On March 6, 2014, 17 shallow soil samples were collected along the proposed trail alignment according to

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LAKE EWAUNA TRAIL LEVEL 2 FIELD SAMPLING ASSESSMENT the proposed alignment (Figure 1). The trail will also include the installation of a geothermal snow melt system, allowing for year round use of the trail with minimal maintenance. The geothermal supply and return lines will be constructed under the trail in excavations not expected to exceed 3 feet. Contaminants of Concern Due to historical activities of the former lumber mill, soil and groundwater may be contaminated with petroleum products, PAHs, wood treating chemicals such as pentachlorophenol (PCP), dioxins, furans, pesticides, solvents, and inorganic constituents such as lead and arsenic (DEQ, 2013a). Sampling Approach and Locations On March 6, 2014, 17 shallow soil samples were collected along the proposed trail alignment according to the Draft Sampling and Plan prepared in February 2014 (Figure 1) (CH2M HILL, 2014). Fifteen of the 17 soil samples were collected to a maximum of one foot bgs. The remaining two soil samples (SE 4 and SE 5) were collected from geotechnical test pits, excavated by backhoe, located in the general location of the proposed bridge footings. Multi incremental sampling was used to represent the soil quality for these locations. Soil was homogenized over the sample interval prior to sampling. All samples were analyzed for TPH, PAHs, PCP, and metals (arsenic, barium, chromium, cadmium, lead, mercury, selenium, and silver). Note that locations SE 8 and SE 13 are the closest sampling locations to the areas of wetland removal fill activities. These sampling locations, as well as wetland removal fill areas, are called out on Figure 1. Investigation s Soil logs and sampling details for the shallow soil samples are contained in the field notes attached as Appendix A. Dark brown soil with the presence of wood waste (sawdust) and red volcanic rock was commonly noted in the sampling excavations. Field notes indicate that sample location SE 15 was shifted in the field to avoid an area with recent placement of bark mulch. The two geotechnical test pits, SE 4 and SE 5, appeared to be completed in fill material along the bioswale. SE 4, approximately 12 feet north of the bioswale, was completed to a depth of 3.5 feet bgs. Groundwater was encountered at a depth of 3 feet bgs. Fill in this area appeared to be pumice with a green gray silt layer. SE 5, located approximately 30 feet south of the bioswale, was completed to a depth of 6 feet bgs. Fill debris was encountered in this location including bricks and logs, and a strong diesel or wood waste odor was observed. A sheen was observed in the excavation, but could not be replicated with a bag sheen test. Representative photos of the sampling locations are included as Appendix B. Analytical results for TPH, PAHs, PCP, and metals are included in Table 1 and laboratory reports are included as Appendix C. These results were evaluated in the following three step screening process: Initial Risk Based Screening (Table 1) Analytical results were compared to the most conservative DEQ risk based concentrations (RBCs) from the Table of Generic Risk Based Concentrations for Petroleum Constituents and Total Petroleum Hydrocarbons (DEQ, 2012). The exposure scenarios of soil ingestion, dermal contact and inhalation, and leaching to groundwater, both for residential receptors, were used for comparison. Metals concentrations were compared to the Regional 95% UPL Default Background Concentrations for Metals in Soil, the Basin and Range Region, from Development of Oregon Background Metals Concentrations in Soil (DEQ, 2013b). Risk to Site Workers (Table 2) Constituents which exceeded RBCs in the initial screening were further screened to evaluate risk to site workers. Risk receptors were selected for the exposure scenario of soil ingestion, dermal contact and inhalation from DEQ s Table of Generic Risk Based Concentrations for Petroleum Constituents and Total Petroleum Hydrocarbons. These included the construction and excavation worker receptor scenarios. RBCs for the occupational receptor in the scenario of soil leaching to groundwater were also included for comparison with site data. Constituents were compared to the more conservative of these RBCs. 2

LAKE EWAUNA TRAIL LEVEL 2 FIELD SAMPLING ASSESSMENT Waste Screening Evaluation (Table 3) Total metals results for all soil samples were compared to 20 times the Toxicity Characteristic Leaching Procedure (TCLP) limits to assess whether soil will require hazardous waste handling according to EPA regulation. All samples had detected concentrations of TPH Diesel, TPH Oil, multiple PAHs, and metals. Six of 17 samples had detected concentrations of PCP, but no concentrations exceeded the associated RBCs. RBCs were exceeded for the two TPH fractions (TPH Diesel and TPH Oil) and two PAHs (naphthalene and benz(a)pyrene) in at least one sample. In addition, six metals (arsenic, cadmium, lead, mercury, selenium, and silver) exceeded regional background concentrations in at least one sample. The geotechnical test pits had the most frequent exceedances of RBCs; including naphthalene and benzo(a)pyrene at SE 4, and TPH Diesel, TPH Oil, naphthalene, and benzo(a)pyrene at SE 5. All six previously listed metals were above regional background concentrations in both samples. Exceedances of the residential RBC for soil ingestion, dermal contact and inhalation for benzo(a)pyrene also occurred in SE 2, SE 7, SE 13, SE 15, and SE 17. RBC exceedances of more than one metal occurred in seven samples: SE 3, SE 4, SE 5, SE 6, SE 7, SE 13, and SE 15. The remaining 8 out of 15 metals exceedances occurred only for arsenic. Although arsenic was above the most conservative RBC in 15 of the 17 samples, only one sample (SE 4) exceeded the regional background concentration of 12 mg/kg. Two other metals concentrations lead concentrations measured in SE 4 and SE 5 exceeded both the regional background concentration and the RBC for soil ingestion, dermal contact and inhalation. Construction and excavation worker RBCs for soil ingestion, dermal contact and inhalation, as well as the occupational receptor scenario for leaching to groundwater, were used to evaluate constituents with exceedances of most conservative RBCs. Of these, lead is the only constituent with exceedances of the most conservative RBC (the occupational receptor scenario for soil leaching to groundwater), at a concentration of 30 mg/kg. However, this value was calculated assuming that all lead within the soil will leach into water during a routine leaching test, as discussed in Section B.3.4 of DEQ s 2012 Risk Based Decision Making for the Remediation of Petroleum Contaminated Sites. The lead leachate concentration must not exceed 1.5 mg/l, which is 100 times greater than the RBC for tap water (DEQ, 2012). To evaluate site specific leaching potential of the samples with lead exceedances, Toxicity Characteristic Leaching Potential (TCLP) was analyzed for those samples with the highest lead concentrations, SE 4 and SE 5, resulting in a value of 0.03 mg/l for SE 4 and a non detect for SE 5. Given that TCLP data is available for soil samples collected at the property, it is appropriate to compare these values to the lead leachate concentration limit of 1.5 mg/l. This comparison shows that the site specific TCLP is significantly lower than the maximum allowable leachate concentration, indicating that the lead concentrations observed in the site soils will not result in groundwater exceeding lead RBCs in tap water. The results of the two stage risk evaluation indicates no sitespecific protocols will be required to protect site workers. In addition to assessing risk to site workers, an evaluation of whether excavated soil will need special handling or disposal requirements was conducted (Table 3). TCLP analysis is designed to simulate landfill conditions and assesses the mobility of analytes in wastes. EPA regulated wastes are defined with TCLP limits under RCRA (40 CFR Part 261). The contaminants of concern at the site which could classify site soils as hazardous waste are metals. Therefore, total metals concentrations were evaluated using the 20 times TCLP rule. This rule described in Use of Total Waste in Toxicity Characteristic Determinations (EPA, 1994) indicates that total metals analysis can be used as a proxy for TCLP results with the limits at 20 times those used for TCLP. Lead is the only total metal with exceedances of the 20 times TCLP limits at locations SE 4 and SE 5. TCLP was analyzed as a result of these exceedances and resulting values were below the TCLP limit of 5 mg/l at 0.03 mg/l and nondetect, respectively. Consequently, soil at the site will require contaminated media management and may need to be disposed of at a Subtitle D landfill handling municipal solid waste.

LAKE EWAUNA TRAIL LEVEL 2 FIELD SAMPLING ASSESSMENT Conclusion and Recommendations This Level 2 Preliminary Site Investigation included the collection of 17 shallow soil samples along the proposed project alignment. A risk evaluation to site workers indicated that while soil collected at the site exceeds some of the most conservative DEQ RBCs in some areas, it does not pose an unacceptable risk to current occupational, construction, and/or excavation workers. Although the lead concentrations in soil were greater than the RBCs for soil leaching to groundwater, this value is calculated using the assumption that all lead from the soil would leach to water during a standard leaching test. Site specific TCLP data indicates that the lead leachate is significantly lower than the concentration needed to cause groundwater to exceed the lead RBC for tap water. Site soils and groundwater do not pose an unacceptable risk to site workers and no site specific protocols are required to address worker safety. An evaluation of disposal requirements of site soils was conducted using the 20 times TCLP rule established by EPA. Though lead exceeded the 20 times TCLP rule for two samples, TCLP results were below the limits requiring hazardous waste disposal. However, site soils will still require handling under a contaminated media management plan, which will include provisions for offsite disposal as a nonhazardous waste. Site groundwater was not sufficiently characterized in this investigation to assess disposal requirements; therefore, it is likely that groundwater will need to be characterized and managed during the excavations for the bridge footings and any other excavation deep enough to encounter groundwater. References CH2M HILL. 2013. Hazardous Materials Corridor Study, Lake Ewauna Trail, Klamath Avenue to Spring Street, Klamath County, Klamath Falls, Oregon. February. CH2M HILL. 2014. Draft Sampling and Plan, Lake Ewauna Trail. Prepared for City of Klamath Falls. February. Oregon Department of Environmental Quality (DEQ). 2013a. Environmental Cleanup Site Information (ECSI) Database, Site Summary Report Details for Site ID 2307, Modoc Lumber (Former) Study Area. Accessed January 2013. http://www.deq.state.or.us/lq/ecsi/ecsidetail.asp?seqnbr=2307 Oregon Department of Environmental Quality (DEQ). 2013b. Development of Oregon Background Metals Concentrations in Soil. March. Oregon Department of Environmental Quality (DEQ). 2012. Risk Based Decision Making for the Remediation of Petroleum Contaminated Sites, Table of Generic Risk Based Concentrations for Petroleum Constituents and Total Petroleum Hydrocarbons. Updated July 2012. United States Environmental Protection Agency (EPA). 1994. Use of Total Waste in Toxicity Characteristic Determinations. RCRA Hotline Report. January. Accessed September 2015. http://yosemite.epa.gov/osw/rcra.nsf/documents/fa78484d3bd7d29c852565da006f0acf 4

