamma-chlordane 0.05 U 0.05 U 0.05 U 2.0 (A) 2 Heptachlor J J 0.05 U 0.4(A) 0.4 Heptachlor Epoxide 0.05 U 0.05 U 0.05 U 0.2(A) 0.2 Methoxychlor 0.5 U 0.5 U 0.5 U 40(A) 40 Toxaphene 5 U 5 U 5 U 3.0(A) 3 I:\WO\START3\689\41057TBL2-2.XLS 3 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

29 SAMPLE ID SAMPLE MEDIUM Table 2-2 Analytical Results Summary Table - Pesticides and PCBs Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-BAY-PRE-UNF- MSB-BAY-PRE-FIL- MSB-BAY-POS-UNF Water Water Water MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) DATE COLLECTED 7/28/2009 7/28/2009 7/28/2009 PCBs (µg/l) PCB U 0.2 U 0.2 U 0.5 (A) 0.5 PCB U 0.2 U 0.2 U 0.5 (A) 0.5 PCB U 0.2 U 0.2 U 0.5 (A) 0.5 PCB U 0.2 U 0.2 U 0.5 (A) 0.5 PCB U 0.2 U 0.2 U 0.5 (A) 0.5 PCB U 0.2 U 0.2 U 0.5 (A) 0.5 PCB U 0.2 U 0.2 U 0.5 (A) 0.5 Notes: All results and criteria are presented in µg/l. Bold values display detections. Highlighted values exceed MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria. Italicized values exceed National Primary Drinking Water Regulations (MCLs) µg/l - Microgram per liter (A) - Criterion is MDEQ Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL ID - Identification J - Estimated concentration MCL - Maximum contaminant level MDEQ - Michigan Department of Environmental Quality NA - Not available PCB - Polychlorinated biphenyl U - Analyte not detected above reporting limit I:\WO\START3\689\41057TBL2-2.XLS 4 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

30 Table 2-3 Analytical Results Summary Table - VOCs Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIUM DATE COLLECTED MSB-BAY-PRE- MSB-BAY-PRE- MSB-BAY-POS- UNF FIL UNF Water Water Water 7/28/2009 7/28/2009 7/28/2009 MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) VOCs (µg/l) 1,1,1-Trichloroethane 1 U NS 1 U 200(A) 200 1,1,2,2-Tetrachloroethane 1 U NS 1 U 8.5 NA 1,1,2-Trichloro-1,2,2-trifluoroethane 1 U NS 1 U 170,000(S) NA 1,1,2-Trichloroethane 1 U NS 1 U 5.0(A) 5 1,1-Dichloroethane 1 U NS 1 U 880 NA 1,1-Dichloroethene 1 U NS 1 U 7.0(A) 7 1,2,4-Trichlorobenzene 1 U NS 1 U 70(A) 70 1,2-Dibromo-3-chloropropane 1 U NS 1 U NA 0.2 1,2-Dibromoethane 1 U NS 1 U 0.05 (A) ,2-Dichlorobenzene 1 U NS 1 U 600(A) 600 1,2-Dichloroethane 1 U NS 1 U 5.0(A) 5 1,2-Dichloropropane 1 U NS 1 U 5.0(A) 5 1,3-Dichlorobenzene 1 U NS 1 U 6.6 NA 1,4-Dichlorobenzene 1 U NS 1 U 75(A) 75 2-Butanone (MEK) 5 U NS 5 U 13,000 NA 2-Hexanone 5 U NS 5 U 3,000 NA 4-Methyl-2-pentanone (MIBK) 5 U NS 5 U 1,800 NA Acetone 5 U NS 5 U 730 NA Benzene 1 U NS 1 U 5.0(A) 5 Bromodichloromethane 1 U NS 24 80(A,W) 80a Bromoform 1U NS 1U 80(A,W) 80a Bromomethane 1 U NS 1 U 10 NA Carbon Disulfide 5 U NS 5 U 800 NA Carbon Tetrachloride 1 U NS 1 U 5.0(A) 5 Chlorobenzene 1 U NS 1 U 100(A) 100 Chloroethane 1 U NS 1 U 430 NA Chloroform 0.28 J NS 64 80(A,W) 80a Chloromethane 1 U NS 0.35 J 260 NA cis-1,2-dichloroethene 1 U NS 1 U 70(A) 70 cis-1,3-dichloropropene 1 U NS 1 U NA NA Cyclohexane 5 U NS 5 U NA NA Dibromochloromethane 1 U NS (A,W) 80a Dichlorodifluoromethane 1 U NS 1 U 1,700 NA Ethylbenzene 1 U NS 1 U 74(E) 700 Isopropylbenzene 1 U NS 1 U 800 NA I:\WO\START3\689\41057TBL2-3.XLS 5 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

31 Table 2-3 Analytical Results Summary Table - VOCs Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIUM MSB-BAY-PRE- MSB-BAY-PRE- MSB-BAY-POS- UNF FIL UNF Water Water Water MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) DATE COLLECTED 7/28/2009 7/28/2009 7/28/2009 VOCs (µg/l) Methyl Acetate 5 U NS 5 U NA NA Methyl tert-butyl Ether 1U NS 1U 40(E) NA Methylcyclohexane 5 U NS 5 U NA NA Methylene Chloride 1 U NS 1 U 5.0(A) 5 Styrene 1 U NS 1 U 100(A) 100 Tetrachloroethene 1 U NS 1 U 5.0(A) 5 Toluene 1 U NS 1 U 790(E) 1,000 trans-1,2-dichloroethene 1 U NS 1 U 100(A) 100 trans-1,3-dichloropropene 1 U NS 1 U NA NA Trichloroethene 1 U NS 1 U 5.0(A) 5 Trichlorofluoromethane 1 U NS 1 U 2,600 NA Vinyl Chloride 1 U NS 1 U 2.0(A) 2 Xylene (Total) 3 U NS 3 U 280(E) 10,000 Notes: All results and criteria are presented in µg/l. Bold values display detections. Highlighted values exceed MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria. Italicized values exceed National Primary Drinking Water Regulations (MCLs) µg/l - Microgram per liter (A) - Criterion is MDEQ Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL (E) - Criterion is aesthetic drinking water value required by Section 20120a(5) of Natural Resources and the Environmental Protection Act, 1994 PA ID - Identification J - Estimated concentration MCL - Maximum contaminant level MDEQ - Michigan Department of Environmental Quality NA - Not available NS - Analyte not sampled for (S) - Criterion defaults to hazardous substance-specific water solubility limit U - Analyte not detected above reporting limit VOC - Volatile organic compound (W) - Concentration of trihalomethanes in groundwater shall be added together to determine compliance with the MDEQ drinking water standard of 80 µg/l a The MCL is the total concentration of trihalomethanes I:\WO\START3\689\41057TBL2-3.XLS 6 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

32 SAMPLE ID SAMPLE MEDIUM Table 2-4 Analytical Results Summary Table - SVOCs Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-BAY-PRE-UNF- MSB-BAY-PRE-FIL Water Water MSB-BAY-POS- UNF Water DATE COLLECTED 7/28/2009 7/28/2009 7/28/2009 SVOCs (µg/l) MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) 1,1'-Biphenyl 0.5 U 0.5 U 0.5 U NA NA 2,4,5-Trichlorophenol 0.5 U 0.5 U 0.5 U 730 NA 2,4,6-Trichlorophenol 0.5 U 0.5 U 0.5 U 120 NA 2,4-Dichlorophenol 0.5 U 0.5 U 0.5 U 73 NA 2,4-Dimethylphenol 1 U 1 U 1 U 370 NA 2,4-Dinitrophenol 5 U 5 U 5 U NA NA 2,4-Dinitrotoluene 0.5 U 0.5 U 0.5 U 7.7 NA 2,6-Dinitrotoluene 0.5 U 0.5 U 0.5 U NA NA 2-Chloronaphthalene 0.5 U 0.5 U 0.5 U NA NA 2-Chlorophenol 0.5 U 0.5 U 0.5 U 45 NA 2-Methylnaphthalene 0.5 U 0.5 U 0.5 U 260 NA 2-Methylphenol 0.5 U 0.5 U 0.5 U NA NA 2-Nitroaniline 1 U 1 U 1 U NA NA 2-Nitrophenol 0.5 U 0.5 U 0.5 U 20 NA 3,3 -Dichlorobenzidine 1 U 1 U 1 U 1.1 NA 3-Nitroaniline 1 U 1 U 1 U NA NA 4,6-Dinitro-2-methylphenol 0.5 U 0.5 U 0.5 U NA NA 4-Bromophenyl Phenyl Ether 0.5 U 0.5 U 0.5 U NA NA 4-Chloro-3-methylphenol 0.5 U 0.5 U 0.5 U 150 NA 4-Chloroaniline 1 U 1 U 1 U NA NA 4-Chlorophenyl Phenyl Ether 0.5 U 0.5 U 0.5 U NA NA 4-Methylphenol 0.5 U 0.5 U 0.5 U NA NA 4-Nitroaniline 1 U 1 U 1 U NA NA 4-Nitrophenol 5 U 5 U 5 U NA NA Acenaphthene 0.5 U 0.5 U 0.5 U 1,300 NA Acenaphthylene 0.5 U 0.5 U 0.5 U 52 NA Acetophenone 0.5 U 0.5 U 0.5 U 1,500 NA Anthracene 0.5 U 0.5 U 0.5 U 43(S) NA I:\WO\START3\689\41057TBL2-4.XLS 7 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

33 Table 2-4 Analytical Results Summary Table - SVOCs Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-BAY-PRE-UNF- MSB-BAY-PRE-FIL- MSB-BAY-POS- SAMPLE ID SAMPLE MEDIUM Water Water UNF Water MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) DATE COLLECTED 7/28/2009 7/28/2009 7/28/2009 SVOCs (µg/l) Atrazine 0.5 U 0.5 U 0.5 U 3.0(A) 3 Benzaldehyde 0.5 U 0.5 U 0.4 J NA NA Benzo(a)anthracene 0.5 U 0.5 U 0.5 U 2.1 NA Benzo(a)pyrene 0.2 U 0.2 U 0.2 U 5.0(A) 0.2 Benzo(b)fluoranthene 0.5 U 0.5 U 0.5 U 1.5(S,AA) NA Benzo(g,h,i)perylene 0.5 U 0.5 U 0.5 U 1.0(M); 0.26(S) NA Benzo(k)fluoranthene 0.5 U 0.5 U 0.5 U 1.0(M); 0.8(S) NA Bis(2-chloroethoxy)methane 0.5 U 0.5 U 0.5 U NA NA Bis(2-chloroethyl) Ether 0.5 U 0.5 U 0.5 U 2 NA Bis(2-chloroisopropyl) Ether 0.5 U 0.5 U 0.5 U NA NA Bis(2-ethylhexyl) Phthalate 0.5 U 0.5 U 0.43 J 6.0(A) 6 Butyl Benzyl Phthalate 1 U 1 U 0.13 J 1,200 NA Caprolactam 1UJ 1UJ 1UJ 5,800 NA Carbazole 0.5 U 0.5 U 0.5 U 85 NA Chrysene 0.5 U 0.5 U 0.5 U 1.6(S) NA Di-n-butyl Phthalate J 3.4 U 880 NA Di-n-octyl Phthalate 0.5 U 0.5 U 0.5 U 130 NA Dibenz(a,h)anthracene 0.5 U 0.5 U 0.5 U 2.0(M); 0.21 NA Dibenzofuran 0.5 U 0.5 U 0.5 U ID NA Diethyl Phthalate 0.5 U 0.5 U 0.5 U 5,500 NA Dimethyl Phthalate 0.5 U 0.5 U 0.5 U 73,000 NA Fluoranthene 0.5 U 0.5 U 0.5 U 210(S) NA Fluorene 0.5 U 0.5 U 0.5 U 880 NA Hexachlorobenzene 0.5 U 0.5 U 0.5 U 1.0(A) 1 Hexachlorobutadiene 0.5 U 0.5 U 0.5 U 15 NA Hexachlorocyclopentadiene 0.5 U 0.5 U 0.5 U 50(A) 50 Hexachloroethane 0.5 U 0.5 U 0.5 U 7.3 NA Indeno(1,2,3-cd)pyrene 0.5 U 0.5 U 0.5 U 2.0(M); 0022(S) NA I:\WO\START3\689\41057TBL2-4.XLS 8 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

34 Table 2-4 Analytical Results Summary Table - SVOCs Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-BAY-PRE-UNF- MSB-BAY-PRE-FIL- MSB-BAY-POS- SAMPLE ID SAMPLE MEDIUM Water Water UNF Water MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) DATE COLLECTED 7/28/2009 7/28/2009 7/28/2009 SVOCs (µg/l) Isophorone 0.5 U 0.5 U 0.5 U 770 NA N-Nitroso-di-n-propylamine 0.5 U 0.5 U 0.5 U 5.0(M); 0.19 NA N-Nitroso-diphenylamine 0.5 U 0.5 U 0.5 U 270 NA Naphthalene 0.5 U 0.5 U 0.5 U 520 NA Nitrobenzene 0.5 U 0.5 U 0.5 U 3.4 NA Pentachlorophenol 0.5 U 0.5 U 0.5 U 1.0(A) 1 Phenanthrene 0.5 U 0.5 U 0.5 U 52 NA Phenol 0.5 U 0.5 U 0.5 U 4,400 NA Pyrene 0.5 U 0.5 U 0.5 U 140(S) NA Notes: All results and criteria are presented in µg/l. Bold values display detections. Highlighted values exceed MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria. Italicized values exceed National Primary Drinking Water Regulations (MCLs) µg/l - Microgram per liter (A) - Criterion is MDEQ Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL (AA) - Comparison to criteria may take into account evaluation of if hazardous substances are adsorbed to particulates rather than dissolved in water and if filtered groundwater samples were used to evaluate groundwater ID - Identification J - Estimated concentration (M) - Calculated criterion is below analytical target detection limit,; therefore, the criterion defaults to target detection limit MCL - Maximum contaminant level MDEQ - Michigan Department of Environmental Quality NA - Not available (S) - Criterion defaults to hazardous substance-specific water solubility limit SVOC - Semivolatile organic compound U - Analyte not detected above reporting limit I:\WO\START3\689\41057TBL2-4.XLS 9 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

35 Table 2-5 Analytical Results Summary Table - Dioxins and Furans Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIUM MSB-BAY-PRE-UNF- MSB-BAY-PRE-FIL- MSB-BAY-POS-UNF Water Water Water DATE COLLECTED 7/28/2009 7/28/2009 7/28/2009 Dioxin/Furan (µg/l) MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) 2,3,7,8-TCDD U U U (A,O) ,2,3,7,8-PeCDD U U U NA NA 1,2,3,4,7,8-HxCDD U U U NA NA 1,2,3,6,7,8-HxCDD U U U NA NA 1,2,3,7,8,9-HxCDD U U U NA NA 1,2,3,4,6,7,8-HpCDD U U U NA NA OCDD U U U NA NA 2,3,7,8-TCDF J J J NA NA 1,2,3,7,8-PeCDF J U J NA NA 2,3,4,7,8-PeCDF J U J NA NA 1,2,3,4,7,8-HxCDF U UJ J NA NA 1,2,3,6,7,8-HxCDF U U U NA NA 2,3,4,6,7,8-HxCDF U U U NA NA 1,2,3,7,8,9-HxCDF U U U NA NA 1,2,3,4,6,7,8-HpCDF U U U NA NA 1,2,3,4,7,8,9-HpCDF U U U NA NA OCDF U U U NA NA Total TCDDs U U U NA NA Total PeCDDs U U U NA NA Total HxCDDs U U U NA NA Total HpCDDs U U U NA NA Total TCDFs J J J NA NA Total PeCDFs J U J NA NA Total HxCDFs U U J NA NA Total HpCDFs U U U NA NA I:\WO\START3\689\41057TBL2-5.XLS 10 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