Appendix A Field Notes

Appendix B Representative Photographs

Appendix C Laboratory Reports

Bioswale Bioswale SE-2 SE-3 SE-4 SE-5 SE-6 SE-7 SE-8 Wetland Removal-Fill Area (Close Up 1) SE-9 SE-1 SE-10 SE-8 Close Up 1 Close Up 2 SE-11 SE-13 SE-13 SE-12 SE-16 Wetland Removal-Fill Area (Close Up 2) SE-14 SE-15 SE-17 Site Location LEGEND Soil Sample Location Proposed Trail Alignment Wetland Removal-Fill Permanent Temporary 0 125 250 500 Feet Vicinity road map source: Esri, DeLorme, NAVTEQ, TomTom, USGS, Intermap, ipc, NRCAN, Esri Japan, METI, Esri China (Hong Kong), Esri (Thailand) Figure 1 Soil Sample Locations and Removal-Fill along Proposed Trail Alignment Lake Ewauna Trail Level 2 Field Sampling Assessment Klamath Falls, Klamath County \\ROSA\PROJ\ODOT\462902LAKEEWAUNA\TASK 2 - SURVEY\GIS\MAPFILES\SAMPLELOCATIONS2.MXD GGEE 6/24/2015 4:00:18 PM

TABLE 1 Initial Risk Based Screening of Soil Analytical s for PAHs, SVOCs, and Metals Lake Ewauna Trail Level 2 Field Sampling Assessment Sample Location RBC (Soil ingestion, SE 1 SE 2 SE 3 SE 4 SE 5 SE 6 SE 7 SE 8 SE 9 SE 10 SE 11 SE 12 SE 13 SE 14 SE 15 SE 16 SE 17 RBC Background dermal contact and Sample (Leaching to Metals 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 inhalation) 1 groundwater) 2 Concentrations 3 Sample Depth (ft bgs) Residential Scenario 1 1 1 0 3.5 0 6 1 1 1 1 1 1 1 1 1 1 1 1 Moisture (%) 19.9 15.2 57.8 38.8 22.2 23.3 15.2 8 16.3 26.4 15.2 12.1 13.8 16.2 47.8 12.9 8.8 Total Petroleum Hydrocarbons (TPH) (mg/kg) TPH Diesel 1,100 9,500 10 J 13.5 J 13.6 J 331 J 2,250 6.89 J 116 J 18.5 J 41.2 46.8 83.6 21.7 J 113 J 15 J 37.2 J 7.86 J 7.87 J TPH Oil 2,800 > 1,000,000 64.1 J 104 J 93.2 J 2,300 10,000 87 J 1,750 J 79.8 330 276 534 387 1,580 J 136 260 48.6 J 64.6 J Polynuclear Aromatic Hydrocarbons (PAHs) (µg/kg) Naphthalene 4,600 87 0.67 5.03 1.37 181 227 9.08 18.7 3.09 4.84 2.7 J 2.85 J 0.34 J 15.5 2.89 J 7.37 J 4.41 25.9 2 Methylnaphthalene 0.11 U 3.04 0.25 J 143 261 5.45 J 10.2 2.28 J 2.74 J 1.37 J 1.34 J 0.2 J 7.98 1.62 J 4.5 J 3.23 12.6 1 Methylnaphthalene 0.12 U 1.34 0.23 U 63.9 142 2.92 J 4.92 J 1.37 J 1.43 J 0.65 U 0.89 J 0.11 U 3.6 J 1.12 J 3.12 J 1.79 J 5.4 Acenaphthylene 0.56 J 13.4 0.15 U 123 107 6.68 17.1 2.42 J 6.48 1.41 J 0.86 J 0.12 J 7.48 1.94 J 5.18 J 4.59 14.5 Acenaphthene 4,700,000 0.094 U 0.74 0.23 J 8.81 71.8 0.98 U 0.89 U 0.41 U 0.45 U 0.51 U 0.45 U 0.085 U 0.88 J 0.45 U 1.45 U 0.7 J 3.16 Fluorene 3,100,000 0.066 U 1.67 0.14 J 26.3 49.2 0.89 J 1.6 J 0.6 J 0.95 J 0.4 J 0.32 U 0.061 J 1.24 J 0.5 J 1.91 J 0.69 J 2.92 Phenanthrene 0.49 J 14.8 1.85 322 315 14.4 28.2 5.31 15.6 5.54 3.2 0.28 J 19.6 4.74 22.9 11.5 121 Anthracene 23,000,000 0.56 J 42.6 1.73 50.4 61.9 4.76 J 7.14 3.7 4.21 0.89 J 0.54 J 0.1 J 5.02 J 1.07 J 5.85 J 6.76 47.1 Fluoranthene 2,300,000 2.67 58.3 6.37 382 295 22.2 47.4 7.44 30.9 7.82 2.82 J 0.46 J 29.6 5.35 29 16.6 154 Pyrene 1,700,000 2.68 74 5.35 428 427 25.9 48.7 6.07 39.6 7.58 3.38 0.69 41.3 4.92 30.6 15.5 105 Benz(a)anthracene 150 3,500 5.57 31.9 2.93 63.6 50.6 9.47 22.6 2.09 J 13.1 1.63 J 0.45 U 0.085 U 15.3 1.56 J 12.5 5.74 38.4 Chrysene 14,000 5.56 37.7 2.93 76.1 101 10.4 21.2 2.57 J 17.6 2.15 J 1 J 0.069 U 15.4 1.98 J 11.8 8.49 38.1 Benzo(b)fluoranthene 150 4,000 12 86.2 5.01 102 73.9 14.8 48.8 4.14 23.7 3.19 J 0.48 U 2.4 45 3.85 21.6 21.4 53.8 Benzo(k)fluoranthene 1,500 4.53 24.2 1.65 25 40.6 6.45 J 12.8 1.29 J 7.05 0.47 U 0.42 U 0.079 U 0.81 U 1.08 J 10.2 5.27 14.7 Benzo(a)pyrene 15 900 7.63 44.8 3.18 46.1 66.7 12.8 30.2 2.06 J 14.6 0.52 U 0.47 U 1.33 39.6 1.67 J 17.4 8.1 16.3 Indeno(1,2,3 c,d)pyrene 150 5.32 33.6 2.26 33.2 27.8 13.5 23.8 0.49 U 8.99 1.53 J 0.55 U 0.1 U 21.1 0.54 U 8.87 J 16.2 11.2 Dibenz(a,h)anthracene 15 3,400 0.11 U 9.59 0.21 U 0.44 U 13.3 1.16 U 1.05 U 0.49 U 0.53 U 0.6 U 0.54 U 0.1 U 1.04 U 0.53 U 1.73 U 0.51 U 4.31 Benzo(g,h,i)perylene 6.52 64.1 3.18 70 71 29.3 77.1 2.99 12.4 0.56 U 0.49 U 1.82 58.6 2.92 J 19.3 28.5 17.3 Semi volatile Organic Compounds (µg/kg) Dibenzofuran 0.1 U 1.72 0.26 J 24.2 45.8 1.54 J 2.27 J 0.76 J 0.95 J 0.84 J 1.13 J 0.094 U 1.48 J 0.76 J 2.5 J 1.79 J 15 Pentachlorophenol 890 140 2 18.4 1.11 J 9.85 1.94 U 2.56 U 2.32 U 1.07 U 1.17 U 1.33 U 1.18 U 0.61 J 2.29 U 4.61 J 3.8 U 1.13 U 1.08 U Metals, dry weight (mg/kg) Arsenic 0.39 12 0.43 J 2.92 8.83 J 21 6.78 2.74 1.57 0.3 J 1.21 0.89 J 0.37 J 1.16 2.45 0.63 J 2.37 2.74 1.24 J Barium 15,000 790 60.1 94.1 92.3 297 410 202 120 45.7 83.2 75.5 82.1 74.3 99.1 54.4 97.1 213 60.6 Cadmium 39 0.81 0.097 U 0.18 J 1.18 U 3.13 3.03 0.32 J 0.67 J 0.099 U 0.24 J 0.33 J 0.33 J 0.096 J 0.35 J 0.11 J 0.7 J 0.45 J 0.23 J Chromium 120,000 100 4.18 15.5 15.9 40.6 30.8 22.1 14.4 4.74 11.4 12.3 6.66 16.6 12.1 6.19 14.3 14.9 14 Lead 400 30 29 3.62 22.5 6.61 J 461 687 40.4 35.4 14.5 17.9 4.91 2.99 4.66 34.6 3.6 8.42 18.4 11.1 Mercury 23 0.28 0.016 J 0.2 0.19 1.08 0.88 0.076 0.036 0.028 0.05 0.024 J 0.018 J 0.0064 J 0.064 0.039 0.032 0.048 0.027 Selenium 0.41 0.24 J 0.21 U 1.88 U 0.91 J 0.44 J 0.36 U 0.25 J 0.16 U 0.21 J 0.25 J 0.21 J 0.14 U 0.26 U 0.17 J 0.46 J 0.32 U 0.33 U Silver 390 0.42 0.23 J 0.13 U 1.18 U 1.5 J 1.53 J 0.22 U 0.11 U 0.099 U 0.087 U 0.12 U 0.12 U 0.086 U 0.16 U 0.093 U 0.23 U 0.2 U 0.22 J Metals, TCLP (µg/l) Lead 30.3 2.50 U NOTES: (1) = Table of Generic Risk Based Concentrations for Petroleum Constituents and Total Petroleum Hydrocarbons and Generic Remedy for Simple Risk Based Sites. Oregon DEQ. (Updated July, 2012) Residential receptor for soil ingestion, dermal contact and inhalation. (2) = Table of Generic Risk Based Concentrations for Petroleum Constituents and Total Petroleum Hydrocarbons and Generic Remedy for Simple Risk Based Sites. Oregon DEQ. (Updated July, 2012) Residential receptor for leaching to groundwater. (3) = Regional 95% UPL Default Background Concentrations for Metals in Soil (Basin and Range), from Oregon DEQ. 2013. Development of Oregon Background Metals Concentrations in Soil. March. Bold = Analyte Detected mg/kg = milligram per kilogram µg/kg = microgram per kilogram Shaded = Exceeds risk based concentration (RBC) value or background metals concentration. U = Not detected at specified detection limit J = Estimated value below reporting limit = not analyzed

TABLE 2 Soil Analytical s for Selected PAHs and Metals Evaluated for Risk to Site Workers Lake Ewauna Trail Level 2 Field Sampling Assessment Sample Location RBC (Soil ingestion, RBC (Leaching to SE 1 SE 2 SE 3 SE 4 SE 5 SE 6 SE 7 SE 8 SE 9 SE 10 SE 11 SE 12 SE 13 SE 14 SE 15 SE 16 SE 17 Sample dermal contact and inhalation) groundwater) 3 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 Sample Depth (ft bgs) Construction Worker 1 Excavation Worker 2 Occupational 1 1 1 0 3.5 0 6 1 1 1 1 1 1 1 1 1 1 1 1 Total Petroleum Hydrocarbons (TPH) (mg/kg) TPH Diesel 4,600 >Max >Max 10 J 13.5 J 13.6 J 331 J 2,250 6.89 J 116 J 18.5 J 41.2 46.8 83.6 21.7 J 113 J 15 J 37.2 J 7.86 J 7.87 J TPH Oil 11,000 >Max >Max 64.1 J 104 J 93.2 J 2,300 10,000 87 J 1,750 J 79.8 330 276 534 387 1,580 J 136 260 48.6 J 64.6 J Polynuclear Aromatic Hydrocarbons (PAHs) (µg/kg) Naphthalene 580,000 16,000,000 440 0.67 5.03 1.37 181 227 9.08 18.7 3.09 4.84 2.7 J 2.85 J 0.34 J 15.5 2.89 J 7.37 J 4.41 25.9 Benzo(a)pyrene 2,100 59,000 >Csat 7.63 44.8 3.18 46.1 66.7 12.8 30.2 2.06 J 14.6 0.52 U 0.47 U 1.33 39.6 1.67 J 17.4 8.1 16.3 Metals, dry weight (mg/kg) Arsenic 13 370 0.43 J 2.92 8.83 J 21 6.78 2.74 1.57 0.3 J 1.21 0.89 J 0.37 J 1.16 2.45 0.63 J 2.37 2.74 1.24 J Cadmium 150 4,300 0.097 U 0.18 J 1.18 U 3.13 3.03 0.32 J 0.67 J 0.099 U 0.24 J 0.33 J 0.33 J 0.096 J 0.35 J 0.11 J 0.7 J 0.45 J 0.23 J Lead 800 800 30 3.62 22.5 6.61 J 461 687 40.4 35.4 14.5 17.9 4.91 2.99 4.66 34.6 3.6 8.42 18.4 11.1 Mercury 93 2,600 0.016 J 0.2 0.19 1.08 0.88 0.076 0.036 0.028 0.05 0.024 J 0.018 J 0.0064 J 0.064 0.039 0.032 0.048 0.027 Selenium 0.24 J 0.21 U 1.88 U 0.91 J 0.44 J 0.36 U 0.25 J 0.16 U 0.21 J 0.25 J 0.21 J 0.14 U 0.26 U 0.17 J 0.46 J 0.32 U 0.33 U Silver 1,500 43,000 0.23 J 0.13 U 1.18 U 1.5 J 1.53 J 0.22 U 0.11 U 0.099 U 0.087 U 0.12 U 0.12 U 0.086 U 0.16 U 0.093 U 0.23 U 0.2 U 0.22 J NOTES: (1) = Table of Generic Risk Based Concentrations for Petroleum Constituents and Total Petroleum Hydrocarbons and Generic Remedy for Simple Risk Based Sites. Oregon DEQ. (Updated July, 2012) Construction Worker receptor for soil ingestion, dermal contact and inhalation. (2) = Table of Generic Risk Based Concentrations for Petroleum Constituents and Total Petroleum Hydrocarbons and Generic Remedy for Simple Risk Based Sites. Oregon DEQ. (Updated July, 2012) Excavation Worker receptor for soil ingestion, dermal contact and inhalation. (3) = Table of Generic Risk Based Concentrations for Petroleum Constituents and Total Petroleum Hydrocarbons and Generic Remedy for Simple Risk Based Sites. Oregon DEQ. (Updated July, 2012) Residential receptor for leaching to groundwater. Bold = Analyte Detected mg/kg = milligram per kilogram µg/kg = microgram per kilogram Shaded = Exceeds risk based concentration (RBC) value. U = Not detected at specified detection limit J = Estimated value below reporting limit = not analyzed

TABLE 3 Waste Screening Evaluation of Soil Analytical s for Metals Lake Ewauna Trail Level 2 Field Sampling Assessment Metals, dry weight (mg/kg) Sample Location SE 1 SE 2 SE 3 SE 4 SE 5 SE 6 SE 7 SE 8 SE 9 SE 10 SE 11 SE 12 SE 13 SE 14 SE 15 SE 16 SE 17 Sample TCLP Limit 1 20 x TCLP Limit (mg/l) (mg/kg) 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 3/6/2014 Sample Depth (ft bgs) 1 1 1 0 3.5 0 6 1 1 1 1 1 1 1 1 1 1 1 1 Arsenic 5.0 100 0.43 J 2.92 8.83 J 21 6.78 2.74 1.57 0.3 J 1.21 0.89 J 0.37 J 1.16 2.45 0.63 J 2.37 2.74 1.24 J Barium 100 2,000 60.1 94.1 92.3 297 410 202 120 45.7 83.2 75.5 82.1 74.3 99.1 54.4 97.1 213 60.6 Cadmium 1.0 20 0.097 U 0.18 J 1.18 U 3.13 3.03 0.32 J 0.67 J 0.099 U 0.24 J 0.33 J 0.33 J 0.096 J 0.35 J 0.11 J 0.7 J 0.45 J 0.23 J Chromium 5.0 100 4.18 15.5 15.9 40.6 30.8 22.1 14.4 4.74 11.4 12.3 6.66 16.6 12.1 6.19 14.3 14.9 14 Lead 5.0 100 3.62 22.5 6.61 J 461 687 40.4 35.4 14.5 17.9 4.91 2.99 4.66 34.6 3.6 8.42 18.4 11.1 Mercury 0.2 4 0.016 J 0.2 0.19 1.08 0.88 0.076 0.036 0.028 0.05 0.024 J 0.018 J 0.0064 J 0.064 0.039 0.032 0.048 0.027 Selenium 1.0 20 0.24 J 0.21 U 1.88 U 0.91 J 0.44 J 0.36 U 0.25 J 0.16 U 0.21 J 0.25 J 0.21 J 0.14 U 0.26 U 0.17 J 0.46 J 0.32 U 0.33 U Silver 5.0 100 0.23 J 0.13 U 1.18 U 1.5 J 1.53 J 0.22 U 0.11 U 0.099 U 0.087 U 0.12 U 0.12 U 0.086 U 0.16 U 0.093 U 0.23 U 0.2 U 0.22 J Metals, TCLP (mg/l) Lead 5.0 100 0.0303 0.0025 U NOTES: (1) = EPA regulatory levels for Toxicity Characteristic Leaching Procedure (TCLP) meeting the definition of EPA toxicity under RCRA (40 CFR Part 261) of D004 through D052. Bold = Analyte Detected mg/kg = milligram per kilogram mg/l = milligrams per Liter Shaded = Exceeds waste screening limit. U = Not detected at specified detection limit J = Estimated value below reporting limit = not analyzed

Appendix A Field Notes

Appendix B Representative Photographs

Appendix B Representative Shallow Soil Sampling Photographs March 2014 Lake Ewauna Trail Level 2 Preliminary Site Investigation Photograph B 1. Shallow soil sample location SE 1 (3/6/2014). Photograph B 2. Shallow soil sample location SE 2 (3/6/2014). Photograph B 3. Shallow soil sample location SE 3 (3/6/2014). Photograph B 4. Test pit location SE 4 (3/6/2014), near western pedestrian bridge footing.

Appendix B Representative Shallow Soil Sampling Photographs March 2014 Lake Ewauna Trail Level 2 Preliminary Site Investigation Photograph B 5. Excavation spoils from test pit location SE 5 (3/6/2014), near eastern pedestrian bridge footing. Photograph B 6. Shallow soil sample location SE 6 (3/6/2014). Photograph B 7. Shallow soil sample location SE 7 (3/6/2014). Photograph B 8. Shallow soil sample location SE 8 (3/6/2014). Location is adjacent to wetland removal fill area.

Appendix B Representative Shallow Soil Sampling Photographs March 2014 Lake Ewauna Trail Level 2 Preliminary Site Investigation Photograph B 9. Shallow soil sample location SE 9 (3/6/2014). Photograph B 10. Shallow soil sample location SE 10 (3/6/2014). Photograph B 11. Shallow soil sample location SE 11 (3/6/2014). Photograph B 12. Shallow soil sample location SE 12 (3/6/2014).

Appendix B Representative Shallow Soil Sampling Photographs March 2014 Lake Ewauna Trail Level 2 Preliminary Site Investigation Photograph B 13. Shallow soil sample location SE 13 (3/6/2014). Location is adjacent to wetland removal fill area. Photograph B 14. Shallow soil sample location SE 14 (3/6/2014). Photograph B 15. Shallow soil sample location SE 15 (3/6/2014). Photograph B 16. Shallow soil sample location SE 16 (3/6/2014).

Appendix B Representative Shallow Soil Sampling Photographs March 2014 Lake Ewauna Trail Level 2 Preliminary Site Investigation Photograph B 17. Shallow soil sample location SE 17 (3/6/2014).

Appendix C Laboratory Reports

ANALYTICAL REPORT For: Klamath Lake Ewauna ASL Report #: N1415 Project ID: 462902.05.03 Attn: Darren Hippenstiel/PDX cc: Bruce Pratt/CVO Pat Heins/PDX Authorized and Released By: Laboratory Project Manager Kathy McKinley (541) 758 0235 ext.23144 April 01, 2014 All analyses performed by CH2M HILL are clearly indicated. Any subcontracted analyses are included as appended reports as received from the subcontracted laboratory. The results included in this report only relate to the samples listed on the following Sample Cross Reference page. This report shall not be reproduced except in full, without the written approval of the laboratory. Any unusual difficulties encountered during the analysis of your samples are discussed in the attached case narratives. Accredited in accordance with NELAP: Oregon (100022) Arizona (0771) Louisiana (05031) Page 1 of 74

ASL Report #: N1415 Sample Receipt Comments We certify that the test results meet all NELAP requirements. Sample Cross Reference ASL Sample ID Client Sample ID /Time Collected Received N141501 SE 1 03/06/14 14:57 03/07/14 N141502 SE 2 03/06/14 15:18 03/07/14 N141503 SE 3 03/06/14 15:33 03/07/14 N141504 SE 4 03/06/14 13:22 03/07/14 N141505 SE 5 03/06/14 13:40 03/07/14 N141506 SE 6 03/06/14 16:45 03/07/14 N141507 SE 7 03/06/14 16:30 03/07/14 N141508 SE 8 03/06/14 16:10 03/07/14 N141509 SE 9 03/06/14 11:55 03/07/14 N141510 SE 10 03/06/14 11:36 03/07/14 N141511 SE 11 03/06/14 11:20 03/07/14 N141512 SE 12 03/06/14 10:48 03/07/14 N141513 SE 13 03/06/14 10:20 03/07/14 N141514 SE 14 03/06/14 09:55 03/07/14 N141515 SE 15 03/06/14 09:00 03/07/14 N141516 SE 16 03/06/14 08:28 03/07/14 N141517 SE 17 03/06/14 08:00 03/07/14 Page 2 of 74

CASE NARRATIVE GC/MS SEMI-VOLATILES ANALYSIS Lab Name: ASL SDG#: N1415 Project: Klamath--Lake Ewauna Project #: 462902.05.03 With the exceptions noted as flags, footnotes, or detailed in the section below; standard operating procedures were followed in the analysis of the samples and no problems were encountered or anomalies observed. All laboratory quality control samples were within established control limits, with any exceptions noted below, or in the associated QC summary forms. Each sample was analyzed to achieve the lowest possible reporting limit within the constraints of the method. For diluted samples, the reporting limits are adjusted for the dilution required. Calculations are performed before rounding to minimize errors in calculated values. All holding times were met and proper preservation noted for the methods performed on these samples, unless otherwise detailed in the section below, or in the sample receipt documentation. (s): SW8270C-SIM: SW3550 Surrogate Standard(s): Surrogate recovery of Terphenyl-d14(153%) in SE-5 did not meet acceptance criteria of 18-137%. Analytical Exception(s): Multi-incremental sampling was performed on N141504 and N141505. Many samples required dilutions due to heavy matrix interferences. Page 3 of 74 TH140402-10:02-N1415-S