36 Table 2-5 Analytical Results Summary Table - Dioxins and Furans Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan Notes: Detectable concentrations of furans were present in the laboratory method blank; associated results have been qualified accordingly. All results and criteria are presented in µg/l. Bold values display detections. Highlighted values exceed MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria. Italicized values exceed National Primary Drinking Water Regulations (MCLs) µg/l - Microgram per liter (A) - Criterion is MDEQ Drinking Water Standard pursuant to Section 5 of 1976 PA 399, MCL HpCDD - heptachlorodibenzo-p-dioxin HpCDF - heptachlorodibenofuran HxCDD - hexachlorodibenzo-p-dioxin HxCDF - heptachlorodibenzofuran ID - Identification J - Estimated concentration MCL - Maximum contaminant level MDEQ - Michigan Department of Environmental Quality NA - Not available OCDD - ochtachlorodibenzo-p-dioxin OCDF - octachlorodibenzofuran (O) - Generic cleanup criteria are being held at values that MDEQ has used since August 1998 in recognition of the fact that national efforts to reassess risks posed by dioxin are not yet complete PeCDD - pentachlorodibenzo-p-dioxin PeCDF - pentachlorodibenzofuran TCDD - tetrachlorodibenzo-p-dioxin TCDF - tetrachlorodibenzofuran U - Analyte not detected above reporting limit I:\WO\START3\689\41057TBL2-5.XLS 11 of 11 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

37 Table 3-1 Analytical Results Summary Table - Metals Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED MSB-EQUIPMENT-FIL Water 7/29/2009 MDEQ Part 201 Residential & Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) PARAMETERS Total Metals ug/l Aluminum, Total 50 U 50(V) NA Calcium, Total 500 U NA NA Iron, Total 20 U 300(E) NA Magnesium, Total 500 U 400,000 NA Manganese, Total 10 U 50(E) NA Nickel, Total 10 U 100(A) NA Potassium, Total 100 U NA NA Sodium, Total 500 U 120,000 NA Antimony, Total 1 U 6.0(A) 6 Arsenic, Total 1 U 10(A) 10 Barium, Total 1 U 2,000(A) 2,000 Beryllium, Total 1 U 4.0(A) 4 Cadmium, Total 0.2 U 5.0(A) 5 Chromium, Total 0.56 J 100(A) 1,000 Cobalt, Total 1 U 40 NA Copper, Total 1 U 1,000(E) 1,300 Lead, Total 0.34 J 4.0 (L) 15 Selenium, Total 2 U 50(A) 50 Silver, Total 0.2 U 34 NA Thallium, Total 1 U 2.0(A) 2 Vanadium, Total 1 U 4.5 NA Zinc, Total 50 U 2,400 NA Mercury, Total 0.05 J 2.0(A) 2 Cyanide, Total 5 U 200(A) 200 Total Suspended Solids NS NA NA I:\WO\START3\689\41057TBL3-1.XLS 1 of 13 This document shall not be disclosed without express written permission of U.S. EPA 689-2A-AEYL

38 Table 3-1 Analytical Results Summary Table - Metals Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan Notes: All results and criteria are presented in µg/l. Bold values display detections. Highlighted values exceed MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria. Italicized values exceed National Primary Drinking Water Regulations (MCLs) µg/l - Microgram per liter (A) - Criterion is MDEQ Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL (E) - Criterion is aesthetic drinking water value required by Section 20120a(5) of Natural Resources and the Environmental Protection Act, 1994 PA 451, as amended (NREPA) ID - Identification J - Estimated concentration (L) - Criteria for lead derived using a biologically based model as allowed for under Section 20120a(10) of NREPA MCL - Maximum contaminant level MDEQ - Michigan Department of Environmental Quality NA - Not available NS - Analyte not sampled for U - Analyte not detected above reporting limit (V) - Criterion is the aesthetic drinking water value as required by Section 20120(a)(5) of the NREPA. Concentrations up to 200 ug/l may be acceptable, and still allow for drinking water use, as part of a site-specific cleanup under Section 20120a(2) of the NREPA. I:\WO\START3\689\41057TBL3-1.XLS 2 of 13 This document shall not be disclosed without express written permission of U.S. EPA 689-2A-AEYL

39 Table 3-2 Analytical Results Summary Table - Pesticides and PCBs Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED MSB-EQUIPMENT-FIL Water 7/29/2009 MDEQ Part 201 Residential & Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) PARAMETERS Organochlorine Pesticides ug/l 4,4'-DDD 0.1 U 9.1 NA 4,4'-DDE 0.1 U 4.3 NA 4,4'-DDT 0.1 U 3.6 NA Aldrin 0.05 U NA alpha-bhc 0.05 U NA NA alpha-chlordane 0.05 U NA NA beta-bhc 0.05 U NA NA delta-bhc 0.05 U NA NA Dieldrin 0.1 U 0.11 NA Endosulfan I 0.05 U NA NA Endosulfan II 0.1 U NA NA Endosulfan Sulfate 0.1 U NA NA Endrin 0.1 U 2.0(A) 2 Endrin Aldehyde J NA NA Endrin Ketone 0.1 U NA NA gamma-bhc (Lindane) 0.05 U 0.2 (A) 0.2 gamma-chlordane 0.05 U 2.0 (A) 2 Heptachlor 0.05 U 0.4(A) 0.4 Heptachlor Epoxide 0.05 U 0.2(A) 0.2 Methoxychlor 0.5 U 40(A) 40 Toxaphene 5 U 3.0(A) 3 I:\WO\START3\689\41057TBL3-2.XLS 3 of 13 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

40 Table 3-2 Analytical Results Summary Table - Pesticides and PCBs Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED MSB-EQUIPMENT-FIL Water 7/29/2009 MDEQ Part 201 Residential & Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) PARAMETERS Polychlorinated Biphenyls (PCBs) ug/l PCB U 0.5 (A) 0.5 PCB U 0.5 (A) 0.5 PCB U 0.5 (A) 0.5 PCB U 0.5 (A) 0.5 PCB U 0.5 (A) 0.5 PCB U 0.5 (A) 0.5 PCB U 0.5 (A) 0.5 Notes: All results and criteria are presented in µg/l. Bold values display detections. Highlighted values exceed MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria. Italicized values exceed National Primary Drinking Water Regulations (MCLs) µg/l - Microgram per liter (A) - Criterion is MDEQ Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL ID - Identification J - Estimated concentration MCL - Maximum contaminant level MDEQ - Michigan Department of Environmental Quality NA - Not available PCB - Polychlorinated biphenyl U - Analyte not detected above reporting limit I:\WO\START3\689\41057TBL3-2.XLS 4 of 13 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

41 Table 3-3 Analytical Results Summary Table - VOCs Equipment and Trip Blanks Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED MSB- EQUIPMENT- FIL Trip Blank TM2118 Trip Blank TM1577 Water Water Water 7/29/2009 NA NA Trip Blank TM2058 Water NA Trip Blank TM1432 Water NA MDEQ Part 201 Residential & Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) PARAMETERS Volatile Organic Compounds (VOCs) ug/l 1,1,1-Trichloroethane NS 1 U 1 U 1 U 1 U 200(A) 200 1,1,2,2-Tetrachloroethane NS 1 U 1 U 1 U 1 U 8.5 NA 1,1,2-Trichloro-1,2,2-trifluoroethane NS 1 U 1 U 1 U 1 U 170,000(S) NA 1,1,2-Trichloroethane NS 1 U 1 U 1 U 1 U 5.0(A) 5 1,1-Dichloroethane NS 1 U 1 U 1 U 1 U 880 NA 1,1-Dichloroethene NS 1 U 1 U 1 U 1 U 7.0(A) 7 1,2,4-Trichlorobenzene NS 1 U 1 U 1 U 1 U 70(A) 70 1,2-Dibromo-3-chloropropane NS 1 U 1 U 1 U 1 U NA 0.2 1,2-Dibromoethane NS 1 U 1 U 1 U 1 U 0.05 (A) ,2-Dichlorobenzene NS 1 U 1 U 1 U 1 U 600(A) 600 1,2-Dichloroethane NS 1 U 1 U 1 U 1 U 5.0(A) 5 1,2-Dichloropropane NS 1 U 1 U 1 U 1 U 5.0(A) 5 1,3-Dichlorobenzene NS 1 U 1 U 1 U 1 U 6.6 NA 1,4-Dichlorobenzene NS 1 U 1 U 1 U 1 U 75(A) 75 2-Butanone (MEK) NS 5 U 5 U 5 U 5 U 13,000 NA 2-Hexanone NS 5 U 5 U 5 U 5 U 3,000 NA 4-Methyl-2-pentanone (MIBK) NS 5 U 5 U 5 U 5 U 1,800 NA Acetone NS 5 U 5 U 5 U 5 U 730 NA Benzene NS 1 U 1 U 1 U 1 U 5.0(A) 5 Bromodichloromethane NS 1 U 1 U 1 U 1 U 80(A,W) 80a Bromoform NS 1 U 1 U 1 U 1 U 80(A,W) 80a I:\WO\START3\689\41057TBL3-3.XLS 5 of 13 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

42 Table 3-3 Analytical Results Summary Table - VOCs Equipment and Trip Blanks Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED MSB- EQUIPMENT- FIL Trip Blank TM2118 Trip Blank TM1577 Water Water Water 7/29/2009 NA NA Trip Blank TM2058 Water NA Trip Blank TM1432 Water NA MDEQ Part 201 Residential & Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) PARAMETERS Volatile Organic Compounds (VOCs) ug/l Bromomethane NS 1 U 1 U 1 U 1 U 10 NA Carbon Disulfide NS 5 U 5 U 5 U 5 U 800 NA Carbon Tetrachloride NS 1 U 1 U 1 U 1 U 5.0(A) 5 Chlorobenzene NS 1 U 1 U 1 U 1 U 100(A) 100 Chloroethane NS 1 U 1 U 1 U 1 U 430 NA Chloroform NS 1 U 1 U 1 U 1 U 80(A,W) 80a Chloromethane NS 0.14 J 0.17 J 1U 1U 260 NA cis-1,2-dichloroethene NS 1 U 1 U 1 U 1 U 70(A) 70 cis-1,3-dichloropropene NS 1 U 1 U 1 U 1 U NA NA Cyclohexane NS 5 U 5 U 5 U 5 U NA NA Dibromochloromethane NS 1 U 1 U 1 U 1 U 80(A,W) 80a Dichlorodifluoromethane NS 1 U 1 U 1 U 1 U 1,700 NA Ethylbenzene NS 1 U 1 U 1 U 1 U 74(E) 700 Isopropylbenzene NS 1 U 1 U 1 U 1 U 800 NA Methyl Acetate NS 5 U 5 U 5 U 5 U NA NA Methyl tert-butyl Ether NS 1 U 1 U 1 U 1 U 40(E) NA Methylcyclohexane NS 5 U 5 U 5 U 5 U NA NA Methylene Chloride NS 1 U 1 U 1 U 1 U 5.0(A) 5 Styrene NS 1 U 1 U 1 U 1 U 100(A) 100 Tetrachloroethene NS 1 U 1 U 1 U 1 U 5.0(A) 5 Toluene NS 1 U 1 U 1 U 1 U 790(E) 1,000 I:\WO\START3\689\41057TBL3-3.XLS 6 of 13 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

43 Table 3-3 Analytical Results Summary Table - VOCs Equipment and Trip Blanks Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED MSB- EQUIPMENT- FIL Trip Blank TM2118 Trip Blank TM1577 Water Water Water 7/29/2009 NA NA Trip Blank TM2058 Water NA Trip Blank TM1432 Water NA MDEQ Part 201 Residential & Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) PARAMETERS Volatile Organic Compounds (VOCs) ug/l trans-1,2-dichloroethene NS 1 U 1 U 1 U 1 U 100(A) 100 trans-1,3-dichloropropene NS 1 U 1 U 1 U 1 U NA NA Trichloroethene NS 1 U 1 U 1 U 1 U 5.0(A) 5 Trichlorofluoromethane NS 1 U 1 U 1 U 1 U 2,600 NA Vinyl Chloride NS 1 U 1 U 1 U 1 U 2.0(A) 2 Xylene (Total) NS 3 U 3 U 3 U 3 U 280(E) 10,000 Notes: All results and criteria are presented in µg/l. Bold values display detections. Highlighted values exceed MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria. Italicized values exceed National Primary Drinking Water Regulations (MCLs) µg/l - Microgram per liter (A) - Criterion is MDEQ Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL (E) - Criterion is aesthetic drinking water value required by Section 20120a(5) of Natural Resources and the Environmental Protection Act, 1994 PA 451, as amended (NREPA) ID - Identification J - Estimated concentration MCL - Maximum contaminant level MDEQ - Michigan Department of Environmental Quality NA - Not available (S) - Criterion defaults to hazardous substance-specific water solubility limit U - Analyte not detected above reporting limit VOC - Volatile organic compound (W) - Concentration of trihalomethanes in groundwater shall be added together to determine compliance with the MDEQ drinking water standard of 80 µg/l a The MCL is the total concentration of trihalomethanes I:\WO\START3\689\41057TBL3-3.XLS 7 of 13 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

44 Table 3-4 Analytical Results Summary Table - SVOCs Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED MSB-EQUIPMENT-FIL Water 7/29/2009 MDEQ Part 201 Residential & Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) PARAMETERS Semi Volatile Organic Compounds (SVOCs) ug/l 1,1'-Biphenyl 0.5 U NA NA 2,4,5-Trichlorophenol 0.5 U 730 NA 2,4,6-Trichlorophenol 0.5 U 120 NA 2,4-Dichlorophenol 0.5 U 73 NA 2,4-Dimethylphenol 1 U 370 NA 2,4-Dinitrophenol 5 U NA NA 2,4-Dinitrotoluene 0.5 U 7.7 NA 2,6-Dinitrotoluene 0.5 U NA NA 2-Chloronaphthalene 0.5 U NA NA 2-Chlorophenol 0.5 U 45 NA 2-Methylnaphthalene 0.5 U 260 NA 2-Methylphenol 0.5 U NA NA 2-Nitroaniline 1 U NA NA 2-Nitrophenol 0.5 U 20 NA 3,3 -Dichlorobenzidine 1 U 1.1 NA 3-Nitroaniline 1 U NA NA 4,6-Dinitro-2-methylphenol 0.5 U NA NA 4-Bromophenyl Phenyl Ether 0.5 U NA NA 4-Chloro-3-methylphenol 0.5 U 150 NA 4-Chloroaniline 1 U NA NA I:\WO\START3\689\41057TBL3-4.XLS 8 of 13 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

45 Table 3-4 Analytical Results Summary Table - SVOCs Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED MSB-EQUIPMENT-FIL Water 7/29/2009 MDEQ Part 201 Residential & Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) PARAMETERS Semi Volatile Organic Compounds (SVOCs) ug/l 4-Chlorophenyl Phenyl Ether 0.5 U NA NA 4-Methylphenol 0.5 U NA NA 4-Nitroaniline 1 U NA NA 4-Nitrophenol 5 U NA NA Acenaphthene 0.5 U 1,300 NA Acenaphthylene 0.5 U 52 NA Acetophenone J 1,500 NA Anthracene 0.5 U 43(S) NA Atrazine 0.5 U 3.0(A) 3 Benzaldehyde 0.5 U NA NA Benzo(a)anthracene 0.5 U 2.1 NA Benzo(a)pyrene 0.2 U 5.0(A) 0.2 Benzo(b)fluoranthene 0.5 U 1.5(S,AA) NA Benzo(g,h,i)perylene 0.5 U 1.0(M); 0.26(S) NA Benzo(k)fluoranthene 0.5 U 1.0(M); 0.8(S) NA Bis(2-chloroethoxy)methane 0.5 U NA NA Bis(2-chloroethyl) Ether 0.5 U 2 NA Bis(2-chloroisopropyl) Ether 0.5 U NA NA Bis(2-ethylhexyl) Phthalate 0.5 U 6.0(A) 6 I:\WO\START3\689\41057TBL3-4.XLS 9 of 13 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