Client Sample ID: SE-1 Sample : 03/06/14 Sample Time: 14:57 Type: Grab Lab Sample ID: N141501 Received: 03/07/14 Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 0.14 0.62 0.67 2-Methylnaphthalene 91-57-6 0.11 0.62 0.11 U 1-Methylnaphthalene 90-12-0 0.12 0.62 0.12 U Acenaphthylene 208-96-8 0.076 0.62 0.56 J Acenaphthene 83-32-9 0.094 0.62 0.094 U Dibenzofuran 132-64-9 0.10 0.62 0.10 U Fluorene 86-73-7 0.066 0.62 0.066 U Pentachlorophenol 87-86-5 0.25 1.25 2.00 Phenanthrene 85-01-8 0.065 0.62 0.49 J Anthracene 120-12-7 0.067 0.62 0.56 J Fluoranthene 206-44-0 0.086 0.62 2.67 Pyrene 129-00-0 0.094 0.62 2.68 Benzo(a)anthracene 56-55-3 0.093 0.62 5.57 Chrysene 218-01-9 0.076 0.62 5.56 Benzo[b]fluoranthene 205-99-2 0.099 0.62 12.0 Benzo(k)fluoranthene 207-08-9 0.087 0.62 4.53 Benzo(a)pyrene 50-32-8 0.097 0.62 7.63 Indeno(1,2,3-c,d)pyrene 193-39-5 0.11 0.62 5.32 Dibenzo(a,h)anthracene 53-70-3 0.11 0.62 0.11 U Benzo(g,h,i)perylene 191-24-2 0.10 0.62 6.52 Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 76 18-137 HM140331-11:50-N1415-S Page 4 of 74

Client Sample ID: SE-2 Sample : 03/06/14 Sample Time: 15:18 Type: Grab Lab Sample ID: N141502 Received: 03/07/14 Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 0.13 0.58 5.03 2-Methylnaphthalene 91-57-6 0.099 0.58 3.04 1-Methylnaphthalene 90-12-0 0.11 0.58 1.34 Acenaphthylene 208-96-8 0.072 0.58 13.4 Acenaphthene 83-32-9 0.088 0.58 0.74 Dibenzofuran 132-64-9 0.097 0.58 1.72 Fluorene 86-73-7 0.062 0.58 1.67 Pentachlorophenol 87-86-5 0.23 1.17 18.4 Phenanthrene 85-01-8 0.061 0.58 14.8 Anthracene 120-12-7 0.063 0.58 42.6 Fluoranthene 206-44-0 0.081 0.58 58.3 Pyrene 129-00-0 0.089 0.58 74.0 Benzo(a)anthracene 56-55-3 0.088 0.58 31.9 Chrysene 218-01-9 0.071 0.58 37.7 Benzo[b]fluoranthene 205-99-2 0.093 0.58 86.2 Benzo(k)fluoranthene 207-08-9 0.081 0.58 24.2 Benzo(a)pyrene 50-32-8 0.091 0.58 44.8 Indeno(1,2,3-c,d)pyrene 193-39-5 0.11 0.58 33.6 Dibenzo(a,h)anthracene 53-70-3 0.10 0.58 9.59 Benzo(g,h,i)perylene 191-24-2 0.096 0.58 64.1 Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 107 18-137 HM140331-11:50-N1415-S Page 5 of 74

Client Sample ID: SE-3 Sample : 03/06/14 Sample Time: 15:33 Type: Grab Lab Sample ID: N141503 Received: 03/07/14 Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 0.27 1.19 1.37 2-Methylnaphthalene 91-57-6 0.20 1.19 0.25 J 1-Methylnaphthalene 90-12-0 0.23 1.19 0.23 U Acenaphthylene 208-96-8 0.15 1.19 0.15 U Acenaphthene 83-32-9 0.18 1.19 0.23 J Dibenzofuran 132-64-9 0.20 1.19 0.26 J Fluorene 86-73-7 0.13 1.19 0.14 J Pentachlorophenol 87-86-5 0.47 2.38 1.11 J Phenanthrene 85-01-8 0.13 1.19 1.85 Anthracene 120-12-7 0.13 1.19 1.73 Fluoranthene 206-44-0 0.17 1.19 6.37 Pyrene 129-00-0 0.18 1.19 5.35 Benzo(a)anthracene 56-55-3 0.18 1.19 2.93 Chrysene 218-01-9 0.14 1.19 2.93 Benzo[b]fluoranthene 205-99-2 0.19 1.19 5.01 Benzo(k)fluoranthene 207-08-9 0.17 1.19 1.65 Benzo(a)pyrene 50-32-8 0.18 1.19 3.18 Indeno(1,2,3-c,d)pyrene 193-39-5 0.22 1.19 2.26 Dibenzo(a,h)anthracene 53-70-3 0.21 1.19 0.21 U Benzo(g,h,i)perylene 191-24-2 0.20 1.19 3.18 Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 91 18-137 HM140331-11:50-N1415-S Page 6 of 74

Client Sample ID: SE-4 Sample : 03/06/14 Sample Time: 13:22 Type: Grab Lab Sample ID: N141504 Received: 03/07/14 Dilution Factor: 5 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 0.56 2.44 181 2-Methylnaphthalene 91-57-6 0.42 2.44 143 1-Methylnaphthalene 90-12-0 0.47 2.44 63.9 Acenaphthylene 208-96-8 0.30 2.44 123 Acenaphthene 83-32-9 0.37 2.44 8.81 Dibenzofuran 132-64-9 0.40 2.44 24.2 Fluorene 86-73-7 0.26 2.44 26.3 Pentachlorophenol 87-86-5 0.96 4.88 9.85 Phenanthrene 85-01-8 0.26 2.44 322 Anthracene 120-12-7 0.26 2.44 50.4 Fluoranthene 206-44-0 0.34 2.44 382 Pyrene 129-00-0 0.37 2.44 428 Benzo(a)anthracene 56-55-3 0.37 2.44 63.6 Chrysene 218-01-9 0.30 2.44 76.1 Benzo[b]fluoranthene 205-99-2 0.39 2.44 102 Benzo(k)fluoranthene 207-08-9 0.34 2.44 25.0 Benzo(a)pyrene 50-32-8 0.38 2.44 46.1 Indeno(1,2,3-c,d)pyrene 193-39-5 0.45 2.44 33.2 Dibenzo(a,h)anthracene 53-70-3 0.44 2.44 0.44 U Benzo(g,h,i)perylene 191-24-2 0.40 2.44 70.0 Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 102 18-137 HM140331-11:50-N1415-S Page 7 of 74

Client Sample ID: SE-5 Sample : 03/06/14 Sample Time: 13:40 Type: Grab Lab Sample ID: N141505 Received: 03/07/14 Dilution Factor: 10 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 1.13 4.93 227 2-Methylnaphthalene 91-57-6 0.84 4.93 261 1-Methylnaphthalene 90-12-0 0.94 4.93 142 Acenaphthylene 208-96-8 0.60 4.93 107 Acenaphthene 83-32-9 0.74 4.93 71.8 Dibenzofuran 132-64-9 0.82 4.93 45.8 Fluorene 86-73-7 0.52 4.93 49.2 Pentachlorophenol 87-86-5 1.94 9.86 1.94 U Phenanthrene 85-01-8 0.52 4.93 315 Anthracene 120-12-7 0.53 4.93 61.9 Fluoranthene 206-44-0 0.68 4.93 295 Pyrene 129-00-0 0.75 4.93 427 Benzo(a)anthracene 56-55-3 0.74 4.93 50.6 Chrysene 218-01-9 0.60 4.93 101 Benzo[b]fluoranthene 205-99-2 0.79 4.93 73.9 Benzo(k)fluoranthene 207-08-9 0.69 4.93 40.6 Benzo(a)pyrene 50-32-8 0.76 4.93 66.7 Indeno(1,2,3-c,d)pyrene 193-39-5 0.90 4.93 27.8 Dibenzo(a,h)anthracene 53-70-3 0.88 4.93 13.3 Benzo(g,h,i)perylene 191-24-2 0.81 4.93 71.0 Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 153 18-137 1 * HM140331-11:50-N1415-S Page 8 of 74

Client Sample ID: SE-6 Sample : 03/06/14 Sample Time: 16:45 Type: Grab Lab Sample ID: N141506 Received: 03/07/14 Dilution Factor: 10 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 1.49 6.50 9.08 2-Methylnaphthalene 91-57-6 1.10 6.50 5.45 J 1-Methylnaphthalene 90-12-0 1.24 6.50 2.92 J Acenaphthylene 208-96-8 0.80 6.50 6.68 Acenaphthene 83-32-9 0.98 6.50 0.98 U Dibenzofuran 132-64-9 1.08 6.50 1.54 J Fluorene 86-73-7 0.69 6.50 0.89 J Pentachlorophenol 87-86-5 2.56 13.0 2.56 U Phenanthrene 85-01-8 0.68 6.50 14.4 Anthracene 120-12-7 0.70 6.50 4.76 J Fluoranthene 206-44-0 0.90 6.50 22.2 Pyrene 129-00-0 0.98 6.50 25.9 Benzo(a)anthracene 56-55-3 0.97 6.50 9.47 Chrysene 218-01-9 0.79 6.50 10.4 Benzo[b]fluoranthene 205-99-2 1.03 6.50 14.8 Benzo(k)fluoranthene 207-08-9 0.90 6.50 6.45 J Benzo(a)pyrene 50-32-8 1.01 6.50 12.8 Indeno(1,2,3-c,d)pyrene 193-39-5 1.19 6.50 13.5 Dibenzo(a,h)anthracene 53-70-3 1.16 6.50 1.16 U Benzo(g,h,i)perylene 191-24-2 1.07 6.50 29.3 Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 112 18-137 HM140331-11:50-N1415-S Page 9 of 74

Client Sample ID: SE-7 Sample : 03/06/14 Sample Time: 16:30 Type: Grab Lab Sample ID: N141507 Received: 03/07/14 Dilution Factor: 10 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 1.35 5.88 18.7 2-Methylnaphthalene 91-57-6 1.0 5.88 10.2 1-Methylnaphthalene 90-12-0 1.12 5.88 4.92 J Acenaphthylene 208-96-8 0.72 5.88 17.1 Acenaphthene 83-32-9 0.89 5.88 0.89 U Dibenzofuran 132-64-9 0.97 5.88 2.27 J Fluorene 86-73-7 0.62 5.88 1.60 J Pentachlorophenol 87-86-5 2.32 11.8 2.32 U Phenanthrene 85-01-8 0.62 5.88 28.2 Anthracene 120-12-7 0.64 5.88 7.14 Fluoranthene 206-44-0 0.82 5.88 47.4 Pyrene 129-00-0 0.89 5.88 48.7 Benzo(a)anthracene 56-55-3 0.88 5.88 22.6 Chrysene 218-01-9 0.71 5.88 21.2 Benzo[b]fluoranthene 205-99-2 0.94 5.88 48.8 Benzo(k)fluoranthene 207-08-9 0.82 5.88 12.8 Benzo(a)pyrene 50-32-8 0.91 5.88 30.2 Indeno(1,2,3-c,d)pyrene 193-39-5 1.07 5.88 23.8 Dibenzo(a,h)anthracene 53-70-3 1.05 5.88 1.05 U Benzo(g,h,i)perylene 191-24-2 0.97 5.88 77.1 Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 74 18-137 HM140331-11:50-N1415-S Page 10 of 74

Client Sample ID: SE-8 Sample : 03/06/14 Sample Time: 16:10 Type: Grab Lab Sample ID: N141508 Received: 03/07/14 Dilution Factor: 5 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 0.62 2.71 3.09 2-Methylnaphthalene 91-57-6 0.46 2.71 2.28 J 1-Methylnaphthalene 90-12-0 0.52 2.71 1.37 J Acenaphthylene 208-96-8 0.33 2.71 2.42 J Acenaphthene 83-32-9 0.41 2.71 0.41 U Dibenzofuran 132-64-9 0.45 2.71 0.76 J Fluorene 86-73-7 0.29 2.71 0.60 J Pentachlorophenol 87-86-5 1.07 5.42 1.07 U Phenanthrene 85-01-8 0.28 2.71 5.31 Anthracene 120-12-7 0.29 2.71 3.70 Fluoranthene 206-44-0 0.38 2.71 7.44 Pyrene 129-00-0 0.41 2.71 6.07 Benzo(a)anthracene 56-55-3 0.41 2.71 2.09 J Chrysene 218-01-9 0.33 2.71 2.57 J Benzo[b]fluoranthene 205-99-2 0.43 2.71 4.14 Benzo(k)fluoranthene 207-08-9 0.38 2.71 1.29 J Benzo(a)pyrene 50-32-8 0.42 2.71 2.06 J Indeno(1,2,3-c,d)pyrene 193-39-5 0.49 2.71 0.49 U Dibenzo(a,h)anthracene 53-70-3 0.49 2.71 0.49 U Benzo(g,h,i)perylene 191-24-2 0.45 2.71 2.99 Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 105 18-137 HM140331-11:50-N1415-S Page 11 of 74

Client Sample ID: SE-9 Sample : 03/06/14 Sample Time: 11:55 Type: Grab Lab Sample ID: N141509 Received: 03/07/14 Dilution Factor: 5 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 0.68 2.97 4.84 2-Methylnaphthalene 91-57-6 0.51 2.97 2.74 J 1-Methylnaphthalene 90-12-0 0.57 2.97 1.43 J Acenaphthylene 208-96-8 0.36 2.97 6.48 Acenaphthene 83-32-9 0.45 2.97 0.45 U Dibenzofuran 132-64-9 0.49 2.97 0.95 J Fluorene 86-73-7 0.31 2.97 0.95 J Pentachlorophenol 87-86-5 1.17 5.94 1.17 U Phenanthrene 85-01-8 0.31 2.97 15.6 Anthracene 120-12-7 0.32 2.97 4.21 Fluoranthene 206-44-0 0.41 2.97 30.9 Pyrene 129-00-0 0.45 2.97 39.6 Benzo(a)anthracene 56-55-3 0.45 2.97 13.1 Chrysene 218-01-9 0.36 2.97 17.6 Benzo[b]fluoranthene 205-99-2 0.47 2.97 23.7 Benzo(k)fluoranthene 207-08-9 0.41 2.97 7.05 Benzo(a)pyrene 50-32-8 0.46 2.97 14.6 Indeno(1,2,3-c,d)pyrene 193-39-5 0.54 2.97 8.99 Dibenzo(a,h)anthracene 53-70-3 0.53 2.97 0.53 U Benzo(g,h,i)perylene 191-24-2 0.49 2.97 12.4 Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 108 18-137 HM140331-11:50-N1415-S Page 12 of 74

Client Sample ID: SE-10 Sample : 03/06/14 Sample Time: 11:36 Type: Grab Lab Sample ID: N141510 Received: 03/07/14 Dilution Factor: 5 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 0.78 3.38 2.70 J 2-Methylnaphthalene 91-57-6 0.57 3.38 1.37 J 1-Methylnaphthalene 90-12-0 0.65 3.38 0.65 U Acenaphthylene 208-96-8 0.41 3.38 1.41 J Acenaphthene 83-32-9 0.51 3.38 0.51 U Dibenzofuran 132-64-9 0.56 3.38 0.84 J Fluorene 86-73-7 0.36 3.38 0.40 J Pentachlorophenol 87-86-5 1.33 6.75 1.33 U Phenanthrene 85-01-8 0.35 3.38 5.54 Anthracene 120-12-7 0.37 3.38 0.89 J Fluoranthene 206-44-0 0.47 3.38 7.82 Pyrene 129-00-0 0.51 3.38 7.58 Benzo(a)anthracene 56-55-3 0.51 3.38 1.63 J Chrysene 218-01-9 0.41 3.38 2.15 J Benzo[b]fluoranthene 205-99-2 0.54 3.38 3.19 J Benzo(k)fluoranthene 207-08-9 0.47 3.38 0.47 U Benzo(a)pyrene 50-32-8 0.52 3.38 0.52 U Indeno(1,2,3-c,d)pyrene 193-39-5 0.62 3.38 1.53 J Dibenzo(a,h)anthracene 53-70-3 0.60 3.38 0.60 U Benzo(g,h,i)perylene 191-24-2 0.56 3.38 0.56 U Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 96 18-137 HM140331-11:50-N1415-S Page 13 of 74

Client Sample ID: SE-11 Sample : 03/06/14 Sample Time: 11:20 Type: Grab Lab Sample ID: N141511 Received: 03/07/14 Dilution Factor: 5 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 0.69 3.00 2.85 J 2-Methylnaphthalene 91-57-6 0.51 3.00 1.34 J 1-Methylnaphthalene 90-12-0 0.57 3.00 0.89 J Acenaphthylene 208-96-8 0.37 3.00 0.86 J Acenaphthene 83-32-9 0.45 3.00 0.45 U Dibenzofuran 132-64-9 0.50 3.00 1.13 J Fluorene 86-73-7 0.32 3.00 0.32 U Pentachlorophenol 87-86-5 1.18 6.01 1.18 U Phenanthrene 85-01-8 0.32 3.00 3.20 Anthracene 120-12-7 0.33 3.00 0.54 J Fluoranthene 206-44-0 0.42 3.00 2.82 J Pyrene 129-00-0 0.45 3.00 3.38 Benzo(a)anthracene 56-55-3 0.45 3.00 0.45 U Chrysene 218-01-9 0.36 3.00 1.0 J Benzo[b]fluoranthene 205-99-2 0.48 3.00 0.48 U Benzo(k)fluoranthene 207-08-9 0.42 3.00 0.42 U Benzo(a)pyrene 50-32-8 0.47 3.00 0.47 U Indeno(1,2,3-c,d)pyrene 193-39-5 0.55 3.00 0.55 U Dibenzo(a,h)anthracene 53-70-3 0.54 3.00 0.54 U Benzo(g,h,i)perylene 191-24-2 0.49 3.00 0.49 U Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 65 18-137 HM140331-11:50-N1415-S Page 14 of 74

Client Sample ID: SE-12 Sample : 03/06/14 Sample Time: 10:48 Type: Grab Lab Sample ID: N141512 Received: 03/07/14 Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 0.13 0.57 0.34 J 2-Methylnaphthalene 91-57-6 0.096 0.57 0.20 J 1-Methylnaphthalene 90-12-0 0.11 0.57 0.11 U Acenaphthylene 208-96-8 0.070 0.57 0.12 J Acenaphthene 83-32-9 0.085 0.57 0.085 U Dibenzofuran 132-64-9 0.094 0.57 0.094 U Fluorene 86-73-7 0.060 0.57 0.061 J Pentachlorophenol 87-86-5 0.22 1.13 0.61 J Phenanthrene 85-01-8 0.060 0.57 0.28 J Anthracene 120-12-7 0.061 0.57 0.10 J Fluoranthene 206-44-0 0.079 0.57 0.46 J Pyrene 129-00-0 0.086 0.57 0.69 Benzo(a)anthracene 56-55-3 0.085 0.57 0.085 U Chrysene 218-01-9 0.069 0.57 0.069 U Benzo[b]fluoranthene 205-99-2 0.090 0.57 2.40 Benzo(k)fluoranthene 207-08-9 0.079 0.57 0.079 U Benzo(a)pyrene 50-32-8 0.088 0.57 1.33 Indeno(1,2,3-c,d)pyrene 193-39-5 0.10 0.57 0.10 U Dibenzo(a,h)anthracene 53-70-3 0.10 0.57 0.10 U Benzo(g,h,i)perylene 191-24-2 0.093 0.57 1.82 Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 102 18-137 HM140331-11:50-N1415-S Page 15 of 74

Client Sample ID: SE-13 Sample : 03/06/14 Sample Time: 10:20 Type: Grab Lab Sample ID: N141513 Received: 03/07/14 Dilution Factor: 10 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 1.34 5.81 15.5 2-Methylnaphthalene 91-57-6 0.99 5.81 7.98 1-Methylnaphthalene 90-12-0 1.11 5.81 3.60 J Acenaphthylene 208-96-8 0.71 5.81 7.48 Acenaphthene 83-32-9 0.88 5.81 0.88 U Dibenzofuran 132-64-9 0.96 5.81 1.48 J Fluorene 86-73-7 0.62 5.81 1.24 J Pentachlorophenol 87-86-5 2.29 11.6 2.29 U Phenanthrene 85-01-8 0.61 5.81 19.6 Anthracene 120-12-7 0.63 5.81 5.02 J Fluoranthene 206-44-0 0.81 5.81 29.6 Pyrene 129-00-0 0.88 5.81 41.3 Benzo(a)anthracene 56-55-3 0.87 5.81 15.3 Chrysene 218-01-9 0.71 5.81 15.4 Benzo[b]fluoranthene 205-99-2 0.93 5.81 45.0 Benzo(k)fluoranthene 207-08-9 0.81 5.81 0.81 U Benzo(a)pyrene 50-32-8 0.90 5.81 39.6 Indeno(1,2,3-c,d)pyrene 193-39-5 1.06 5.81 21.1 Dibenzo(a,h)anthracene 53-70-3 1.04 5.81 1.04 U Benzo(g,h,i)perylene 191-24-2 0.96 5.81 58.6 Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 64 18-137 HM140331-11:50-N1415-S Page 16 of 74