46 Table 3-4 Analytical Results Summary Table - SVOCs Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED MSB-EQUIPMENT-FIL Water 7/29/2009 MDEQ Part 201 Residential & Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) PARAMETERS Semi Volatile Organic Compounds (SVOCs) ug/l Butyl Benzyl Phthalate J 1,200 NA Caprolactam 1 UJ 5,800 NA Carbazole 0.5 U 85 NA Chrysene 0.5 U 1.6(S) NA Di-n-butyl Phthalate 0.33 J 880 NA Di-n-octyl Phthalate 0.5 U 130 NA Dibenz(a,h)anthracene 0.5 U 2.0(M); 0.21 NA Dibenzofuran 0.5 U ID NA Diethyl Phthalate 0.5 U 5,500 NA Dimethyl Phthalate 0.5 U 73,000 NA Fluoranthene 0.5 U 210(S) NA Fluorene 0.5 U 880 NA Hexachlorobenzene 0.5 U 1.0(A) 1 Hexachlorobutadiene 0.5 U 15 NA Hexachlorocyclopentadiene 0.5 U 50(A) 50 Hexachloroethane 0.5 U 7.3 NA Indeno(1,2,3-cd)pyrene 0.5 U 2.0(M); 0022(S) NA Isophorone 0.5 U 770 NA N-Nitroso-di-n-propylamine 0.5 U 5.0(M); 0.19 NA N-Nitroso-diphenylamine 0.5 U 270 NA I:\WO\START3\689\41057TBL3-4.XLS 10 of 13 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

47 Table 3-4 Analytical Results Summary Table - SVOCs Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED MSB-EQUIPMENT-FIL Water 7/29/2009 MDEQ Part 201 Residential & Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) PARAMETERS Semi Volatile Organic Compounds (SVOCs) ug/l Naphthalene 0.5 U 520 NA Nitrobenzene 0.5 U 3.4 NA Pentachlorophenol 0.5 U 1.0(A) 1 Phenanthrene 0.5 U 52 NA Phenol 0.5 U 4,400 NA Pyrene 0.5 U 140(S) NA Notes: All results and criteria are presented in µg/l. Bold values display detections. Highlighted values exceed MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria. Italicized values exceed National Primary Drinking Water Regulations (MCLs) µg/l - Microgram per liter (A) - Criterion is MDEQ Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL (AA) - Comparison to criteria may take into account evaluation of if hazardous substances are adsorbed to particulates rather than dissolved in water and if filtered groundwater samples were used to evaluate groundwater ID - Identification or insufficient data J - Estimated concentration (M) - Calculated criterion is below analytical target detection limit,; therefore, the criterion defaults to target detection limit MCL - Maximum contaminant level MDEQ - Michigan Department of Environmental Quality NA - Not available (S) - Criterion defaults to hazardous substance-specific water solubility limit SVOC - Semivolatile organic compound U - Analyte not detected above reporting limit I:\WO\START3\689\41057TBL3-4.XLS 11 of 13 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

48 SAMPLE ID SAMPLE MEDIUM Table 3-5 Analytical Results Summary Table - Dioxins and Furans Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-EQUIPMENT-FIL Water DATE COLLECTED 7/29/2009 MDEQ Part 201 Residential and Commercial 1 Drinking Water National Primary Drinking Water Regulations (MCLs) Dioxin/Furan (µg/l) 2,3,7,8-TCDD U (A,O) ,2,3,7,8-PeCDD U NA NA 1,2,3,4,7,8-HxCDD U NA NA 1,2,3,6,7,8-HxCDD U NA NA 1,2,3,7,8,9-HxCDD U NA NA 1,2,3,4,6,7,8-HpCDD U NA NA OCDD U NA NA 2,3,7,8-TCDF J NA NA 1,2,3,7,8-PeCDF J NA NA 2,3,4,7,8-PeCDF J NA NA 1,2,3,4,7,8-HxCDF U NA NA 1,2,3,6,7,8-HxCDF U NA NA 2,3,4,6,7,8-HxCDF U NA NA 1,2,3,7,8,9-HxCDF U NA NA 1,2,3,4,6,7,8-HpCDF U NA NA 1,2,3,4,7,8,9-HpCDF U NA NA OCDF U NA NA Total TCDDs U NA NA Total PeCDDs U NA NA Total HxCDDs U NA NA Total HpCDDs U NA NA Total TCDFs J NA NA Total PeCDFs J NA NA Total HxCDFs U NA NA Total HpCDFs U NA NA I:\WO\START3\689\41057TBL3-5.XLS 12 of 13 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

49 Table 3-5 Analytical Results Summary Table - Dioxins and Furans Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan Notes: Detectable concentrations of furans were present in the laboratory method blank; associated results have been qualified accordingly. All results and criteria are presented in µg/l. Bold values display detections. Highlighted values exceed MDEQ Part 201 Residential and Commercial 1 Drinking Water Criteria. Italicized values exceed National Primary Drinking Water Regulations (MCLs) µg/l - Microgram per liter (A) - Criterion is MDEQ Drinking Water Standard pursuant to Section 5 of 1976 PA 399, MCL HpCDD - heptachlorodibenzo-p-dioxin HpCDF - heptachlorodibenofuran HxCDD - hexachlorodibenzo-p-dioxin HxCDF - heptachlorodibenzofuran ID - Identification J - Estimated concentration MCL - Maximum contaminant level MDEQ - Michigan Department of Environmental Quality NA - Not available OCDD - ochtachlorodibenzo-p-dioxin OCDF - octachlorodibenzofuran (O) - Generic cleanup criteria are being held at values that MDEQ has used since August 1998 in recognition of the fact that national efforts to reassess risks posed by dioxin are not yet complete PeCDD - pentachlorodibenzo-p-dioxin PeCDF - pentachlorodibenzofuran TCDD - tetrachlorodibenzo-p-dioxin TCDF - tetrachlorodibenzofuran U - Analyte not detected above reporting limit I:\WO\START3\689\41057TBL3-5.XLS 13 of 13 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AEYL

50 Table 4 Water Quality Report Data Comparison Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan LOCATION SAMPLING EVENT REPORT DATE MIDLAND SAGINAW MIDLAND a POST TREATMENT SAGINAW b POST TREATMENT BAY CITY c BAY CITY POST TREATMENT Annual Water Supply Annual Water Supply Annual Water Supply National Primary Drinking Water Regulations (MCLs) PARAMETERS Iron, Total J ND NA Sodium, Total NA Arsenic, Total - ND ND ND - ND 10 Barium, Total Copper, Total Lead, Total 11 ND J J 15 Selenium, Total 2 ND 2 ND - ND 50 Bromodichloromethane d Bromoform - ND - ND - ND 80 d Chloroform d Dibromochloromethane d Total Trihalomethans d 1,1,1-Trichloroethane - ND ND ND - ND 200 1,1,2,2-Tetrachloroethane - ND ND ND - ND NA 1,1,2-Trichloroethane - ND ND ND - ND 5 1,1-Dichloroethane - ND ND ND - ND NA 1,1-Dichloroethene - ND ND ND - ND 7 1,2,4-Trichlorobenzene - ND ND ND - ND 70 1,2-Dichlorobenzene - ND ND ND - ND 600 1,2-Dichloroethane - ND ND ND - ND 5 1,2-Dichloropropane - ND ND ND - ND 5 1,3-Dichlorobenzene - ND ND ND - ND NA 1,4-Dichlorobenzene - ND ND ND - ND 75 2-Butanone (MEK) - ND ND ND - ND NA 4-Methyl-2-pentanone (MIBK) - ND ND ND - ND NA Benzene - ND ND ND - ND 5 Bromomethane - ND ND ND - ND NA Carbon Tetrachloride - ND ND ND - ND 5 Chlorobenzene - ND ND ND - ND 100 Chloroethane - ND ND ND - ND NA Chloromethane J ND 0.29 J J NA cis-1,2-dichloroethene - ND ND ND - ND 70 cis-1,3-dichloropropene - ND ND ND - ND NA Dichlorodifluoromethane - ND ND ND - ND NA Ethylbenzene - ND ND ND - ND 700 Isopropylbenzene - ND ND ND - ND NA Methyl tert-butyl Ether - ND ND ND - ND NA Toluene - ND ND ND - ND 1000 trans-1,2-dichloroethene - ND ND ND - ND 100 I:\WO\START3\689\41057TBL4.XLS 1 of 2 This document shall not be disclosed without the express written permission of U.S. EPA A-AEYL

51 Table 4 Water Quality Report Data Comparison Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan LOCATION SAMPLING EVENT REPORT DATE PARAMETERS MIDLAND SAGINAW MIDLAND a POST TREATMENT SAGINAW b POST TREATMENT BAY CITY c BAY CITY POST TREATMENT Annual Water Supply Annual Water Supply Annual Water Supply National Primary Drinking Water Regulations (MCLs) trans-1,3-dichloropropene - ND ND ND - ND NA Trichloroethene - ND ND ND - ND 5 Vinyl Chloride - ND ND ND - ND 2 Xylene (Total) - ND ND ND - ND Hexachlorobutadiene - ND ND ND - ND NA Naphthalene - ND ND ND - ND NA Nitrobenzene - ND ND ND - ND NA Notes: All results and criteria are presented in µg/l. Bold values display detections. Italicized values exceed National Primary Drinking Water Regulations (MCLs) - - Not reported in drinking water report µg/l - Microgram per liter J - Estimated concentration MCL - Maximum contaminant level NA - Not available ND - Not detected a Midland 2008 Drinking Water Report values are the average values for barium and selenium, the 90th percentile values for copper and lead, and the running annual average (RAA) for total trihalomethanes. b Saginaw 2008 Drinking Water Report values are either the average reported value or, in the case of copper and lead, the maximum reported value. c Bay City 2008 Drinking Water Report values are the average values for sodium, bromodichloromethane, and dibromochloromethane, the 90th percentile values for copper and lead, and the Highest Running Annual Average (RAA) values for chloroform and total trihalomethanes. d The MCL is the total concentration of trihalomethanes I:\WO\START3\689\41057TBL4.XLS 2 of 2 This document shall not be disclosed without the express written permission of U.S. EPA A-AEYL

52 ATTACHMENT C 2010 DATA SUMMARY TABLES

53 Table 1-1 Analytical Results Summary Table - Metals Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIUM MSB-WSP-PRE- UNF Water MSB-WSP-PRE- UNF D Water MSB-WSP-PRE- FIL Water MSB-SAG-POS- UNF MSB-MID-POS- UNF MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) DATE COLLECTED 5/27/10 5/27/10 5/27/10 5/26/10 5/26/10 Total Metals (µg/l) Aluminum, Total 50 U 50 U 50 U 50 U 50 U 50(V) NA Calcium, Total 25,000 25,000 25,000 27,000 27,000 NA NA Iron, Total J 20 U 15 J 5.1 J 300(E) NA Magnesium, Total 7,100 7,100 7,200 7,100 7, ,000 NA Manganese, Total 10 U 10 U 10 U 10 U 10 U 50(E) NA Nickel, Total 10 U 10 U 10 U 10 U 10 U 100(A) NA Potassium, Total NA NA Sodium, Total 4,200 4,300 4,300 4,900 4, ,000 NA Antimony, Total 1.0 U 1.0 U 0.37 J 1.0 U 1.0 U 6.0(A) 6 Arsenic, Total 0.46 J 0.60 J 0.57 J 1.0 U 1.0 U 10(A) 10 Barium, Total ,000(A) 2,000 Beryllium, Total 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 4.0(A) 4 Cadmium, Total 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 5.0(A) 5 Chromium, Total 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 100(A) 1,000 Cobalt, Total 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 40 NA Copper, Total ,000(E) 1,300 Lead, Total 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 4.0 (L) 15 Selenium, Total 2.0 U 2.0 U 2.0 U 2.0 U 2.0 U 50(A) 50 Silver, Total 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 34 NA Thallium, Total 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 2.0(A) 2 Vanadium, Total 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 4.5 NA Zinc, Total 5.7 J 4.9 J 9.3 J 4.5 J 6.7 J 2,400 NA Mercury, Total 0.20 U 0.20 U J 0.20 U 0.20 U 2.0(A) 2 Cyanide, Total 5.00 U 5.00 U 5.00 U 5.00 U 5.00 U 200(A) 200 Total Suspended Solids (mg/l) 3.3 U 3.3 U NS NS NS NA NA Water Water I:\WO\START3\689\42396TBL1-1.XLS 1 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

54 Table 1-1 Analytical Results Summary Table - Metals Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan Notes: All results and criteria are presented in µg/l except where noted. Bold values display detections. µg/l - Microgram per liter mg/l - Milligram per liter (A) - Criterion is MDNRE Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL (E) - Criterion is aesthetic drinking water value required by Section 20120a(5) of Natural Resources and the Environmental Protection Act, 1994 PA 451, as amended (NREPA) ID - Identification J - Estimated concentration (L) - Criteria for lead derived using a biologically based model as allowed for under Section 20120a(10) of NREPA MCL - Maximum contaminant level MDNRE - Michigan Department of Natural Resources and Environment NA - Not available NS - Analyte not sampled for U - Analyte not detected above reporting limit (V) - Criterion is the aesthetic drinking water value as required by Section 20120(a)(5) of the NREPA. Concentrations up to 200 ug/l may be acceptable, and still allow for drinking water use, as part of a site-specific cleanup under Section 20120a(2) of the NREPA. I:\WO\START3\689\42396TBL1-1.XLS 2 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

55 Table 1-2 Analytical Results Summary Table - Pesticides and PCBs Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIUM DATE COLLECTED MSB-WSP-PRE- UNF Water 5/27/10 MSB-WSP-PRE- UNF D Water MSB-WSP-PRE- FIL Water MSB-SAG-POS- UNF Water MSB-MID-POS- UNF Water 5/27/10 5/27/10 5/26/10 5/26/10 MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) Organochlorine Pesticides (µg/l) 4,4'-DDD 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 9.1 NA 4,4'-DDE 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 4.3 NA 4,4'-DDT 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 3.6 NA Aldrin 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U NA alpha-bhc 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U NA NA alpha-chlordane 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U NA NA beta-bhc 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U NA NA delta-bhc 0.05 U 0.05 U 0.05 U J J NA NA Dieldrin 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 0.11 NA Endosulfan I 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U NA NA Endosulfan II 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U NA NA Endosulfan Sulfate 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U NA NA Endrin 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U 2.0(A) 2 Endrin Aldehyde 0.1 U J 0.1 U 0.1 U 0.1 U NA NA Endrin Ketone 0.1 U 0.1 U 0.1 U 0.1 U 0.1 U NA NA gamma-bhc (Lindane) 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U 0.2 (A) 0.2 gamma-chlordane 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U 2.0 (A) 2 Heptachlor 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U 0.4(A) 0.4 Heptachlor Epoxide 0.05 U 0.05 U 0.05 U 0.05 U 0.05 U 0.2(A) 0.2 Methoxychlor 0.5 UJ 0.5 UJ 0.5 UJ 0.5 UJ 0.5 UJ 40(A) 40 Toxaphene 5 U 5 U 5 U 5 U 5 U 3.0(A) 3 I:\WO\START3\689\42396TBL1-2.XLS 1 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

56 Table 1-2 Analytical Results Summary Table - Pesticides and PCBs Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIUM MSB-WSP-PRE- UNF Water MSB-WSP-PRE- UNF D Water MSB-WSP-PRE- FIL Water MSB-SAG-POS- UNF Water MSB-MID-POS- UNF Water MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) DATE COLLECTED 5/27/10 5/27/10 5/27/10 5/26/10 5/26/10 PCBs (µg/l) PCB U 0.20 U 0.20 U 0.20 U 0.20 U 0.5 (A) 0.5 PCB U 0.20 U 0.20 U 0.20 U 0.20 U 0.5 (A) 0.5 PCB U 0.20 U 0.20 U 0.20 U 0.20 U 0.5 (A) 0.5 PCB U 0.20 U 0.20 U 0.20 U 0.20 U 0.5 (A) 0.5 PCB U 0.20 U 0.20 U 0.20 U 0.20 U 0.5 (A) 0.5 PCB U 0.20 U 0.20 U 0.20 U 0.20 U 0.5 (A) 0.5 PCB U 0.20 U 0.20 U 0.20 U 0.20 U 0.5 (A) 0.5 Notes: All results and criteria are presented in µg/l. Bold values display detections. µg/l - Microgram per liter (A) - Criterion is MDNRE Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL ID - Identification J - Estimated concentration MCL - Maximum contaminant level MDNRE - Michigan Department of Natural Resources and Environment NA - Not available PCB - Polychlorinated biphenyl U - Analyte not detected above reporting limit I:\WO\START3\689\42396TBL1-2.XLS 2 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