Client Sample ID: SE-14 Sample : 03/06/14 Sample Time: 09:55 Type: Grab Lab Sample ID: N141514 Received: 03/07/14 Dilution Factor: 5 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 0.68 2.96 2.89 J 2-Methylnaphthalene 91-57-6 0.50 2.96 1.62 J 1-Methylnaphthalene 90-12-0 0.57 2.96 1.12 J Acenaphthylene 208-96-8 0.36 2.96 1.94 J Acenaphthene 83-32-9 0.45 2.96 0.45 U Dibenzofuran 132-64-9 0.49 2.96 0.76 J Fluorene 86-73-7 0.31 2.96 0.50 J Pentachlorophenol 87-86-5 1.17 5.91 4.61 J Phenanthrene 85-01-8 0.31 2.96 4.74 Anthracene 120-12-7 0.32 2.96 1.07 J Fluoranthene 206-44-0 0.41 2.96 5.35 Pyrene 129-00-0 0.45 2.96 4.92 Benzo(a)anthracene 56-55-3 0.44 2.96 1.56 J Chrysene 218-01-9 0.36 2.96 1.98 J Benzo[b]fluoranthene 205-99-2 0.47 2.96 3.85 Benzo(k)fluoranthene 207-08-9 0.41 2.96 1.08 J Benzo(a)pyrene 50-32-8 0.46 2.96 1.67 J Indeno(1,2,3-c,d)pyrene 193-39-5 0.54 2.96 0.54 U Dibenzo(a,h)anthracene 53-70-3 0.53 2.96 0.53 U Benzo(g,h,i)perylene 191-24-2 0.49 2.96 2.92 J Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 118 18-137 HM140331-11:50-N1415-S Page 17 of 74

Client Sample ID: SE-15 Sample : 03/06/14 Sample Time: 09:00 Type: Grab Lab Sample ID: N141515 Received: 03/07/14 Dilution Factor: 10 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 2.21 9.63 7.37 J 2-Methylnaphthalene 91-57-6 1.64 9.63 4.50 J 1-Methylnaphthalene 90-12-0 1.84 9.63 3.12 J Acenaphthylene 208-96-8 1.18 9.63 5.18 J Acenaphthene 83-32-9 1.45 9.63 1.45 U Dibenzofuran 132-64-9 1.60 9.63 2.50 J Fluorene 86-73-7 1.02 9.63 1.91 J Pentachlorophenol 87-86-5 3.80 19.3 3.80 U Phenanthrene 85-01-8 1.01 9.63 22.9 Anthracene 120-12-7 1.04 9.63 5.85 J Fluoranthene 206-44-0 1.34 9.63 29.0 Pyrene 129-00-0 1.46 9.63 30.6 Benzo(a)anthracene 56-55-3 1.44 9.63 12.5 Chrysene 218-01-9 1.17 9.63 11.8 Benzo[b]fluoranthene 205-99-2 1.53 9.63 21.6 Benzo(k)fluoranthene 207-08-9 1.34 9.63 10.2 Benzo(a)pyrene 50-32-8 1.49 9.63 17.4 Indeno(1,2,3-c,d)pyrene 193-39-5 1.76 9.63 8.87 J Dibenzo(a,h)anthracene 53-70-3 1.73 9.63 1.73 U Benzo(g,h,i)perylene 191-24-2 1.58 9.63 19.3 Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 93 18-137 HM140331-11:50-N1415-S Page 18 of 74

Client Sample ID: SE-16 Sample : 03/06/14 Sample Time: 08:28 Type: Grab Lab Sample ID: N141516 Received: 03/07/14 Dilution Factor: 5 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 0.66 2.86 4.41 2-Methylnaphthalene 91-57-6 0.49 2.86 3.23 1-Methylnaphthalene 90-12-0 0.55 2.86 1.79 J Acenaphthylene 208-96-8 0.35 2.86 4.59 Acenaphthene 83-32-9 0.43 2.86 0.70 J Dibenzofuran 132-64-9 0.47 2.86 1.79 J Fluorene 86-73-7 0.30 2.86 0.69 J Pentachlorophenol 87-86-5 1.13 5.72 1.13 U Phenanthrene 85-01-8 0.30 2.86 11.5 Anthracene 120-12-7 0.31 2.86 6.76 Fluoranthene 206-44-0 0.40 2.86 16.6 Pyrene 129-00-0 0.43 2.86 15.5 Benzo(a)anthracene 56-55-3 0.43 2.86 5.74 Chrysene 218-01-9 0.35 2.86 8.49 Benzo[b]fluoranthene 205-99-2 0.46 2.86 21.4 Benzo(k)fluoranthene 207-08-9 0.40 2.86 5.27 Benzo(a)pyrene 50-32-8 0.44 2.86 8.10 Indeno(1,2,3-c,d)pyrene 193-39-5 0.52 2.86 16.2 Dibenzo(a,h)anthracene 53-70-3 0.51 2.86 0.51 U Benzo(g,h,i)perylene 191-24-2 0.47 2.86 28.5 Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 106 18-137 HM140331-11:50-N1415-S Page 19 of 74

Client Sample ID: SE-17 Sample : 03/06/14 Sample Time: 08:00 Type: Grab Lab Sample ID: N141517 Received: 03/07/14 Dilution Factor: 5 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 0.63 2.74 25.9 2-Methylnaphthalene 91-57-6 0.47 2.74 12.6 1-Methylnaphthalene 90-12-0 0.52 2.74 5.40 Acenaphthylene 208-96-8 0.34 2.74 14.5 Acenaphthene 83-32-9 0.41 2.74 3.16 Dibenzofuran 132-64-9 0.45 2.74 15.0 Fluorene 86-73-7 0.29 2.74 2.92 Pentachlorophenol 87-86-5 1.08 5.48 1.08 U Phenanthrene 85-01-8 0.29 2.74 121 Anthracene 120-12-7 0.30 2.74 47.1 Fluoranthene 206-44-0 0.38 2.74 154 Pyrene 129-00-0 0.41 2.74 105 Benzo(a)anthracene 56-55-3 0.41 2.74 38.4 Chrysene 218-01-9 0.33 2.74 38.1 Benzo[b]fluoranthene 205-99-2 0.44 2.74 53.8 Benzo(k)fluoranthene 207-08-9 0.38 2.74 14.7 Benzo(a)pyrene 50-32-8 0.42 2.74 16.3 Indeno(1,2,3-c,d)pyrene 193-39-5 0.50 2.74 11.2 Dibenzo(a,h)anthracene 53-70-3 0.49 2.74 4.31 Benzo(g,h,i)perylene 191-24-2 0.45 2.74 17.3 Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 111 18-137 HM140331-11:50-N1415-S Page 20 of 74

Client Sample ID: SB1-0312 Sample : N/A Sample Time: N/A Type: QC Lab Sample ID: SB1-0312 Received: N/A Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 0.11 0.50 0.11 U 2-Methylnaphthalene 91-57-6 0.085 0.50 0.085 U 1-Methylnaphthalene 90-12-0 0.096 0.50 0.096 U Acenaphthylene 208-96-8 0.061 0.50 0.061 U Acenaphthene 83-32-9 0.075 0.50 0.075 U Dibenzofuran 132-64-9 0.083 0.50 0.083 U Fluorene 86-73-7 0.053 0.50 0.053 U Pentachlorophenol 87-86-5 0.20 1.00 0.20 U Phenanthrene 85-01-8 0.053 0.50 0.053 U Anthracene 120-12-7 0.054 0.50 0.054 U Fluoranthene 206-44-0 0.069 0.50 0.069 U Pyrene 129-00-0 0.076 0.50 0.076 U Benzo(a)anthracene 56-55-3 0.075 0.50 0.075 U Chrysene 218-01-9 0.061 0.50 0.061 U Benzo[b]fluoranthene 205-99-2 0.080 0.50 0.080 U Benzo(k)fluoranthene 207-08-9 0.070 0.50 0.070 U Benzo(a)pyrene 50-32-8 0.078 0.50 0.078 U Indeno(1,2,3-c,d)pyrene 193-39-5 0.091 0.50 0.091 U Dibenzo(a,h)anthracene 53-70-3 0.090 0.50 0.090 U Benzo(g,h,i)perylene 191-24-2 0.082 0.50 0.082 U Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 90 18-137 HM140331-11:50-N1415-S Page 21 of 74

Client Sample ID: SB1-0318 Sample : N/A Sample Time: N/A Type: QC Lab Sample ID: SB1-0318 Received: N/A Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC/MS Semi-Volatiles Naphthalene 91-20-3 0.11 0.50 0.11 U 2-Methylnaphthalene 91-57-6 0.085 0.50 0.085 U 1-Methylnaphthalene 90-12-0 0.096 0.50 0.096 U Acenaphthylene 208-96-8 0.061 0.50 0.061 U Acenaphthene 83-32-9 0.075 0.50 0.075 U Dibenzofuran 132-64-9 0.083 0.50 0.083 U Fluorene 86-73-7 0.053 0.50 0.053 U Pentachlorophenol 87-86-5 0.20 1.00 0.20 U Phenanthrene 85-01-8 0.053 0.50 0.053 U Anthracene 120-12-7 0.054 0.50 0.066 J Fluoranthene 206-44-0 0.069 0.50 0.069 U Pyrene 129-00-0 0.076 0.50 0.076 U Benzo(a)anthracene 56-55-3 0.075 0.50 0.075 U Chrysene 218-01-9 0.061 0.50 0.061 U Benzo[b]fluoranthene 205-99-2 0.080 0.50 0.080 U Benzo(k)fluoranthene 207-08-9 0.070 0.50 0.095 J Benzo(a)pyrene 50-32-8 0.078 0.50 0.078 U Indeno(1,2,3-c,d)pyrene 193-39-5 0.091 0.50 0.091 U Dibenzo(a,h)anthracene 53-70-3 0.090 0.50 0.090 U Benzo(g,h,i)perylene 191-24-2 0.082 0.50 0.082 U Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 88 18-137 HM140331-11:50-N1415-S Page 22 of 74