57 SAMPLE ID SAMPLE MEDIUM DATE COLLECTED Table 1-3 Analytical Results Summary Table - VOCs Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-WSP-PRE- UNF D Water MSB-WSP-PRE- UNF Water MSB-SAG-POS- UNF Water MSB-MID-POS- UNF Water 5/27/2010 5/27/2010 5/26/2010 5/26/2010 MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) VOCs (µg/l) 1,1,1-Trichloroethane 1.0 U 1.0 U 1.0 U 1.0 U 200(A) 200 1,1,2,2-Tetrachloroethane 1.0 U 1.0 U 1.0 U 1.0 U 8.5 NA 1,1,2-Trichloro-1,2,2-trifluoroethane 1.0 U 1.0 U 1.0 U 1.0 U 170,000(S) NA 1,1,2-Trichloroethane 1.0 U 1.0 U 1.0 U 1.0 U 5.0(A) 5 1,1-Dichloroethane 1.0 U 1.0 U 1.0 U 1.0 U 880 NA 1,1-Dichloroethene 1.0 U 1.0 U 1.0 U 1.0 U 7.0(A) 7 1,2,4-Trichlorobenzene 1.0 U 1.0 U 1.0 U 1.0 U 70(A) 70 1,2-Dibromo-3-chloropropane 1.0 U 1.0 U 1.0 U 1.0 U NA 0.2 1,2-Dibromoethane 1.0 U 1.0 U 1.0 U 1.0 U 0.05 (A) ,2-Dichlorobenzene 1.0 U 1.0 U 1.0 U 1.0 U 600(A) 600 1,2-Dichloroethane 1.0 U 1.0 U 1.0 U 1.0 U 5.0(A) 5 1,2-Dichloropropane 1.0 U 1.0 U 1.0 U 1.0 U 5.0(A) 5 1,3-Dichlorobenzene 1.0 U 1.0 U 1.0 U 1.0 U 6.6 NA 1,4-Dichlorobenzene 1.0 U 1.0 U 1.0 U 1.0 U 75(A) 75 2-Butanone (MEK) 5.0 U 5.0 U 5.0 U 5.0 U 13,000 NA 2-Hexanone 5.0 U 5.0 U 5.0 U 5.0 U 3,000 NA 4-Methyl-2-pentanone (MIBK) 5.0 U 5.0 U 5.0 U 5.0 U 1,800 NA Acetone 5.0 U 3.5 J 5.0 U 3.4 J 730 NA Benzene 1.0 U 1.0 U 1.0 U 1.0 U 5.0(A) 5 Bromodichloromethane 1.0 U 1.0 U (A,W) 80a Bromoform 1.0 U 1.0 U 1.0 U 1.0 U 80(A,W) 80a Bromomethane 1.0 U 1.0 U 1.0 U 1.0 U 10 NA Carbon Disulfide 5.0 U 5.0 U 5.0 U 5.0 U 800 NA Carbon Tetrachloride 1.0 U 1.0 U 1.0 U 1.0 U 5.0(A) 5 Chlorobenzene 1.0 U 1.0 U 1.0 U 1.0 U 100(A) 100 Chloroethane 1.0 U 1.0 U 1.0 U 1.0 U 430 NA Chloroform 1.0 U 1.0 U (A,W) 80a Chloromethane 1.0 U 1.0 U 1.0 U 1.0 U 260 NA cis-1,2-dichloroethene 1.0 U 1.0 U 1.0 U 1.0 U 70(A) 70 cis-1,3-dichloropropene 1.0 U 1.0 U 1.0 U 1.0 U NA NA Cyclohexane 5.0 U 5.0 U 5.0 U 5.0 U NA NA Dibromochloromethane 1.0 U 1.0 U (A,W) 80a I:\WO\START3\689\42396TBL1-3.XLS 1 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

58 SAMPLE ID SAMPLE MEDIUM Table 1-3 Analytical Results Summary Table - VOCs Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-WSP-PRE- UNF D Water MSB-WSP-PRE- UNF Water MSB-SAG-POS- UNF Water MSB-MID-POS- UNF Water MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) DATE COLLECTED 5/27/2010 5/27/2010 5/26/2010 5/26/2010 VOCs (µg/l) Dichlorodifluoromethane 1.0 U 1.0 U 1.0 U 1.0 U 1,700 NA Ethylbenzene 1.0 U 1.0 U 1.0 U 1.0 U 74(E) 700 Isopropylbenzene 1.0 U 1.0 U 1.0 U 1.0 U 800 NA Methyl Acetate 5.0 U 5.0 U 5.0 U 5.0 U NA NA Methyl tert-butyl Ether 1.0 U 1.0 U 1.0 U 1.0 U 40(E) NA Methylcyclohexane 5.0 U 5.0 U 5.0 U 5.0 U NA NA Methylene Chloride 1.0 U 1.0 U 1.0 U 1.0 U 5.0(A) NA Styrene 1.0 U 1.0 U 1.0 U 1.0 U 100(A) 100 Tetrachloroethene 1.0 U 1.0 U 1.0 U 1.0 U 5.0(A) 5 Toluene 1.0 U 1.0 U 1.0 U 1.0 U 790(E) 1,000 trans-1,2-dichloroethene 1.0 U 1.0 U 1.0 U 1.0 U 100(A) 100 trans-1,3-dichloropropene 1.0 U 1.0 U 1.0 U 1.0 U NA NA Trichloroethene 1.0 U 1.0 U 1.0 U 1.0 U 5.0(A) 5 Trichlorofluoromethane 1.0 U 1.0 U 1.0 U 1.0 U 2,600 NA Vinyl Chloride 1.0 U 1.0 U 1.0 U 1.0 U 2.0(A) 2 Xylene (Total) 3.0 U 3.0 U 3.0 U 3.0 U 280(E) 10,000 Notes: All results and criteria are presented in µg/l. Bold values display detections. µg/l - Microgram per liter (A) - Criterion is MDNRE Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL (E) - Criterion is aesthetic drinking water value required by Section 20120a(5) of Natural Resources and the Environmental Protection Act, 1994 PA 451, as amended (NREPA) ID - Identification J - Estimated concentration MCL - Maximum contaminant level MDNRE - Michigan Department of Natural Resources and Environment NA - Not available (S) - Criterion defaults to hazardous substance-specific water solubility limit U - Analyte not detected above reporting limit VOC - Volatile organic compound (W) - Concentration of trihalomethanes in groundwater shall be added together to determine compliance with the MDNRE drinking water standard of 80 µg/l a The MCL is the total concentration of trihalomethanes I:\WO\START3\689\42396TBL1-3.XLS 2 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

59 SAMPLE ID SAMPLE MEDIUM Table 1-4 Analytical Results Summary Table - SVOCs Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-WSP-PRE- MSB-WSP-PRE- MSB-WSP-PRE- MSB-SAG-POS- MSB-MID-POS- UNF UNF D FIL UNF UNF Water Water Water Water Water DATE COLLECTED 5/27/2010 5/27/2010 5/27/2010 5/26/2010 5/26/2010 MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) SVOCs (µg/l) 1,1'-Biphenyl 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U NA NA 2,4,5-Trichlorophenol 0.50 UJ 0.50 UJ 0.50 UJ 0.50 UJ 0.50 UJ 730 NA 2,4,6-Trichlorophenol 0.50 UJ 0.50 UJ 0.50 UJ 0.50 UJ 0.50 UJ 120 NA 2,4-Dichlorophenol 0.50 UJ 0.50 U 0.50 UJ 0.50 UJ 0.50 UJ 73 NA 2,4-Dimethylphenol 1.0 UJ 1.0 U 1.0 UJ 1.0 UJ 1.0 UJ 370 NA 2,4-Dinitrophenol 5.0 UJ 5.0 U 5.0 UJ 5.0 UJ 5.0 UJ NA NA 2,4-Dinitrotoluene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 7.7 NA 2,6-Dinitrotoluene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U NA NA 2-Chloronaphthalene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U NA NA 2-Chlorophenol 0.50 UJ 0.50 U 0.50 UJ 0.50 UJ 0.50 UJ 45 NA 2-Methylnaphthalene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 260 NA 2-Methylphenol 0.50 UJ 0.50 U 0.50 UJ 0.50 UJ 0.50 UJ NA NA 2-Nitroaniline 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U NA NA 2-Nitrophenol 0.50 UJ 0.50 U 0.50 UJ 0.50 UJ 0.50 U 20 NA 3,3 -Dichlorobenzidine 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.1 NA 3-Nitroaniline 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U NA NA 4,6-Dinitro-2-methylphenol 0.50 UJ 0.50 U 0.50 UJ 0.50 UJ 0.50 UJ NA NA 4-Bromophenyl Phenyl Ether 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U NA NA 4-Chloro-3-methylphenol 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 150 NA 4-Chloroaniline 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U NA NA 4-Chlorophenyl Phenyl Ether 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U NA NA 4-Methylphenol 0.50 UJ 0.50 U 0.50 UJ 0.50 UJ 0.50 UJ NA NA 4-Nitroaniline 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U NA NA 4-Nitrophenol 5.0 UJ 5.0 U 5.0 UJ 5.0 UJ 5.0 U NA NA Acenaphthene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 1,300 NA Acenaphthylene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 52 NA Acetophenone 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 1,500 NA Anthracene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 43(S) NA I:\WO\START3\689\42396TBL1-4.XLS 1 of 3 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

60 SAMPLE ID SAMPLE MEDIUM Table 1-4 Analytical Results Summary Table - SVOCs Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-WSP-PRE- MSB-WSP-PRE- MSB-WSP-PRE- MSB-SAG-POS- MSB-MID-POS- UNF UNF D FIL UNF UNF Water Water Water Water Water MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) DATE COLLECTED 5/27/2010 5/27/2010 5/27/2010 5/26/2010 5/26/2010 SVOCs (µg/l) Atrazine 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 3.0(A) 3 Benzaldehyde 0.50 U 0.50 U 0.50 U 0.24 J 0.30 J NA NA Benzo(a)anthracene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 2.1 NA Benzo(a)pyrene 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 5.0(A) 0.2 Benzo(b)fluoranthene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 1.5(S,AA) NA Benzo(g,h,i)perylene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 1.0(M); 0.26(S) NA Benzo(k)fluoranthene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 1.0(M); 0.8(S) NA Bis(2-chloroethoxy)methane 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U NA NA Bis(2-chloroethyl) Ether 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 2 NA Bis(2-chloroisopropyl) Ether 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U NA NA Bis(2-ethylhexyl) Phthalate 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 6.0(A) 6 Butyl Benzyl Phthalate 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1,200 NA Caprolactam 1.0 UJ 1.0 UJ 1.0 UJ 1.0 UJ 1.0 UJ 5,800 NA Carbazole 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 85 NA Chrysene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 1.6(S) NA Di-n-butyl Phthalate 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 880 NA Di-n-octyl Phthalate 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 130 NA Dibenz(a,h)anthracene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 2.0(M); 0.21 NA Dibenzofuran 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U ID NA Diethyl Phthalate 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 5,500 NA Dimethyl Phthalate 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 73,000 NA Fluoranthene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 210(S) NA Fluorene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 880 NA Hexachlorobenzene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 1.0(A) 1 Hexachlorobutadiene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 15 NA Hexachlorocyclopentadiene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 50(A) 50 Hexachloroethane 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 7.3 NA I:\WO\START3\689\42396TBL1-4.XLS 2 of 3 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

61 SAMPLE ID SAMPLE MEDIUM Table 1-4 Analytical Results Summary Table - SVOCs Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-WSP-PRE- MSB-WSP-PRE- MSB-WSP-PRE- MSB-SAG-POS- MSB-MID-POS- UNF UNF D FIL UNF UNF Water Water Water Water Water MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) DATE COLLECTED 5/27/2010 5/27/2010 5/27/2010 5/26/2010 5/26/2010 SVOCs (µg/l) Indeno(1,2,3-cd)pyrene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 2.0(M); 0022(S) NA Isophorone 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 770 NA N-Nitroso-di-n-propylamine 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 5.0(M); 0.19 NA N-Nitroso-diphenylamine 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 270 NA Naphthalene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 520 NA Nitrobenzene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 3.4 NA Pentachlorophenol 0.50 UJ 0.50 U 0.50 UJ 0.50 UJ 0.50 UJ 1.0(A) 1 Phenanthrene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 52 NA Phenol 0.50 UJ 0.50 UJ 0.50 UJ 0.50 UJ 0.50 UJ 4,400 NA Pyrene 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 140(S) NA Notes: All results and criteria are presented in µg/l. Bold values display detections. µg/l - Microgram per liter (A) - Criterion is MDNRE Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL (AA) - Comparison to criteria may take into account evaluation of if hazardous substances are adsorbed to particulates rather than dissolved in water and if filtered groundwater samples were used to evaluate groundwater ID - Identification or insufficient data J - Estimated concentration (M) - Calculated criterion is below analytical target detection limit,; therefore, the criterion defaults to target detection limit MCL - Maximum contaminant level MDNRE - Michigan Department of Natural Resources and Environment NA - Not available (S) - Criterion defaults to hazardous substance-specific water solubility limit SVOC - Semivolatile organic compound U - Analyte not detected above reporting limit I:\WO\START3\689\42396TBL1-4.XLS 3 of 3 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

62 Table 1-5 Analytical Results Summary Table - Dioxins and Furans Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIUM DATE COLLECTED 5/27/2010 MSB-WSP-PRE-FIL Water MSB-WSP-PRE- UNF D Water 5/27/2010 MSB-SAG-POS-UNF Water 5/27/2010 MSB-MID-POS-UNF Water MSB-WSP-PRE- UNF Water 5/26/2010 5/26/2010 MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) Dioxin/Furan (µg/l) 2,3,7,8-TCDD U U U U U (A,O) ,2,3,7,8-PeCDD U U U U U NA NA 1,2,3,4,7,8-HxCDD U U U U U NA NA 1,2,3,6,7,8-HxCDD U U U U U NA NA 1,2,3,7,8,9-HxCDD U U U U U NA NA 1,2,3,4,6,7,8-HpCDD U U U U U NA NA OCDD U U U U U NA NA 2,3,7,8-TCDF U U U U U NA NA 1,2,3,7,8-PeCDF U U U U U NA NA 2,3,4,7,8-PeCDF U U U U U NA NA 1,2,3,4,7,8-HxCDF U U U U U NA NA 1,2,3,6,7,8-HxCDF U U U U U NA NA 2,3,4,6,7,8-HxCDF U U U U U NA NA 1,2,3,7,8,9-HxCDF U U U U U NA NA 1,2,3,4,6,7,8-HpCDF U U U U U NA NA 1,2,3,4,7,8,9-HpCDF U U U U U NA NA OCDF U U U U U NA NA Total TCDDs U U U U U NA NA Total PeCDDs U U U U U NA NA Total HxCDDs U U U U U NA NA Total HpCDDs U U U U U NA NA Total TCDFs U U U U NA NA Total PeCDFs U U U U NA NA Total HxCDFs U U U U NA NA Total HpCDFs U U U U U NA NA I:\WO\START3\689\42396TBL1-5.XLS 1 of 2 This document shall not be disclosed without the written express permission of U.S. EPA 689-2A-AIEM

63 Table 1-5 Analytical Results Summary Table - Dioxins and Furans Whitestone Point Intake, Saginaw, and Midland Facilities Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan Notes: All results and criteria are presented in µg/l. Bold values display detections. µg/l - Microgram per liter (A) - Criterion is MDNRE Drinking Water Standard pursuant to Section 5 of 1976 PA 399, MCL HpCDD - heptachlorodibenzo-p-dioxin HpCDF - heptachlorodibenofuran HxCDD - hexachlorodibenzo-p-dioxin HxCDF - heptachlorodibenzofuran ID - Identification J - Estimated concentration MCL - Maximum contaminant level MDNRE - Michigan Department of Natural Resources and Environment NA - Not available OCDD - ochtachlorodibenzo-p-dioxin OCDF - octachlorodibenzofuran (O) - Generic cleanup criteria are being held at values that MDNRE has used since August 1998 in recognition of the fact that national efforts to reassess risks posed by dioxin are not yet complete PeCDD - pentachlorodibenzo-p-dioxin PeCDF - pentachlorodibenzofuran TCDD - tetrachlorodibenzo-p-dioxin TCDF - tetrachlorodibenzofuran U - Analyte not detected above reporting limit I:\WO\START3\689\42396TBL1-5.XLS 2 of 2 This document shall not be disclosed without the written express permission of U.S. EPA 689-2A-AIEM

64 Table 2-1 Analytical Results Summary Table - Metals Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIUM DATE COLLECTED 5/27/2010 5/27/2010 MSB-BAY-PRE- UNF Water MSB-BAY-PRE-FIL Water MSB-BAY-POS-UNF Water 5/27/2010 MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) Total Metals (µg/l) Aluminum, Total 50 U 50 U 50 U 50(V) NA Calcium, Total 34,000 35,000 38,000 NA NA Iron, Total J 8.9 J 300(E) NA Magnesium, Total 12,000 12,000 12, ,000 NA Manganese, Total 9.4 J 10 U 10 U 50(E) NA Nickel, Total 10 U 10 U 10 U 100(A) NA Potassium, Total 1,700 1,800 2,000 NA NA Sodium, Total 12,000 12,000 13, ,000 NA Antimony, Total 1.0 U 1.0 U 1.0 U 6.0(A) 6 Arsenic, Total 0.76 J 0.66 J 1.0 U 10(A) 10 Barium, Total ,000(A) 2,000 Beryllium, Total 1.0 U 1.0 U 1.0 U 4.0(A) 4 Cadmium, Total 0.20 U 0.20 U 0.20 U 5.0(A) 5 Chromium, Total 5.0 U 5.0 U 0.49 J 100(A) 1,000 Cobalt, Total 0.13 J J 0.12 J 40 NA Copper, Total ,000(E) 1,300 Lead, Total 0.32 J 1.0 U 0.67 J 4.0 (L) 15 Selenium, Total 2.0 U 2.0 U 2.0 U 50(A) 50 Silver, Total 0.20 U 0.20 U 0.20 U 34 NA Thallium, Total 1.0 U 1.0 U 1.0 U 2.0(A) 2 Vanadium, Total 0.58 J 0.31 J 1.0 U 4.5 NA Zinc, Total 8.8 J 8.8 J 19 J 2,400 NA Mercury, Total 0.20 U 0.20 U 0.10 J 2.0(A) 2 Cyanide, Total 5.00 U 5.00 U 5.00 U 200(A) 200 Total Suspended Solids (mg/l) 5.0 NS NS NA NA I:\WO\START3\689\42396TBL2-1.XLS 1 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

65 Table 2-1 Analytical Results Summary Table - Metals Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan Notes: All results and criteria are presented in µg/l except where noted. Bold values display detections. µg/l - Microgram per liter mg/l - Milligram per liter (A) - Criterion is MDNRE Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL (E) - Criterion is aesthetic drinking water value required by Section 20120a(5) of Natural Resources and the Environmental Protection Act, 1994 PA 451, as amended (NREPA) ID - Identification J - Estimated concentration (L) - Criteria for lead derived using a biologically based model as allowed for under Section 20120a(10) of NREPA MCL - Maximum contaminant level MDNRE - Michigan Department of Natural Resources and Environment NA - Not available NS - Analyte not sampled for U - Analyte not detected above reporting limit (V) - Criterion is the aesthetic drinking water value as required by Section 20120(a)(5) of the NREPA. Concentrations up to 200 ug/l may be acceptable, and still allow for drinking water use, as part of a site-specific cleanup under Section 20120a(2) of the NREPA. I:\WO\START3\689\42396TBL2-1.XLS 2 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

66 SAMPLE ID SAMPLE MEDIUM Table 2-2 Analytical Results Summary Table - Pesticides and PCBs Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-BAY-PRE-UNF- MSB-BAY-PRE-FIL- MSB-BAY-POS-UNF Water Water Water DATE COLLECTED 5/27/2010 5/27/2010 5/27/2010 MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) Organochlorine Pesticides (µg/l) 4,4'-DDD 0.1 U 0.1 U 0.1 U 9.1 NA 4,4'-DDE 0.1 U 0.1 U 0.1 U 4.3 NA 4,4'-DDT 0.1 U 0.1 U 0.1 U 3.6 NA Aldrin 0.05 U 0.05 U 0.05 U NA alpha-bhc 0.05 U 0.05 U 0.05 U NA NA alpha-chlordane 0.05 U 0.05 U 0.05 U NA NA beta-bhc 0.05 U 0.05 U 0.05 U NA NA delta-bhc 0.05 U 0.05 U 0.05 U NA NA Dieldrin 0.1 U 0.1 U 0.1 U 0.11 NA Endosulfan I 0.05 U 0.05 U 0.05 U NA NA Endosulfan II 0.1 U 0.1 U 0.1 U NA NA Endosulfan Sulfate 0.1 U 0.1 U 0.1 U NA NA Endrin 0.1 U 0.1 U 0.1 U 2.0(A) 2 Endrin Aldehyde J 0.1 U 0.1 U NA NA Endrin Ketone 0.1 U 0.1 U 0.1 U NA NA gamma-bhc (Lindane) 0.05 U 0.05 U 0.05 U 0.2 (A) 0.2 gamma-chlordane 0.05 U 0.05 U 0.05 U 2.0 (A) 2 Heptachlor 0.05 U 0.05 U 0.05 U 0.4(A) 0.4 Heptachlor Epoxide 0.05 U 0.05 U 0.05 U 0.2(A) 0.2 Methoxychlor 0.5 UJ 0.5 UJ 0.5 UJ 40(A) 40 Toxaphene 5 U 5 U 5 U 3.0(A) 3 I:\WO\START3\689\42396TBL2-2.XLS 1 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

67 SAMPLE ID SAMPLE MEDIUM Table 2-2 Analytical Results Summary Table - Pesticides and PCBs Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-BAY-PRE-UNF- MSB-BAY-PRE-FIL- MSB-BAY-POS-UNF Water Water Water MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) DATE COLLECTED 5/27/2010 5/27/2010 5/27/2010 PCBs (µg/l) PCB U 0.2 U 0.2 U 0.5 (A) 0.5 PCB U 0.2 U 0.2 U 0.5 (A) 0.5 PCB U 0.2 U 0.2 U 0.5 (A) 0.5 PCB U 0.2 U 0.2 U 0.5 (A) 0.5 PCB U 0.2 U 0.2 U 0.5 (A) 0.5 PCB U 0.2 U 0.2 U 0.5 (A) 0.5 PCB U 0.2 U 0.2 U 0.5 (A) 0.5 Notes: All results and criteria are presented in µg/l. Bold values display detections. µg/l - Microgram per liter (A) - Criterion is MDNRE Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL ID - Identification J - Estimated concentration MCL - Maximum contaminant level MDNRE - Michigan Department of Natural Resources and Environment NA - Not available PCB - Polychlorinated biphenyl U - Analyte not detected above reporting limit I:\WO\START3\689\42396TBL2-2.XLS 2 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

68 Table 2-3 Analytical Results Summary Table - VOCs Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIUM DATE COLLECTED 5/27/2010 MSB-BAY-PRE- UNF Water MSB-BAY-POS- UNF Water 5/27/2010 MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) VOCs (µg/l) 1,1,1-Trichloroethane 1.0 U 1.0 U 200(A) 200 1,1,2,2-Tetrachloroethane 1.0 U 1.0 U 8.5 NA 1,1,2-Trichloro-1,2,2-trifluoroethane 1.0 U 1.0 U 170,000(S) NA 1,1,2-Trichloroethane 1.0 U 1.0 U 5.0(A) 5 1,1-Dichloroethane 1.0 U 1.0 U 880 NA 1,1-Dichloroethene 1.0 U 1.0 U 7.0(A) 7 1,2,4-Trichlorobenzene 1.0 U 1.0 U 70(A) 70 1,2-Dibromo-3-chloropropane 1.0 U 1.0 U NA 0.2 1,2-Dibromoethane 1.0 U 1.0 U 0.05 (A) ,2-Dichlorobenzene 1.0 U 1.0 U 600(A) 600 1,2-Dichloroethane 1.0 U 1.0 U 5.0(A) 5 1,2-Dichloropropane 1.0 U 1.0 U 5.0(A) 5 1,3-Dichlorobenzene 1.0 U 1.0 U 6.6 NA 1,4-Dichlorobenzene 1.0 U 1.0 U 75(A) 75 2-Butanone (MEK) 5.0 U 5.0 U 13,000 NA 2-Hexanone 5.0 U 5.0 U 3,000 NA 4-Methyl-2-pentanone (MIBK) 5.0 U 5.0 U 1,800 NA Acetone 5.0 U 5.0 U 730 NA Benzene 1.0 U 1.0 U 5.0(A) 5 Bromodichloromethane (A,W) 80a Bromoform 1.0 U (A,W) 80a Bromomethane 1.0 U 1.0 U 10 NA Carbon Disulfide 5.0 U 5.0 U 800 NA Carbon Tetrachloride 1.0 U 1.0 U 5.0(A) 5 Chlorobenzene 1.0 U 1.0 U 100(A) 100 Chloroethane 1.0 U 1.0 U 430 NA Chloroform (A,W) 80a Chloromethane 1.0 U 1.0 U 260 NA cis-1,2-dichloroethene 1.0 U 1.0 U 70(A) 70 cis-1,3-dichloropropene 1.0 U 1.0 U NA NA Cyclohexane 5.0 U 5.0 U NA NA Dibromochloromethane (A,W) 80a Dichlorodifluoromethane 1.0 U 1.0 U 1,700 NA Ethylbenzene 1.0 U 1.0 U 74(E) 700 Isopropylbenzene 1.0 U 1.0 U 800 NA Methyl Acetate 5.0 U 5.0 U NA NA Methyl tert-butyl Ether 1.0 U 1.0 U 40(E) NA I:\WO\START3\689\42396TBL2-3.XLS 1 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

69 Table 2-3 Analytical Results Summary Table - VOCs Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIUM MSB-BAY-PRE- UNF Water MSB-BAY-POS- UNF Water MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) DATE COLLECTED 5/27/2010 5/27/2010 VOCs (µg/l) Methylcyclohexane 5.0 U 5.0 U NA NA Methylene Chloride 1.0 U 1.0 U 5.0(A) NA Styrene 1.0 U 1.0 U 100(A) 100 Tetrachloroethene 1.0 U 1.0 U 5.0(A) 5 Toluene 1.0 U 1.0 U 790(E) 1,000 trans-1,2-dichloroethene 1.0 U 1.0 U 100(A) 100 trans-1,3-dichloropropene 1.0 U 1.0 U NA NA Trichloroethene 1.0 U 1.0 U 5.0(A) 5 Trichlorofluoromethane 1.0 U 1.0 U 2,600 NA Vinyl Chloride 1.0 U 1.0 U 2.0(A) 2 Xylene (Total) 3.0 U 3.0 U 280(E) 10,000 Notes: All results and criteria are presented in µg/l. Bold values display detections. µg/l - Microgram per liter (A) - Criterion is MDNRE Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL (E) - Criterion is aesthetic drinking water value required by Section 20120a(5) of Natural Resources and the Environmental Protection Act, 1994 PA 451, as amended (NREPA) ID - Identification J - Estimated concentration MCL - Maximum contaminant level MDNRE - Michigan Department of Natural Resources and Environment NA - Not available (S) - Criterion defaults to hazardous substance-specific water solubility limit U - Analyte not detected above reporting limit VOC - Volatile organic compound (W) - Concentration of trihalomethanes in groundwater shall be added together to determine compliance with the MDNRE drinking water standard of 80 µg/l a The MCL is the total concentration of trihalomethanes I:\WO\START3\689\42396TBL2-3.XLS 2 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

70 SAMPLE ID SAMPLE MEDIUM Table 2-4 Analytical Results Summary Table - SVOCs Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-BAY-PRE-UNF- MSB-BAY-PRE-FIL Water Water MSB-BAY-POS- UNF Water DATE COLLECTED 5/27/2010 5/27/2010 5/27/2010 SVOCs (µg/l) MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) 1,1'-Biphenyl 0.50 U 0.50 U 0.50 U NA NA 2,4,5-Trichlorophenol 0.50 UJ 0.50 UJ 0.50 UJ 730 NA 2,4,6-Trichlorophenol 0.50 UJ 0.50 UJ 0.50 UJ 120 NA 2,4-Dichlorophenol 0.50 UJ 0.50 U 0.50 UJ 73 NA 2,4-Dimethylphenol 1.0 U 1.0 U 1.0 UJ 370 NA 2,4-Dinitrophenol 5.0 UJ 5.0 U 5.0 UJ NA NA 2,4-Dinitrotoluene 0.50 U 0.50 U 0.50 U 7.7 NA 2,6-Dinitrotoluene 0.50 U 0.50 U 0.50 U NA NA 2-Chloronaphthalene 0.50 U 0.50 U 0.50 U NA NA 2-Chlorophenol 0.50 UJ 0.50 U 0.50 UJ 45 NA 2-Methylnaphthalene 0.50 U 0.50 U 0.50 U 260 NA 2-Methylphenol 0.50 UJ 0.50 U 0.50 UJ NA NA 2-Nitroaniline 1.0 U 1.0 U 1.0 U NA NA 2-Nitrophenol 0.50 UJ 0.50 U 0.50 UJ 20 NA 3,3 -Dichlorobenzidine 1.0 U 1.0 U 1.0 U 1.1 NA 3-Nitroaniline 1.0 U 1.0 U 1.0 U NA NA 4,6-Dinitro-2-methylphenol 0.50 UJ 0.50 U 0.50 UJ NA NA 4-Bromophenyl Phenyl Ether 0.50 U 0.50 U 0.50 U NA NA 4-Chloro-3-methylphenol 0.50 U 0.50 U 0.50 U 150 NA 4-Chloroaniline 1.0 U 1.0 U 1.0 U NA NA 4-Chlorophenyl Phenyl Ether 0.50 U 0.50 U 0.50 U NA NA 4-Methylphenol 0.50 UJ 0.50 U 0.50 UJ NA NA 4-Nitroaniline 1.0 U 1.0 U 1.0 U NA NA 4-Nitrophenol 5.0 UJ 5.0 U 5.0 UJ NA NA Acenaphthene 0.50 U 0.50 U 0.50 U 1,300 NA Acenaphthylene 0.50 U 0.50 U 0.50 U 52 NA Acetophenone 0.50 U 0.50 U 0.50 U 1,500 NA Anthracene 0.50 U 0.50 U 0.50 U 43(S) NA Atrazine 0.50 U 0.50 U 0.50 U 3.0(A) 3 Benzaldehyde 0.50 U 0.18 J 0.50 U NA NA Benzo(a)anthracene 0.50 U 0.50 U 0.50 U 2.1 NA Benzo(a)pyrene 0.20 U 0.20 U 0.20 U 5.0(A) 0.2 Benzo(b)fluoranthene 0.50 U 0.50 U 0.50 U 1.5(S,AA) NA Benzo(g,h,i)perylene 0.50 U 0.50 U 0.50 U 1.0(M); 0.26(S) NA Benzo(k)fluoranthene 0.50 U 0.50 U 0.50 U 1.0(M); 0.8(S) NA Bis(2-chloroethoxy)methane 0.50 U 0.50 U 0.50 U NA NA Bis(2-chloroethyl) Ether 0.50 U 0.50 U 0.50 U 2 NA Bis(2-chloroisopropyl) Ether 0.50 U 0.50 U 0.50 U NA NA Bis(2-ethylhexyl) Phthalate 0.50 U 0.50 U 0.50 U 6.0(A) 6 I:\WO\START3\689\42396TBL2-4.XLS 1 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