LCS ID: BS1S0312 Report Revision No.: 0 Type: QC Dilution Factor: 1 Spike Sample Analyte CAS# Amount %Recovery GC/MS Semi-Volatiles Naphthalene 91-20-3 25.0 21.5 ug/kg 86 SW8270C-SI 2-Methylnaphthalene 91-57-6 25.0 19.2 ug/kg 77 SW8270C-SI 1-Methylnaphthalene 90-12-0 25.0 18.4 ug/kg 74 SW8270C-SI Acenaphthylene 208-96-8 25.0 22.1 ug/kg 88 SW8270C-SI Acenaphthene 83-32-9 25.0 22.5 ug/kg 90 SW8270C-SI Dibenzofuran 132-64-9 25.0 18.8 ug/kg 75 SW8270C-SI Fluorene 86-73-7 25.0 20.4 ug/kg 82 SW8270C-SI Pentachlorophenol 87-86-5 25.0 19.9 ug/kg 80 SW8270C-SI Phenanthrene 85-01-8 25.0 20.8 ug/kg 83 SW8270C-SI Anthracene 120-12-7 25.0 22.2 ug/kg 89 SW8270C-SI Fluoranthene 206-44-0 25.0 24.8 ug/kg 99 SW8270C-SI Pyrene 129-00-0 25.0 23.5 ug/kg 94 SW8270C-SI Benzo(a)anthracene 56-55-3 25.0 23.6 ug/kg 94 SW8270C-SI Chrysene 218-01-9 25.0 22.7 ug/kg 91 SW8270C-SI Benzo(b)fluoroanthene 205-99-2 25.0 21.8 ug/kg 87 SW8270C-SI Benzo(k)fluoranthene 207-08-9 25.0 22.7 ug/kg 91 SW8270C-SI Benzo(a)pyrene 50-32-8 25.0 23.4 ug/kg 94 SW8270C-SI Indeno(1,2,3-c,d)pyrene 193-39-5 25.0 21.5 ug/kg 86 SW8270C-SI Dibenzo(a,h)anthracene 53-70-3 25.0 21.8 ug/kg 87 SW8270C-SI Benzo(g,h,i)perylene 191-24-2 25.0 21.7 ug/kg 87 SW8270C-SI Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 97 18-137 HM140331-11:50-N1415-S Page 23 of 74

LCS ID: BS1S0318 Report Revision No.: 0 Type: QC Dilution Factor: 1 Spike Sample Analyte CAS# Amount %Recovery GC/MS Semi-Volatiles Naphthalene 91-20-3 25.0 20.4 ug/kg 82 SW8270C-SI 2-Methylnaphthalene 91-57-6 25.0 20.0 ug/kg 80 SW8270C-SI 1-Methylnaphthalene 90-12-0 25.0 19.0 ug/kg 76 SW8270C-SI Acenaphthylene 208-96-8 25.0 23.2 ug/kg 93 SW8270C-SI Acenaphthene 83-32-9 25.0 23.8 ug/kg 95 SW8270C-SI Dibenzofuran 132-64-9 25.0 20.0 ug/kg 80 SW8270C-SI Fluorene 86-73-7 25.0 20.7 ug/kg 83 SW8270C-SI Pentachlorophenol 87-86-5 25.0 22.7 ug/kg 91 SW8270C-SI Phenanthrene 85-01-8 25.0 22.6 ug/kg 90 SW8270C-SI Anthracene 120-12-7 25.0 23.2 ug/kg 93 SW8270C-SI Fluoranthene 206-44-0 25.0 24.9 ug/kg 100 SW8270C-SI Pyrene 129-00-0 25.0 27.0 ug/kg 108 SW8270C-SI Benzo(a)anthracene 56-55-3 25.0 25.3 ug/kg 101 SW8270C-SI Chrysene 218-01-9 25.0 24.8 ug/kg 99 SW8270C-SI Benzo(b)fluoroanthene 205-99-2 25.0 22.7 ug/kg 91 SW8270C-SI Benzo(k)fluoranthene 207-08-9 25.0 24.0 ug/kg 96 SW8270C-SI Benzo(a)pyrene 50-32-8 25.0 23.5 ug/kg 94 SW8270C-SI Indeno(1,2,3-c,d)pyrene 193-39-5 25.0 25.0 ug/kg 100 SW8270C-SI Dibenzo(a,h)anthracene 53-70-3 25.0 25.6 ug/kg 102 SW8270C-SI Benzo(g,h,i)perylene 191-24-2 25.0 24.8 ug/kg 99 SW8270C-SI Surrogate Terphenyl-d14 % Recovery Control Limits Qualifier 109 18-137 HM140331-11:50-N1415-S Page 24 of 74

CASE NARRATIVE GC SEMI-VOLATILES ANALYSIS Lab Name: ASL SDG#: N1415 Project: Klamath--Lake Ewauna Project #: 462902.05.03 With the exceptions noted as flags, footnotes, or detailed in the section below; standard operating procedures were followed in the analysis of the samples and no problems were encountered or anomalies observed. All laboratory quality control samples were within established control limits, with any exceptions noted below, or in the associated QC summary forms. Each sample was analyzed to achieve the lowest possible reporting limit within the constraints of the method. For diluted samples, the reporting limits are adjusted for the dilution required. Calculations are performed before rounding to minimize errors in calculated values. All holding times were met and proper preservation noted for the methods performed on these samples, unless otherwise detailed in the section below, or in the sample receipt documentation. (s): NWTPH-DX: SW3550 Surrogate Standard(s): Surrogate o-terphenyl in SE-5 was diluted out. Surrogate Octacosane in SE-5 was diluted out. Surrogate o-terphenyl in SE-7 was diluted out. Surrogate Octacosane in SE-7 was diluted out. Surrogate o-terphenyl in SE-13 was diluted out. Surrogate Octacosane in SE-13 was diluted out. Analytical Exception(s): Multi-incremental sampling was performed on N141504 and N141505. Page 25 of 74 TH140402-10:04-N1415-D

Client Sample ID: SE-1 Sample : 03/06/14 Sample Time: 14:57 Type: Grab Lab Sample ID: N141501 Received: 03/07/14 Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC Semi-Volatiles TPH-Oil TPH-Oil 1.34 119 64.1 J mg/kg NWTPH-DX TPH-Diesel TPH-Diesel 0.49 29.8 10.0 J mg/kg NWTPH-DX 03/17/14 03/17/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 74 50-150 Octacosane 74 50-150 CH140319-13:06-N1415-D Page 26 of 74

Client Sample ID: SE-2 Sample : 03/06/14 Sample Time: 15:18 Type: Grab Lab Sample ID: N141502 Received: 03/07/14 Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC Semi-Volatiles TPH-Oil TPH-Oil 1.32 117 104 J mg/kg NWTPH-DX TPH-Diesel TPH-Diesel 0.49 29.3 13.5 J mg/kg NWTPH-DX 03/17/14 03/17/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 64 50-150 Octacosane 65 50-150 CH140319-13:06-N1415-D Page 27 of 74

Client Sample ID: SE-3 Sample : 03/06/14 Sample Time: 15:33 Type: Grab Lab Sample ID: N141503 Received: 03/07/14 Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC Semi-Volatiles TPH-Oil TPH-Oil 2.65 235 93.2 J mg/kg NWTPH-DX TPH-Diesel TPH-Diesel 0.98 58.8 13.6 J mg/kg NWTPH-DX 03/17/14 03/17/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 60 50-150 Octacosane 61 50-150 CH140319-13:06-N1415-D Page 28 of 74

Client Sample ID: SE-4 Sample : 03/06/14 Sample Time: 13:22 Type: Grab Lab Sample ID: N141504 Received: 03/07/14 Dilution Factor: 10 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC Semi-Volatiles TPH-Oil TPH-Oil 17.8 1580 2300 mg/kg NWTPH-DX TPH-Diesel TPH-Diesel 6.54 394 331 J mg/kg NWTPH-DX 03/18/14 03/18/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 79 50-150 Octacosane 90 50-150 CH140319-13:06-N1415-D Page 29 of 74

Client Sample ID: SE-5 Sample : 03/06/14 Sample Time: 13:40 Type: Grab Lab Sample ID: N141505 Received: 03/07/14 Dilution Factor: 50 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC Semi-Volatiles TPH-Oil TPH-Oil 70.0 6210 10000 mg/kg NWTPH-DX TPH-Diesel TPH-Diesel 25.8 1550 2250 mg/kg NWTPH-DX 03/18/14 03/18/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 0 50-150 1 * Octacosane 0 50-150 2 * CH140319-13:06-N1415-D Page 30 of 74

Client Sample ID: SE-6 Sample : 03/06/14 Sample Time: 16:45 Type: Grab Lab Sample ID: N141506 Received: 03/07/14 Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC Semi-Volatiles TPH-Oil TPH-Oil 1.44 128 87.0 J mg/kg NWTPH-DX TPH-Diesel TPH-Diesel 0.53 31.9 6.89 J mg/kg NWTPH-DX 03/18/14 03/18/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 85 50-150 Octacosane 88 50-150 CH140319-13:06-N1415-D Page 31 of 74

Client Sample ID: SE-7 Sample : 03/06/14 Sample Time: 16:30 Type: Grab Lab Sample ID: N141507 Received: 03/07/14 Dilution Factor: 20 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC Semi-Volatiles TPH-Oil TPH-Oil 25.7 2280 1750 J mg/kg NWTPH-DX TPH-Diesel TPH-Diesel 9.47 570 116 J mg/kg NWTPH-DX 03/18/14 03/18/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 0 50-150 1 * Octacosane 0 50-150 2 * CH140319-13:06-N1415-D Page 32 of 74

Client Sample ID: SE-8 Sample : 03/06/14 Sample Time: 16:10 Type: Grab Lab Sample ID: N141508 Received: 03/07/14 Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC Semi-Volatiles TPH-Oil TPH-Oil 1.20 106 79.8 J mg/kg NWTPH-DX TPH-Diesel TPH-Diesel 0.44 26.6 18.5 J mg/kg NWTPH-DX 03/18/14 03/18/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 82 50-150 Octacosane 87 50-150 CH140319-13:06-N1415-D Page 33 of 74

Client Sample ID: SE-9 Sample : 03/06/14 Sample Time: 11:55 Type: Grab Lab Sample ID: N141509 Received: 03/07/14 Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC Semi-Volatiles TPH-Oil TPH-Oil 1.32 117 330 mg/kg NWTPH-DX TPH-Diesel TPH-Diesel 0.49 29.3 41.2 mg/kg NWTPH-DX 03/18/14 03/18/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 78 50-150 Octacosane 89 50-150 CH140319-13:06-N1415-D Page 34 of 74

Client Sample ID: SE-10 Sample : 03/06/14 Sample Time: 11:36 Type: Grab Lab Sample ID: N141510 Received: 03/07/14 Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC Semi-Volatiles TPH-Oil TPH-Oil 1.50 133 276 mg/kg NWTPH-DX TPH-Diesel TPH-Diesel 0.55 33.3 46.8 mg/kg NWTPH-DX 03/18/14 03/18/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 73 50-150 Octacosane 80 50-150 CH140319-13:06-N1415-D Page 35 of 74

Client Sample ID: SE-11 Sample : 03/06/14 Sample Time: 11:20 Type: Grab Lab Sample ID: N141511 Received: 03/07/14 Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC Semi-Volatiles TPH-Oil TPH-Oil 1.30 115 534 mg/kg NWTPH-DX TPH-Diesel TPH-Diesel 0.48 28.8 83.6 mg/kg NWTPH-DX 03/18/14 03/18/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 71 50-150 Octacosane 73 50-150 CH140319-13:06-N1415-D Page 36 of 74

Client Sample ID: SE-12 Sample : 03/06/14 Sample Time: 10:48 Type: Grab Lab Sample ID: N141512 Received: 03/07/14 Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC Semi-Volatiles TPH-Oil TPH-Oil 1.26 112 387 mg/kg NWTPH-DX TPH-Diesel TPH-Diesel 0.46 27.9 21.7 J mg/kg NWTPH-DX 03/18/14 03/18/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 88 50-150 Octacosane 93 50-150 CH140319-13:06-N1415-D Page 37 of 74