71 Table 2-4 Analytical Results Summary Table - SVOCs Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-BAY-PRE-UNF- MSB-BAY-PRE-FIL- MSB-BAY-POS- SAMPLE ID SAMPLE MEDIUM Water Water UNF Water DATE COLLECTED 5/27/2010 5/27/2010 5/27/2010 SVOCs (µg/l) MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) Butyl Benzyl Phthalate 1.0 U 1.0 U 1.0 U 1,200 NA Caprolactam 1.0 UJ 1.0 UJ 1.0 UJ 5,800 NA Carbazole 0.50 U 0.50 U 0.50 U 85 NA Chrysene 0.50 U 0.50 U 0.50 U 1.6(S) NA Di-n-butyl Phthalate 1.0 U 1.0 U 1.0 U 880 NA Di-n-octyl Phthalate 0.50 U 0.50 U 0.50 U 130 NA Dibenz(a,h)anthracene 0.50 U 0.50 U 0.50 U 2.0(M); 0.21 NA Dibenzofuran 0.50 U 0.50 U 0.50 U ID NA Diethyl Phthalate 0.50 U 0.30 J 0.50 U 5,500 NA Dimethyl Phthalate 0.50 U 0.50 U 0.50 U 73,000 NA Fluoranthene 0.50 U 0.50 U 0.50 U 210(S) NA Fluorene 0.50 U 0.50 U 0.50 U 880 NA Hexachlorobenzene 0.50 U 0.50 U 0.50 U 1.0(A) 1 Hexachlorobutadiene 0.50 U 0.50 U 0.50 U 15 NA Hexachlorocyclopentadiene 0.50 U 0.50 U 0.50 U 50(A) 50 Hexachloroethane 0.50 U 0.50 U 0.50 U 7.3 NA Indeno(1,2,3-cd)pyrene 0.50 U 0.50 U 0.50 U 2.0(M); 0022(S) NA Isophorone 0.50 U 0.50 U 0.50 U 770 NA N-Nitroso-di-n-propylamine 0.50 U 0.50 U 0.50 U 5.0(M); 0.19 NA N-Nitroso-diphenylamine 0.50 U 0.50 U 0.50 U 270 NA Naphthalene 0.50 U 0.50 U 0.50 U 520 NA Nitrobenzene 0.50 U 0.50 U 0.50 U 3.4 NA Pentachlorophenol 0.50 UJ 0.50 UJ 0.50 UJ 1.0(A) 1 Phenanthrene 0.50 U 0.50 U 0.50 U 52 NA Phenol 0.50 UJ 0.50 UJ 0.50 UJ 4,400 NA Pyrene 0.50 U 0.50 U 0.50 U 140(S) NA Notes: All results and criteria are presented in µg/l. Bold values display detections. µg/l - Microgram per liter (A) - Criterion is MDNRE Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL (AA) - Comparison to criteria may take into account evaluation of if hazardous substances are adsorbed to particulates rather than dissolved in water and if filtered groundwater samples were used to evaluate groundwater ID - Identification or insufficient data J - Estimated concentration (M) - Calculated criterion is below analytical target detection limit,; therefore, the criterion defaults to target detection limit MCL - Maximum contaminant level MDNRE - Michigan Department of Natural Resources and Environment NA - Not available (S) - Criterion defaults to hazardous substance-specific water solubility limit SVOC - Semivolatile organic compound U - Analyte not detected above reporting limit I:\WO\START3\689\42396TBL2-4.XLS 2 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

72 Table 2-5 Analytical Results Summary Table - Dioxins and Furans Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIUM DATE COLLECTED 5/27/2010 MSB-BAY-PRE-UNF- MSB-BAY-PRE-FIL- MSB-BAY-POS-UNF Water Water Water 5/27/2010 5/27/2010 MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) Dioxin/Furan (µg/l) 2,3,7,8-TCDD U U U (A,O) ,2,3,7,8-PeCDD U U U NA NA 1,2,3,4,7,8-HxCDD U U U NA NA 1,2,3,6,7,8-HxCDD U U U NA NA 1,2,3,7,8,9-HxCDD U U U NA NA 1,2,3,4,6,7,8-HpCDD U U U NA NA OCDD U U U NA NA 2,3,7,8-TCDF U U U NA NA 1,2,3,7,8-PeCDF U U U NA NA 2,3,4,7,8-PeCDF U U U NA NA 1,2,3,4,7,8-HxCDF U U U NA NA 1,2,3,6,7,8-HxCDF U U U NA NA 2,3,4,6,7,8-HxCDF U U U NA NA 1,2,3,7,8,9-HxCDF U U U NA NA 1,2,3,4,6,7,8-HpCDF U U U NA NA 1,2,3,4,7,8,9-HpCDF U U U NA NA OCDF U U U NA NA Total TCDDs U U U NA NA Total PeCDDs U U U NA NA Total HxCDDs U U U NA NA Total HpCDDs U U U NA NA Total TCDFs U NA NA Total PeCDFs U U NA NA Total HxCDFs U U NA NA Total HpCDFs U U U NA NA I:\WO\START3\689\42396TBL2-5.XLS 1 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

73 Table 2-5 Analytical Results Summary Table - Dioxins and Furans Bay City Facility Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan Notes: All results and criteria are presented in µg/l. Bold values display detections. µg/l - Microgram per liter (A) - Criterion is MDNRE Drinking Water Standard pursuant to Section 5 of 1976 PA 399, MCL HpCDD - heptachlorodibenzo-p-dioxin HpCDF - heptachlorodibenofuran HxCDD - hexachlorodibenzo-p-dioxin HxCDF - heptachlorodibenzofuran ID - Identification J - Estimated concentration MCL - Maximum contaminant level MDNRE - Michigan Department of Natural Resources and Environment NA - Not available OCDD - ochtachlorodibenzo-p-dioxin OCDF - octachlorodibenzofuran (O) - Generic cleanup criteria are being held at values that MDNRE has used since August 1998 in recognition of the fact that national efforts to reassess risks posed by dioxin are not yet complete PeCDD - pentachlorodibenzo-p-dioxin PeCDF - pentachlorodibenzofuran TCDD - tetrachlorodibenzo-p-dioxin TCDF - tetrachlorodibenzofuran U - Analyte not detected above reporting limit I:\WO\START3\689\42396TBL2-5.XLS 2 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

74 Table 3-1 Analytical Results Summary Table - Metals Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED MSB-EQUIPMENT-FIL Water 5/27/2010 MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) PARAMETERS Total Metals ug/l Aluminum, Total 50 U 50(V) NA Calcium, Total 500 U NA NA Iron, Total 11 J 300(E) NA Magnesium, Total 500 U 400,000 NA Manganese, Total 10 U 50(E) NA Nickel, Total 10 U 100(A) NA Potassium, Total 100 U NA NA Sodium, Total 500 U 120,000 NA Antimony, Total 1.0 U 6.0(A) 6 Arsenic, Total 1.0 U 10(A) 10 Barium, Total 1.0 U 2,000(A) 2,000 Beryllium, Total 1.0 U 4.0(A) 4 Cadmium, Total 0.20 U 5.0(A) 5 Chromium, Total 0.56 J 100(A) 1,000 Cobalt, Total 1.0 U 40 NA Copper, Total 1.0 U 1,000(E) 1,300 Lead, Total 1.0 U 4.0 (L) 15 Selenium, Total 2.0 U 50(A) 50 Silver, Total 0.20 U 34 NA Thallium, Total 1.0 U 2.0(A) 2 Vanadium, Total 1.0 U 4.5 NA Zinc, Total 4.6 J 2,400 NA Mercury, Total 0.20 U 2.0(A) 2 Cyanide, Total 5.00 U 200(A) 200 Total Suspended Solids NS NA NA I:\WO\START3\689\42396TBL3-1.XLS 1 of 2 This document shall not be disclosed without express written permission of U.S. EPA 689-2A-AIEM

75 Table 3-1 Analytical Results Summary Table - Metals Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan Notes: All results and criteria are presented in µg/l. Bold values display detections. µg/l - Microgram per liter (A) - Criterion is MDNRE Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL (E) - Criterion is aesthetic drinking water value required by Section 20120a(5) of Natural Resources and the Environmental Protection Act, 1994 PA 451, as amended (NREPA) ID - Identification J - Estimated concentration (L) - Criteria for lead derived using a biologically based model as allowed for under Section 20120a(10) of NREPA MCL - Maximum contaminant level MDNRE - Michigan Department of Natural Resources and Environment NA - Not available NS - Analyte not sampled for U - Analyte not detected above reporting limit (V) - Criterion is the aesthetic drinking water value as required by Section 20120(a)(5) of the NREPA. Concentrations up to 200 ug/l may be acceptable, and still allow for drinking water use, as part of a site-specific cleanup under Section 20120a(2) of the NREPA. I:\WO\START3\689\42396TBL3-1.XLS 2 of 2 This document shall not be disclosed without express written permission of U.S. EPA 689-2A-AIEM

76 Table 3-2 Analytical Results Summary Table - Pesticides and PCBs Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED MSB-EQUIPMENT-FIL MDNRE Part 201 Residential and Commercial 1 Water Drinking Water Criteria 5/27/2010 National Primary Drinking Water Regulations (MCLs) PARAMETERS Organochlorine Pesticides ug/l 4,4'-DDD 0.1 U 9.1 NA 4,4'-DDE 0.1 U 4.3 NA 4,4'-DDT 0.1 U 3.6 NA Aldrin 0.05 U NA alpha-bhc 0.05 U NA NA alpha-chlordane 0.05 U NA NA beta-bhc 0.05 U NA NA delta-bhc 0.05 U NA NA Dieldrin 0.1 U 0.11 NA Endosulfan I 0.05 U NA NA Endosulfan II 0.1 U NA NA Endosulfan Sulfate 0.1 U NA NA Endrin 0.1 U 2.0(A) 2 Endrin Aldehyde 0.1 U NA NA Endrin Ketone 0.1 U NA NA gamma-bhc (Lindane) 0.05 U 0.2 (A) 0.2 gamma-chlordane 0.05 U 2.0 (A) 2 Heptachlor 0.05 U 0.4(A) 0.4 Heptachlor Epoxide 0.05 U 0.2(A) 0.2 Methoxychlor 0.5 UJ 40(A) 40 Toxaphene 5 U 3.0(A) 3 I:\WO\START3\689\42396TBL3-2.XLS 1 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

77 Table 3-2 Analytical Results Summary Table - Pesticides and PCBs Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED MSB-EQUIPMENT-FIL MDNRE Part 201 Residential and Commercial 1 Water Drinking Water Criteria 5/27/2010 National Primary Drinking Water Regulations (MCLs) PARAMETERS Polychlorinated Biphenyls (PCBs) ug/l PCB U 0.5 (A) 0.5 PCB U 0.5 (A) 0.5 PCB U 0.5 (A) 0.5 PCB U 0.5 (A) 0.5 PCB U 0.5 (A) 0.5 PCB U 0.5 (A) 0.5 PCB U 0.5 (A) 0.5 Notes: All results and criteria are presented in µg/l. Bold values display detections. µg/l - Microgram per liter (A) - Criterion is MDNRE Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL ID - Identification J - Estimated concentration MCL - Maximum contaminant level MDNRE - Michigan Department of Natural Resources and Environment NA - Not available PCB - Polychlorinated biphenyl U - Analyte not detected above reporting limit I:\WO\START3\689\42396TBL3-2.XLS 2 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

78 Table 3-3 Analytical Results Summary Table - VOCs Equipment and Trip Blanks Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED Trip Blank TM1314 Water NA Trip Blank TM2467 Water NA Trip Blank TM1195 Water NA Trip Blank TM2059 Water NA Trip Blank TM2053 Water NA Trip Blank TM0901 Water NA MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) PARAMETERS Volatile Organic Compounds (VOCs) ug/l 1,1,1-Trichloroethane 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 200(A) 200 1,1,2,2-Tetrachloroethane 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 8.5 NA 1,1,2-Trichloro-1,2,2-trifluoroethane 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 170,000(S) NA 1,1,2-Trichloroethane 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 5.0(A) 5 1,1-Dichloroethane 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 880 NA 1,1-Dichloroethene 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 7.0(A) 7 1,2,4-Trichlorobenzene 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 70(A) 70 1,2-Dibromo-3-chloropropane 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U NA 0.2 1,2-Dibromoethane 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 0.05 (A) ,2-Dichlorobenzene 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 600(A) 600 1,2-Dichloroethane 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 5.0(A) 5 1,2-Dichloropropane 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 5.0(A) 5 1,3-Dichlorobenzene 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 6.6 NA 1,4-Dichlorobenzene 0.13 J 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 75(A) 75 2-Butanone (MEK) 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 13,000 NA 2-Hexanone 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 3,000 NA 4-Methyl-2-pentanone (MIBK) 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 1,800 NA Acetone 2.7 J 5.0 U 2.8 J 2.9 J 2.4 J 5.0 U 730 NA Benzene 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 5.0(A) 5 Bromodichloromethane 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 80(A,W) 80a Bromoform 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 80(A,W) 80a I:\WO\START3\689\42396TBL3-3.XLS 1 of 3 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

79 Table 3-3 Analytical Results Summary Table - VOCs Equipment and Trip Blanks Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED Trip Blank TM1314 Water NA Trip Blank TM2467 Water NA Trip Blank TM1195 Water NA Trip Blank TM2059 Water NA Trip Blank TM2053 Water NA Trip Blank TM0901 Water NA MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) PARAMETERS Volatile Organic Compounds (VOCs) ug/l Bromomethane 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 10 NA Carbon Disulfide 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 800 NA Carbon Tetrachloride 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 5.0(A) 5 Chlorobenzene 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 100(A) 100 Chloroethane 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 430 NA Chloroform 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 80(A,W) 80a Chloromethane 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 260 NA cis-1,2-dichloroethene 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 70(A) 70 cis-1,3-dichloropropene 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U NA NA Cyclohexane 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U NA NA Dibromochloromethane 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 80(A,W) 80a Dichlorodifluoromethane 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1,700 NA Ethylbenzene 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 74(E) 700 Isopropylbenzene 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 800 NA Methyl Acetate 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U NA NA Methyl tert-butyl Ether 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 40(E) NA Methylcyclohexane 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U NA NA Methylene Chloride 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 5.0(A) NA Styrene 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 100(A) 100 Tetrachloroethene 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 5.0(A) 5 I:\WO\START3\689\42396TBL3-3.XLS 2 of 3 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

80 Table 3-3 Analytical Results Summary Table - VOCs Equipment and Trip Blanks Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED Trip Blank TM1314 Water NA Trip Blank TM2467 Water NA Trip Blank TM1195 Water NA Trip Blank TM2059 Water NA Trip Blank TM2053 Water NA Trip Blank TM0901 Water NA MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) PARAMETERS Volatile Organic Compounds (VOCs) ug/l Toluene 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 790(E) 1,000 trans-1,2-dichloroethene 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 100(A) 100 trans-1,3-dichloropropene 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U NA NA Trichloroethene 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 5.0(A) 5 Trichlorofluoromethane 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 2,600 NA Vinyl Chloride 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 2.0(A) 2 Xylene (Total) 3.0 U 3.0 U 3.0 U 3.0 U 3.0 U 3.0 U 280(E) 10,000 Notes: All results and criteria are presented in µg/l. Bold values display detections. µg/l - Microgram per liter (A) - Criterion is MDNRE Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL (E) - Criterion is aesthetic drinking water value required by Section 20120a(5) of Natural Resources and the Environmental Protection Act, 1994 PA 451, as amended (NREPA) ID - Identification J - Estimated concentration MCL - Maximum contaminant level MDNRE - Michigan Department of Natural Resources and Environment NA - Not available (S) - Criterion defaults to hazardous substance-specific water solubility limit U - Analyte not detected above reporting limit VOC - Volatile organic compound (W) - Concentration of trihalomethanes in groundwater shall be added together to determine compliance with the MDNRE drinking water standard of 80 µg/l a The MCL is the total concentration of trihalomethanes I:\WO\START3\689\42396TBL3-3.XLS 3 of 3 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

81 Table 3-4 Analytical Results Summary Table - SVOCs Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED MSB-EQUIPMENT-FIL Water 5/27/2010 MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) PARAMETERS Semi Volatile Organic Compounds (SVOCs) ug/l 1,1'-Biphenyl 0.50 U NA NA 2,4,5-Trichlorophenol 0.50 UJ 730 NA 2,4,6-Trichlorophenol 0.50 UJ 120 NA 2,4-Dichlorophenol 0.50 U 73 NA 2,4-Dimethylphenol 1.0 U 370 NA 2,4-Dinitrophenol 5.0 U NA NA 2,4-Dinitrotoluene 0.50 U 7.7 NA 2,6-Dinitrotoluene 0.50 U NA NA 2-Chloronaphthalene 0.50 U NA NA 2-Chlorophenol 0.50 U 45 NA 2-Methylnaphthalene 0.50 U 260 NA 2-Methylphenol 0.50 U NA NA 2-Nitroaniline 1.0 U NA NA 2-Nitrophenol 0.50 U 20 NA 3,3 -Dichlorobenzidine 1.0 U 1.1 NA 3-Nitroaniline 1.0 U NA NA 4,6-Dinitro-2-methylphenol 0.50 U NA NA 4-Bromophenyl Phenyl Ether 0.50 U NA NA 4-Chloro-3-methylphenol 0.50 U 150 NA 4-Chloroaniline 1.0 U NA NA I:\WO\START3\689\42396TBL3-4.XLS 1 of 4 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

82 Table 3-4 Analytical Results Summary Table - SVOCs Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED MSB-EQUIPMENT-FIL Water 5/27/2010 MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) PARAMETERS Semi Volatile Organic Compounds (SVOCs) ug/l 4-Chlorophenyl Phenyl Ether 0.50 U NA NA 4-Methylphenol 0.50 U NA NA 4-Nitroaniline 1.0 U NA NA 4-Nitrophenol 5.0 U NA NA Acenaphthene 0.50 U 1,300 NA Acenaphthylene 0.50 U 52 NA Acetophenone 0.50 U 1,500 NA Anthracene 0.50 U 43(S) NA Atrazine 0.50 U 3.0(A) 3 Benzaldehyde 0.50 U NA NA Benzo(a)anthracene 0.50 U 2.1 NA Benzo(a)pyrene 0.20 U 5.0(A) 0.2 Benzo(b)fluoranthene 0.50 U 1.5(S,AA) NA Benzo(g,h,i)perylene 0.50 U 1.0(M); 0.26(S) NA Benzo(k)fluoranthene 0.50 U 1.0(M); 0.8(S) NA Bis(2-chloroethoxy)methane 0.50 U NA NA Bis(2-chloroethyl) Ether 0.50 U 2 NA Bis(2-chloroisopropyl) Ether 0.50 U NA NA Bis(2-ethylhexyl) Phthalate 0.50 U 6.0(A) 6 I:\WO\START3\689\42396TBL3-4.XLS 2 of 4 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

83 Table 3-4 Analytical Results Summary Table - SVOCs Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED MSB-EQUIPMENT-FIL Water 5/27/2010 MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) PARAMETERS Semi Volatile Organic Compounds (SVOCs) ug/l Butyl Benzyl Phthalate 1.0 U 1,200 NA Caprolactam 1.0 UJ 5,800 NA Carbazole 0.50 U 85 NA Chrysene 0.50 U 1.6(S) NA Di-n-butyl Phthalate 1.0 U 880 NA Di-n-octyl Phthalate 0.50 U 130 NA Dibenz(a,h)anthracene 0.50 U 2.0(M); 0.21 NA Dibenzofuran 0.50 U ID NA Diethyl Phthalate 0.50 U 5,500 NA Dimethyl Phthalate 0.50 U 73,000 NA Fluoranthene 0.50 U 210(S) NA Fluorene 0.50 U 880 NA Hexachlorobenzene 0.50 U 1.0(A) 1 Hexachlorobutadiene 0.50 U 15 NA Hexachlorocyclopentadiene 0.50 U 50(A) 50 Hexachloroethane 0.50 U 7.3 NA Indeno(1,2,3-cd)pyrene 0.50 U 2.0(M); 0022(S) NA Isophorone 0.50 U 770 NA N-Nitroso-di-n-propylamine 0.50 U 5.0(M); 0.19 NA N-Nitroso-diphenylamine 0.50 U 270 NA I:\WO\START3\689\42396TBL3-4.XLS 3 of 4 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

84 Table 3-4 Analytical Results Summary Table - SVOCs Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan SAMPLE ID SAMPLE MEDIA DATE COLLECTED MSB-EQUIPMENT-FIL Water 5/27/2010 MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) PARAMETERS Semi Volatile Organic Compounds (SVOCs) ug/l Naphthalene 0.50 U 520 NA Nitrobenzene 0.50 U 3.4 NA Pentachlorophenol 0.50 UJ 1.0(A) 1 Phenanthrene 0.50 U 52 NA Phenol 0.50 UJ 4,400 NA Pyrene 0.50 U 140(S) NA Notes: All results and criteria are presented in µg/l. Bold values display detections. µg/l - Microgram per liter (A) - Criterion is MDNRE Drinking Water Standard persuant to Section 5 of 1976 PA 399, MCL (AA) - Comparison to criteria may take into account evaluation of if hazardous substances are adsorbed to particulates rather than dissolved in water and if filtered groundwater samples were used to evaluate groundwater ID - Identification or insufficient data J - Estimated concentration (M) - Calculated criterion is below analytical target detection limit,; therefore, the criterion defaults to target detection limit MCL - Maximum contaminant level MDNRE - Michigan Department of Natural Resources and Environment NA - Not available (S) - Criterion defaults to hazardous substance-specific water solubility limit SVOC - Semivolatile organic compound U - Analyte not detected above reporting limit I:\WO\START3\689\42396TBL3-4.XLS 4 of 4 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

85 SAMPLE ID SAMPLE MEDIUM Table 3-5 Analytical Results Summary Table - Dioxins and Furans Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan MSB-EQUIPMENT-FIL Water DATE COLLECTED 5/27/2010 MDNRE Part 201 Residential and Commercial 1 Drinking Water Criteria National Primary Drinking Water Regulations (MCLs) Dioxin/Furan (µg/l) 2,3,7,8-TCDD U (A,O) ,2,3,7,8-PeCDD U NA NA 1,2,3,4,7,8-HxCDD U NA NA 1,2,3,6,7,8-HxCDD U NA NA 1,2,3,7,8,9-HxCDD U NA NA 1,2,3,4,6,7,8-HpCDD U NA NA OCDD U NA NA 2,3,7,8-TCDF U NA NA 1,2,3,7,8-PeCDF U NA NA 2,3,4,7,8-PeCDF U NA NA 1,2,3,4,7,8-HxCDF U NA NA 1,2,3,6,7,8-HxCDF U NA NA 2,3,4,6,7,8-HxCDF U NA NA 1,2,3,7,8,9-HxCDF U NA NA 1,2,3,4,6,7,8-HpCDF U NA NA 1,2,3,4,7,8,9-HpCDF U NA NA OCDF U NA NA Total TCDDs U NA NA Total PeCDDs U NA NA Total HxCDDs U NA NA Total HpCDDs U NA NA Total TCDFs U NA NA Total PeCDFs U NA NA Total HxCDFs U NA NA Total HpCDFs U NA NA I:\WO\START3\689\42396TBL3-5.XLS 1 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

86 Table 3-5 Analytical Results Summary Table - Dioxins and Furans Equipment Blank Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan Notes: All results and criteria are presented in µg/l. Bold values display detections. µg/l - Microgram per liter (A) - Criterion is MDNRE Drinking Water Standard pursuant to Section 5 of 1976 PA 399, MCL HpCDD - heptachlorodibenzo-p-dioxin HpCDF - heptachlorodibenofuran HxCDD - hexachlorodibenzo-p-dioxin HxCDF - heptachlorodibenzofuran ID - Identification J - Estimated concentration MCL - Maximum contaminant level MDNRE - Michigan Department of Natural Resources and Environment NA - Not available OCDD - ochtachlorodibenzo-p-dioxin OCDF - octachlorodibenzofuran (O) - Generic cleanup criteria are being held at values that MDNRE has used since August 1998 in recognition of the fact that national efforts to reassess risks posed by dioxin are not yet complete PeCDD - pentachlorodibenzo-p-dioxin PeCDF - pentachlorodibenzofuran TCDD - tetrachlorodibenzo-p-dioxin TCDF - tetrachlorodibenzofuran U - Analyte not detected above reporting limit I:\WO\START3\689\42396TBL3-5.XLS 2 of 2 This document shall not be disclosed without the express written permission of U.S. EPA 689-2A-AIEM

87 Table 4 Water Quality Report Data Comparison Midland/Saginaw/Bay City Water Supply Sampling Arenac, Midland, Saginaw, and Bay Counties, Michigan LOCATION SAMPLING EVENT REPORT DATE MIDLAND SAGINAW POST POST MIDLAND a TREATMENT SAGINAW b TREATMENT BAY CITY c Annual Water Supply Annual Water Supply Annual BAY CITY POST TREATMENT Water Supply 2010 National Primary Drinking Water Regulations (MCLs) PARAMETERS Sodium, Total - 4,300 6,000 4,900 12,000 13,000 NA Barium, Total ,000 Copper, Total ,300 Lead, Total 11 ND 6 ND J 15 Selenium, Total 2 ND 2 ND - ND 50 Bromodichloromethane e Bromoform - ND - ND e Chloroform e Dibromochloromethane e Total Trihalomethanes e Notes: All results and criteria are presented in µg/l. Bold values display detections. Italicized values exceed National Primary Drinking Water Regulations (MCLs) - - Not reported in drinking water report µg/l - Microgram per liter J - Estimated concentration MCL - Maximum contaminant level NA - Not available ND - Not detected U - Analyte not detected above reporting limit a Midland 2008 Drinking Water Report values are the average values for barium and selenium, the 90th percentile values for copper and lead, and the running annual average (RAA) for total trihalomethanes. b Saginaw 2008 Drinking Water Report values are either the average reported value or, in the case of copper and lead, the maximum reported value. c Bay City 2010 Drinking Water Report values are the average values for sodium, bromodichloromethane, chloroform and dibromochloromethane, the 90th percentile values for copper and lead, and the Highest Running Annual Average (RAA) values for total trihalomethanes. e The MCL is the total concentration of trihalomethanes I:\WO\START3\689\42396TBL4.XLS 1 of 1 This document shall not be disclosed without the express written permission of U.S. EPA A-AIEM

88 ATTACHMENT D ANALYTICAL DATA AND DATA VALIDATION REPORTS

89 MIDLAND/SAGINAW DIOXIN SITE MUNICIPAL WATER SAMPLING SAGINAW, MICHIGAN DATA VALIDATION REPORT Date: July 11, 2010 Laboratory: TriMatrix Laboratories, Inc. (TriMatrix), Grand Rapids, Michigan Laboratory Project #: Data Validation Performed By: Lisa Graczyk, Weston Solutions, Inc. (WESTON ) Superfund Technical Assessment and Response Team (START) Weston Analytical Work Order #/TDD #: /S This data validation report has been prepared by WESTON START under the START III Region V contract. This report documents the data validation for eight water samples, six trip blanks, and one equipment blank collected for the Midland/Saginaw Dioxin Site Municipal Water Sampling Site (MSB) that were analyzed for the following parameters and U.S. Environmental Protection Agency (U.S. EPA) methods: Target Compound List (TCL) Volatile Organic Compounds (VOC) by SW-846 Method 8260B TCL Semivolatile Organic Compounds (SVOC) by SW-846 Method 8270C TCL Polychlorinated Biphenyls (PCB) by SW-846 Method 8082 TCL Pesticides by SW-846 Method 8081A Target Analyte List (TAL) Metals by SW-846 Methods 6020A, 6010B, and 7470A Cyanide by SW-846 Method 9012A Total Suspended Solids (TSS) by Standard Method (SM) 2540 D A level IV data package was requested from TriMatrix. The data validation was conducted in general accordance with the U.S. EPA Contract Laboratory Program National Functional Guidance for Superfund Organic Methods Data Review dated June 2008 and Contract Laboratory Program National Functional Guidelines for Inorganic Data Review dated October The Attachment contains the results summary sheets with the hand-written qualifiers applied during data validation.

90 Data Validation Report Midland/Saginaw Dioxin Site Municipal Water Sampling Site TriMatrix Laboratories, Inc. Laboratory Project #: VOCs BY SW-846 METHOD 8260B 1. Samples The following table summarizes the samples for which this data validation is being conducted. Samples Lab ID Matrix Date Collected Date Analyzed MSB-SAG-POS-UNF Water 5/26/2010 6/5/2010 Trip Blank TM Water 5/27/2010 6/4/2010 MSB-MID-POS-UNF Water 5/26/2010 6/5/2010 Trip Blank TM Water 5/27/2010 6/5/2010 MSB-WSP-PRE-UNF Water 5/27/2010 6/5/2010 Trip Blank TM Water 5/27/2010 6/5/2010 MSB-WSP-PRE-UNF D Water 5/27/2010 6/5/2010 Trip Blank TM Water 5/27/2010 6/5/2010 MSB-BAY-PRE-UNF Water 5/27/2010 6/5/2010 Trip Blank TM Water 5/27/2010 6/5/2010 MSB-BAY-POS-UNF Water 5/27/2010 6/5/2010 Trip Blank TM Water 5/27/2010 6/5/ Holding Times The samples were analyzed within the required holding time limit of 14 days from sample collection. 3. Gas Chromatograph/Mass Spectrometer (GC/MS) Instrument Performance Check The instrument performance check using bromofluorobenzene (BFB) was performed and met the ion abundance criteria specified in method 8260B. 4. Initial Calibration For the initial calibration, the percent relative standard deviations (%RSD) for target compounds were less than 30 except for acetone. For acetone, the laboratory performed a linear regression analysis and the correlation coefficient was greater than 0.99 which is acceptable; therefore, no qualifications are required. The relative response factor (RRF) was greater than 0.05 for target analytes.

91 Data Validation Report Midland/Saginaw Dioxin Site Municipal Water Sampling Site TriMatrix Laboratories, Inc. Laboratory Project #: Continuing Calibration Verification (CCV) The percent differences for the CCV standards for all target compounds were within the control limit of less than or equal to 25 percent. 6. Blanks A method blank was analyzed with the VOC analysis and was free of target compound contamination above the reporting limit. 1,4-Dichlorobenzene was detected in the method blank below the reporting limit at 0.16 microgram per liter (µg/l). Because this compound was not detected in the samples, no qualification is required. Six trip blanks were analyzed with the VOC analysis and were free of target compound contamination above the reporting limit. The following detections were below the reporting limit. 1,4-Dichlorobenzene was detected below the reporting limit in one of the trip blanks at 0.13 µg/l. Because 1,4-dichlorobenzene was not detected in the samples, no qualification is required. Acetone was detected below the reporting limit in four of the trip blanks at concentrations ranging from 2.4 to 2.9 µg/l. Because the detections of acetone in the samples were also below the reporting limit and at similar concentrations, the acetone results for samples in a cooler with the contaminated trip blank were flagged U as not detected. The acetone contamination in the trip blanks may have been introduced during travel/field activities, or from the bottles. 7. Surrogate Results The surrogate recovery results were within the laboratory-established quality control (QC) limits. 8. Matrix Spike (MS) and Matrix Spike Duplicate (MSD) Results TriMatrix analyzed an MS and MSD using sample MSB-WSP-PRE-UNF for the spike. The percent recoveries and relative percent differences (RPDs) were within the laboratoryestablished QC limits with a few very minor exceptions that did not warrant sample qualification. 9. Laboratory Control Sample (LCS) Results The LCS recoveries were within laboratory-established QC limits.

92 Data Validation Report Midland/Saginaw Dioxin Site Municipal Water Sampling Site TriMatrix Laboratories, Inc. Laboratory Project #: Internal Standard Results The internal standard area counts were within -50 percent to +100 percent of the area counts in the associated continuing calibration standard. The retention time of the internal standards did not vary more than ±30 seconds from the retention time of the associated continuing calibration standard. 11. Field Duplicate Results Sample MSB-WSP-PRE-UNF D is a duplicate of sample MSB-WSP-PRE-UNF Both the field duplicate and parent sample were non-detect for all target VOCs except acetone which was detected in both samples below the reporting limit at similar concentrations. This indicates acceptable field precision. 12. Compound Identification The chromatograms, mass spectra, and quantitation report were spot-checked. TriMatrix identified and reported detected target compound concentrations correctly for those that were spot-checked. 13. Overall Assessment Several results were detected below the reporting limit and flagged J by the laboratory. These flags are accepted and these results should be considered estimated. The VOC data are acceptable for use as qualified based on the information received.

93 Data Validation Report Midland/Saginaw Dioxin Site Municipal Water Sampling Site TriMatrix Laboratories, Inc. Laboratory Project #: SVOCs BY SW-846 METHOD 8270C 1. Samples The following table summarizes the samples for which this data validation is being conducted. Samples Lab ID Matrix Date Collected Date Prepared Date Analyzed MSB-SAG-POS-UNF Water 5/26/2010 MSB-MID-POS-UNF Water 5/26/2010 MSB-WSP-PRE-UNF Water 5/27/2010 6/2/2010 6/14/2010 MSB-WSP-PRE-UNF D Water 5/27/2010 6/15/2010 6/16/2010 MSB-WSP-PRE-FIL Water 5/27/2010 MSB-BAY-PRE-UNF Water 5/27/2010 MSB-BAY-PRE-FIL Water 5/27/2010 6/2/2010 6/14/2010 MSB-BAY-POS-UNF Water 5/27/2010 6/2/2010 6/15/2010 6/14/2010 6/16/2010 MSB-Equipment-FIL Water 5/27/2010 6/2/2010 6/14/ Holding Times The samples were analyzed within the required holding time limit of 7 days from sample collection to extraction and 40 days from extraction to analysis except for as noted below. Note that the laboratory re-extracted and re-analyzed seven of the samples because of low surrogate recovery and the holding times were exceeded in these seven samples. The detected results for these seven samples should be considered estimated and were flagged J, if not already flagged J by the laboratory due to results being below the reporting limit. The quantitation limits for non-detected results in these samples were flagged UJ as estimated. 3. GC/MS Instrument Performance Check The instrument performance check using decafluorotriphenylphosphine (DFTPP) met the ion abundance criteria specified in method 8270C. 4. Initial Calibration For the initial calibration, the percent relative standard deviations (%RSD) for target compounds were less than 30. The relative response factor (RRF) was greater than 0.05 for target analytes.

94 Data Validation Report Midland/Saginaw Dioxin Site Municipal Water Sampling Site TriMatrix Laboratories, Inc. Laboratory Project #: CCV Results The percent differences for the CCV standards for all target compounds were within the control limit of less than or equal to 20 percent. 6. Blanks A method blank was analyzed with the SVOC analysis and was free of target compound contamination above the reporting limit except for as follows. For the method blank associated with the samples analyzed on June 14, 2010, butyl benzyl phthalate was detected below the reporting limit at 0.13 µg/l. Because butyl benzyl phthalate was detected in the samples analyzed on this date below the reporting limit and at similar concentrations, the results were flagged U as not detected. For the method blank associated with the samples analyzed on June 16, 2010, the following compounds were detected below the reporting limit in the method blank: benzo(a)anthracene; benzo(a)pyrene; benzo(b)fluoranthene; benzo(k)fluoranthene; butyl benzyl phthalate; chrysene; butyl benzyl phthalate; di-n-ocytl phthalate; bis(2-ethylhexyl) phthalate; fluoranthene; indeno(1,2,3-cd) pyrene; phenanthrene; and pyrene. The following compounds wee detected above the reporting limit in the method blank: di-n-butyl phthalate at 2.0 µg/l and phenol at 0.88 µg/l. Similar concentrations to the blank concentrations were flagged U as not detected in accordance with data validation guidance. 7. Surrogate Results The surrogate recovery results were within the laboratory-established QC limits except for as follows. Several of the samples had low surrogate recoveries for two or three of the phenol surrogates. Detected results for phenols in these samples were flagged J as estimated and the reporting limits for non-detected results were flagged UJ as estimated due to the low surrogate recoveries. These samples were re-extracted and re-analyzed because of the low surrogate recoveries with better surrogate results. In some instances one of the phenol surrogates was outside QC limits. According to the data validation guidance, no action is required when only one surrogate is outside QC limits. However, because these re-analyses were outside holding time criteria, all results required qualification. The low phenolic surrogate recoveries are most likely due to matrix interference associated with the phenols, the acid extractable compounds. This is supported by the fact that in the MS and

95 Data Validation Report Midland/Saginaw Dioxin Site Municipal Water Sampling Site TriMatrix Laboratories, Inc. Laboratory Project #: MSD there were low recoveries for pentachlorophenol; phenol; 2,4,5-trichlorophenol; and 2,4,6- trichlorophenol (see discussion below). In addition, in the re-extraction and analysis of the samples, phenol-d6 still had low recoveries. 8. MS and MSD Results TriMatrix analyzed an MS and MSD using sample MSB-WSP-PRE-UNF for the spike. The percent recoveries and RPDs were within the laboratory-established QC limits except as follows. The following compounds were detected low in the MS and/or MSD: Caprolactam; pentachlorophenol; phenol; 2,4,6-trichlorophenol; and 2,4,5-trichlorophenol. The quantitation limits for these compounds were flagged UJ as estimated due to possible matrix interference. 9. LCS Results The percent recoveries for the LCS results were within the laboratory-established QC limits except for as follows. Caprolactam and pentachlorophenol were detected low in each LCS analyzed with the samples. The quantitation limits for Caprolactam and pentachlorophenol were flagged UJ as estimated due to possible matrix interference. 10. Internal Standard Results The internal standard area counts were within -50 percent to +100 percent of the area counts in the associated continuing calibration standard except for as follows. In a few of the samples perylene-d12 was detected slightly above the QC limit. Detected results for samples quantitated with this internal standard were flagged J as estimated. The retention time of the internal standards did not vary more than ±30 seconds from the retention time of the associated continuing calibration standard. 11. Field Duplicate Results Sample MSB-WSP-PRE-UNF D is a duplicate of sample MSB-WSP-PRE-UNF Most results were non-detect or below the reporting limit. Correlation between the parent and duplicate sample were acceptable. 12. Compound Identification The chromatograms, mass spectra, and quantitation report were spot-checked. TriMatrix identified and reported detected target compound concentrations correctly for those that were spot-checked.

96 Data Validation Report Midland/Saginaw Dioxin Site Municipal Water Sampling Site TriMatrix Laboratories, Inc. Laboratory Project #: Overall Assessment Several results were detected below the reporting limit and flagged J by the laboratory. These results should be considered estimated. There SVOC data are acceptable for use as qualified based on the information received. PCBS BY SW-846 METHOD Samples The following table summarizes the samples for which this data validation was conducted. Samples Lab ID Matrix Date Collected Date Prepared Date Analyzed MSB-SAG-POS-UNF Water 5/26/2010 6/2/2010 6/7/2010 MSB-MID-POS-UNF Water 5/26/2010 6/2/2010 6/7/2010 MSB-WSP-PRE-UNF Water 5/27/2010 6/2/2010 6/7/2010 MSB-WSP-PRE-UNF D Water 5/27/2010 6/2/2010 6/7/2010 MSB-WSP-PRE-FIL Water 5/27/2010 6/2/2010 6/7/2010 MSB-BAY-PRE-UNF Water 5/27/2010 6/2/2010 6/7/2010 MSB-BAY-PRE-FIL Water 5/27/2010 6/2/2010 6/7/2010 MSB-BAY-POS-UNF Water 5/27/2010 6/2/2010 6/7/2010 MSB-Equipment-FIL Water 5/27/2010 6/2/2010 6/7/ Holding Times The sample was analyzed within the required holding time limit of 7 days from sample collection to extraction and 40 days from extraction to analysis. 3. Initial Calibration The initial calibration gave acceptable results. The RSD was less than 20 percent as required between calibration factors (CF). 4. CCV Results The CF for each analyte calculated from the continuing calibration verification standard did not exceed a percent difference of more than ± 15 percent when compared to the mean CF from the initial calibration curve.

97 Data Validation Report Midland/Saginaw Dioxin Site Municipal Water Sampling Site TriMatrix Laboratories, Inc. Laboratory Project #: Blanks A method blank was analyzed with the samples as required and was free of target compound contamination above the reporting limit. 6. Surrogates The surrogate recoveries were within the laboratory-established QC limits for percent recovery. 7. MS and MSD Results TriMatrix analyzed an MS and MSD using sample MSB-WSP-PRE-UNF for the spike. The percent recoveries and RPDs were within the laboratory-established QC limits. 8. LCS Results The LCS recovery was within the laboratory-established QC limits. 9. Field Duplicate Results Sample MSB-WSP-PRE-UNF D is a duplicate of sample MSB-WSP-PRE-UNF Both the field duplicate and parent sample were non-detect for all target PCBs indicating good field precision. 10. Compound Identification The chromatograms were spot-checked and it was confirmed that PCBs were not detected in the samples. 11. Overall Assessment The data are acceptable for use based on the information received.

98 Data Validation Report Midland/Saginaw Dioxin Site Municipal Water Sampling Site TriMatrix Laboratories, Inc. Laboratory Project #: PESTICIDES BY SW-846 METHOD 8081A 1. Samples The following table summarizes the samples for which this data validation was conducted. Samples Lab ID Matrix Date Collected Date Prepared Date Analyzed MSB-SAG-POS-UNF Water 5/26/2010 6/2/2010 6/12/2010 MSB-MID-POS-UNF Water 5/26/2010 6/2/2010 6/12/2010 MSB-WSP-PRE-UNF Water 5/27/2010 6/2/2010 6/12/2010 MSB-WSP-PRE-UNF D Water 5/27/2010 6/2/2010 6/12/2010 MSB-WSP-PRE-FIL Water 5/27/2010 6/2/2010 6/12/2010 MSB-BAY-PRE-UNF Water 5/27/2010 6/2/2010 6/12/2010 MSB-BAY-PRE-FIL Water 5/27/2010 6/2/2010 6/14/2010 MSB-BAY-POS-UNF Water 5/27/2010 6/2/2010 6/14/2010 MSB-Equipment-FIL Water 5/27/2010 6/2/2010 6/15/ Holding Times The sample was analyzed within the required holding time limit of 7 days from sample collection to extraction and 40 days from extraction to analysis. 3. Instrument Performance Check TriMatrix ran a performance evaluation mixture (PEM) standard to evaluate their instrument performance. The percent breakdown was less than 20% for 4,4 -DDT and endrin, as required. 4. Initial Calibration The initial calibration gave acceptable results. The RSD was less than 20 percent as required between CFs. 5. CCV Results The average of the CFs for target analytes calculated from the continuing calibration verification standard did not exceed a percent difference of more than ± 15 percent when compared to the mean CF from the initial calibration curve.

99 Data Validation Report Midland/Saginaw Dioxin Site Municipal Water Sampling Site TriMatrix Laboratories, Inc. Laboratory Project #: Blanks A method blank was analyzed with the samples as required and was free of target compound contamination above the reporting limit. 7. Surrogates The surrogate recoveries were within the laboratory-established QC limits for percent recovery. Note that there was one instance when one of the four surrogates was above the QC limit by one percent. No qualification was applied for this minor discrepancy. 8. MS and MSD Results TriMatrix analyzed an MS and MSD using sample MSB-WSP-PRE-UNF for the spike. The percent recoveries nd RPDs were within the laboratory-established QC limits except for as follows. Several pesticides were detected slightly above the QC limits and outside the QC limits for RPD. Because most of these compounds were not detected in the samples, qualifications were not required. The exceptions were delta-bhc and endrin aldehyde. Detected results for these two compounds were flagged J as estimated due to potential matrix interferences. Methoxychlor was detected low in the MSD. The quantiation limits for methoxychlor were flagge UJ as estimated due to potential matrix interferences. 9. LCS Results The LCS recoveries were within the laboratory-established QC limits. One of two LCS duplicate samples for toxaphene slightly exceeded the RPD QC limit. No qualification was applied for this minor discrepancy. 10. Field Duplicate Results Sample MSB-WSP-PRE-UNF D is a duplicate of sample MSB-WSP-PRE-UNF Both the field duplicate and parent sample were non-detect for all target pesticides except one which indicates good field precision. In the field duplicate there was a detection of endrin aldehyde below the reporting limit which was not detected in the parent sample. This does not affect the data usability because the detection was below the reporting limit and is considered estimated.

100 Data Validation Report Midland/Saginaw Dioxin Site Municipal Water Sampling Site TriMatrix Laboratories, Inc. Laboratory Project #: Compound Identification The chromatograms were spot-checked and it was confirmed that reported pesticides were detected in the samples. 12. Overall Assessment The data are acceptable for use based on the information received. TAL METALS BY SW-846 METHODS 6010B, 6020A, AND 7470A 1. Samples The following table summarizes the samples for which this data validation is being conducted. Samples Lab ID Matrix Date Collected MSB-SAG-POS-UNF Water 5/26/2010 MSB-MID-POS-UNF Water 5/26/2010 MSB-WSP-PRE-UNF Water 5/27/2010 MSB-WSP-PRE-UNF D Water 5/27/2010 MSB-WSP-PRE-FIL Water 5/27/2010 MSB-BAY-PRE-UNF Water 5/27/2010 MSB-BAY-PRE-FIL Water 5/27/2010 MSB-BAY-POS-UNF Water 5/27/2010 MSB-Equipment-FIL Water 5/27/2010 Date Analyzed 6/7/2010 6/8/ Holding Times The samples were analyzed within the required holding time limit of 28 days from sample collection to analysis for mercury and 180 days from sample collection to analysis for all other metals. 3. Calibrations The initial calibration verification and continuing calibration verification standards were within the QC limits of 90 to 110 percent recovery and 85 to 115 percent recovery for mercury.

101 Data Validation Report Midland/Saginaw Dioxin Site Municipal Water Sampling Site TriMatrix Laboratories, Inc. Laboratory Project #: Blank Results A method blank was analyzed with the samples and was free of target analyte contamination above the reporting limits. 5. Interference Check Sample (ICS) Results The ICS solutions A and AB were analyzed. The recoveries in the ICS solution AB were within the QC limits of 80 to 120 percent recovery. 6. LCS Results The LCS recoveries were within the laboratory-established QC limits for target analytes. 7. MS and MSD Results TriMatrix analyzed an MS and MSD using sample MSB-WSP-PRE-UNF for the spike. The percent recoveries and RPDs were within the laboratory-established QC limits. 8. ICP Serial Dilution The percent difference for the serial dilution exceeded the 10 percent difference QC limit for some analytes. Because results for these analytes were not detected at greater than 50 times the detection limit in the samples, no qualification was required. 9. Field Duplicate Results Sample MSB-WSP-PRE-UNF D is a duplicate of sample MSB-WSP-PRE-UNF The RPDs between the field duplicate and parent sample were acceptable (ranged from 0 to 61 RPD). 10. Overall Assessment Some metals results were flagged J by TriMatrix because they were detected below the reporting limit. These results should be considered estimated. The metals data are acceptable for use based on the information received.

102 Data Validation Report Midland/Saginaw Dioxin Site Municipal Water Sampling Site TriMatrix Laboratories, Inc. Laboratory Project #: MISCELLANEOUS PARAMETERS (Cyanide by SW-846 Method 9012A and TSS by SM 2540 D) 1. Samples The following table summarizes the samples for which this data validation is being conducted. Samples Lab ID Matrix Date Collected Parameter Analyzed MSB-SAG-POS-UNF Water 5/26/2010 Cyanide MSB-MID-POS-UNF Water 5/26/2010 Cyanide MSB-WSP-PRE-UNF Water 5/27/2010 Cyanide, TSS MSB-WSP-PRE-UNF D Water 5/27/2010 Cyanide, TSS MSB-WSP-PRE-FIL Water 5/27/2010 Cyanide MSB-BAY-PRE-UNF Water 5/27/2010 Cyanide, TSS MSB-BAY-PRE-FIL Water 5/27/2010 Cyanide MSB-BAY-POS-UNF Water 5/27/2010 Cyanide MSB-Equipment-FIL Water 5/27/2010 Cyanide Date Analyzed 6/2/2010 6/7/ Holding Times All holding time limits were acceptable. The required holding time limit for each parameter as follows: 3. Calibrations 14 days for cyanide 7 days for TSS CCV standards were analyzed with the cyanide analysis and were within the QC limits of 85 to 115 percent recovery. 4. Blank Results Blanks were analyzed with the cyanide and TSS analyses. The blanks contained no detections above the reporting limit for target analytes.

103 Data Validation Report Midland/Saginaw Dioxin Site Municipal Water Sampling Site TriMatrix Laboratories, Inc. Laboratory Project #: LCS Results LCSs were analyzed with the cyanide and TSS analyses. The LCS recoveries were within the laboratory-established QC limits for target analytes. 6. MS and MSD Results An MS and MSD were analyzed with the cyanide analysis. The percent recoveries and RPD were within the QC limits. 7. Duplicate Results A laboratory duplicate was analyzed with the TSS analysis. Both the laboratory duplicate and parent sample were non-detect for TSS. 8. Overall Assessment The cyanide and TSS data are acceptable for use based on the information received.

104 Data Validation Report Midland/Saginaw Dioxin Site Municipal Water Sampling Site TriMatrix Laboratories, Inc. Laboratory Project #: ATTACHMENT TRIMATRIX LABORATORIES, INC. RESULTS SUMMARY WITH QUALIFIERS

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