Client Sample ID: SE-13 Sample : 03/06/14 Sample Time: 10:20 Type: Grab Lab Sample ID: N141513 Received: 03/07/14 Dilution Factor: 20 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC Semi-Volatiles TPH-Oil TPH-Oil 26.2 2330 1580 J mg/kg NWTPH-DX TPH-Diesel TPH-Diesel 9.66 581 113 J mg/kg NWTPH-DX 03/18/14 03/18/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 0 50-150 1 * Octacosane 0 50-150 2 * CH140319-13:06-N1415-D Page 38 of 74

Client Sample ID: SE-14 Sample : 03/06/14 Sample Time: 09:55 Type: Grab Lab Sample ID: N141514 Received: 03/07/14 Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC Semi-Volatiles TPH-Oil TPH-Oil 1.32 117 136 mg/kg NWTPH-DX TPH-Diesel TPH-Diesel 0.49 29.3 15.0 J mg/kg NWTPH-DX 03/18/14 03/18/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 82 50-150 Octacosane 87 50-150 CH140319-13:06-N1415-D Page 39 of 74

Client Sample ID: SE-15 Sample : 03/06/14 Sample Time: 09:00 Type: Grab Lab Sample ID: N141515 Received: 03/07/14 Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC Semi-Volatiles TPH-Oil TPH-Oil 2.10 186 260 mg/kg NWTPH-DX TPH-Diesel TPH-Diesel 0.77 46.5 37.2 J mg/kg NWTPH-DX 03/18/14 03/18/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 73 50-150 Octacosane 78 50-150 CH140319-13:06-N1415-D Page 40 of 74

Client Sample ID: SE-16 Sample : 03/06/14 Sample Time: 08:28 Type: Grab Lab Sample ID: N141516 Received: 03/07/14 Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC Semi-Volatiles TPH-Oil TPH-Oil 1.27 113 48.6 J mg/kg NWTPH-DX TPH-Diesel TPH-Diesel 0.47 28.3 7.86 J mg/kg NWTPH-DX 03/18/14 03/18/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 83 50-150 Octacosane 90 50-150 CH140319-13:06-N1415-D Page 41 of 74

Client Sample ID: SE-17 Sample : 03/06/14 Sample Time: 08:00 Type: Grab Lab Sample ID: N141517 Received: 03/07/14 Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC Semi-Volatiles TPH-Oil TPH-Oil 1.19 105 64.6 J mg/kg NWTPH-DX TPH-Diesel TPH-Diesel 0.44 26.3 7.87 J mg/kg NWTPH-DX 03/18/14 03/18/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 71 50-150 Octacosane 75 50-150 CH140319-13:06-N1415-D Page 42 of 74

Client Sample ID: SB1-0314 Sample : N/A Sample Time: N/A Type: QC Lab Sample ID: SB1-0314 Received: N/A Dilution Factor: 1 Report Revision No.: 0 Analyte CAS# Sample Qualifier GC Semi-Volatiles TPH-Oil TPH-Oil 1.13 100 1.13 U mg/kg NWTPH-DX TPH-Diesel TPH-Diesel 0.42 25.0 0.81 J mg/kg NWTPH-DX 03/17/14 03/17/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 74 50-150 Octacosane 75 50-150 CH140319-13:06-N1415-D Page 43 of 74

LCS ID: BS1S0314 Report Revision No.: 0 Type: QC Dilution Factor: 1 Spike Sample Analyte CAS# Amount %Recovery GC Semi-Volatiles TPH-Diesel TPH-Diesel 101 67.9 mg/kg 67 NWTPH-DX 03/17/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 73 50-150 Octacosane 74 50-150 CH140319-13:06-N1415-D Page 44 of 74

LCS ID: BS2S0314 Report Revision No.: 0 Type: QC Dilution Factor: 1 Spike Sample Analyte CAS# Amount %Recovery GC Semi-Volatiles TPH-Oil TPH-Oil 102 73.2 mg/kg 71 NWTPH-DX 03/17/14 Surrogate % Recovery Control Limits Qualifier o-terphenyl 72 50-150 Octacosane 70 50-150 CH140319-13:06-N1415-D Page 45 of 74

CASE NARRATIVE METALS ANALYSIS Lab Name: ASL SDG#: N1415 Project: Klamath--Lake Ewauna Project #: 462902.05.03 With the exceptions noted as flags, footnotes, or detailed in the section below; standard operating procedures were followed in the analysis of the samples and no problems were encountered or anomalies observed. All laboratory quality control samples were within established control limits, with any exceptions noted below, or in the associated QC summary forms. Each sample was analyzed to achieve the lowest possible reporting limit within the constraints of the method. For diluted samples, the reporting limits are adjusted for the dilution required. Calculations are performed before rounding to minimize errors in calculated values. All holding times were met and proper preservation noted for the methods performed on these samples, unless otherwise detailed in the section below, or in the sample receipt documentation. (s): SW6020: SW3050 SW7471A Analytical Exception(s): SW6020: Client samples required dilution. Internal standards failed at lower dilutions. Multi-incremental sampling was performed on N141504 and N141505. SW7471A: Multi-incremental sampling was performed on N141504 and N141505. Page 46 of 74 JG140327-15:01-N1415-M

Client Sample ID: SE-1 Lab Sample ID: N141501 Sample : 03/06/14 Sample Time: 14:57 Type: Grab Received: 03/07/14 Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 10 0.097 0.97 0.43 J Barium 10 0.097 0.97 60.1 Cadmium 10 0.097 0.97 0.097 U Chromium 10 0.097 0.97 4.18 Lead 10 0.097 0.97 3.62 Mercury 1 0.011 0.024 0.016 J mg/kg SW7471A METHOD Selenium 10 0.16 0.97 0.24 J Silver 10 0.097 0.97 0.23 J 03/12/14 JG140327-15:01-N1415-M Page 47 of 74

Client Sample ID: SE-2 Lab Sample ID: N141502 Sample : 03/06/14 Sample Time: 15:18 Type: Grab Received: 03/07/14 Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 10 0.13 1.28 2.92 Barium 10 0.13 1.28 94.1 Cadmium 10 0.13 1.28 0.18 J Chromium 10 0.13 1.28 15.5 Lead 10 0.13 1.28 22.5 Mercury 1 0.0094 0.021 0.20 mg/kg SW7471A METHOD Selenium 10 0.21 1.28 0.21 U Silver 10 0.13 1.28 0.13 U 03/12/14 JG140327-15:01-N1415-M Page 48 of 74

Client Sample ID: SE-3 Lab Sample ID: N141503 Sample : 03/06/14 Sample Time: 15:33 Type: Grab Received: 03/07/14 Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 50 1.18 11.8 8.83 J Barium 50 1.18 11.8 92.3 Cadmium 50 1.18 11.8 1.18 U Chromium 50 1.18 11.8 15.9 Lead 50 1.18 11.8 6.61 J Mercury 1 0.021 0.046 0.19 mg/kg SW7471A METHOD Selenium 50 1.88 11.8 1.88 U Silver 50 1.18 11.8 1.18 U 03/12/14 JG140327-15:01-N1415-M Page 49 of 74

Client Sample ID: SE-4 Lab Sample ID: N141504 Sample : 03/06/14 Sample Time: 13:22 Type: Grab Received: 03/07/14 Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 20 0.28 2.77 21.0 Barium 20 0.28 2.77 297 Cadmium 20 0.28 2.77 3.13 Chromium 20 0.28 2.77 40.6 Lead 20 0.28 2.77 461 Mercury 1 0.014 0.032 1.08 mg/kg SW7471A METHOD Selenium 20 0.44 2.77 0.91 J Silver 20 0.28 2.77 1.50 J 03/21/14 03/21/14 03/21/14 03/21/14 03/21/14 03/19/14 03/21/14 03/21/14 JG140327-15:01-N1415-M Page 50 of 74

Client Sample ID: SE-5 Lab Sample ID: N141505 Sample : 03/06/14 Sample Time: 13:40 Type: Grab Received: 03/07/14 Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 20 0.21 2.11 6.78 Barium 20 0.21 2.11 410 Cadmium 20 0.21 2.11 3.03 Chromium 20 0.21 2.11 30.8 Lead 20 0.21 2.11 687 Mercury 1 0.0099 0.022 0.88 mg/kg SW7471A METHOD Selenium 20 0.34 2.11 0.44 J Silver 20 0.21 2.11 1.53 J 03/21/14 03/21/14 03/21/14 03/21/14 03/21/14 03/19/14 03/21/14 03/21/14 JG140327-15:01-N1415-M Page 51 of 74

Client Sample ID: SE-6 Lab Sample ID: N141506 Sample : 03/06/14 Sample Time: 16:45 Type: Grab Received: 03/07/14 Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 20 0.22 2.24 2.74 Barium 20 0.22 2.24 202 Cadmium 20 0.22 2.24 0.32 J Chromium 20 0.22 2.24 22.1 Lead 20 0.22 2.24 40.4 Mercury 1 0.0093 0.021 0.076 mg/kg SW7471A METHOD Selenium 20 0.36 2.24 0.36 U Silver 20 0.22 2.24 0.22 U 03/12/14 JG140327-15:01-N1415-M Page 52 of 74

Client Sample ID: SE-7 Lab Sample ID: N141507 Sample : 03/06/14 Sample Time: 16:30 Type: Grab Received: 03/07/14 Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 10 0.11 1.10 1.57 Barium 10 0.11 1.10 120 Cadmium 10 0.11 1.10 0.67 J Chromium 10 0.11 1.10 14.4 Lead 10 0.11 1.10 35.4 Mercury 1 0.0091 0.020 0.036 mg/kg SW7471A METHOD Selenium 10 0.18 1.10 0.25 J Silver 10 0.11 1.10 0.11 U 03/12/14 JG140327-15:01-N1415-M Page 53 of 74

Client Sample ID: SE-8 Lab Sample ID: N141508 Sample : 03/06/14 Sample Time: 16:10 Type: Grab Received: 03/07/14 Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 10 0.099 0.99 0.30 J Barium 10 0.099 0.99 45.7 Cadmium 10 0.099 0.99 0.099 U Chromium 10 0.099 0.99 4.74 Lead 10 0.099 0.99 14.5 Mercury 1 0.0057 0.013 0.028 mg/kg SW7471A METHOD Selenium 10 0.16 0.99 0.16 U Silver 10 0.099 0.99 0.099 U 03/12/14 JG140327-15:01-N1415-M Page 54 of 74

Client Sample ID: SE-9 Lab Sample ID: N141509 Sample : 03/06/14 Sample Time: 11:55 Type: Grab Received: 03/07/14 Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 10 0.087 0.87 1.21 Barium 10 0.087 0.87 83.2 Cadmium 10 0.087 0.87 0.24 J Chromium 10 0.087 0.87 11.4 Lead 10 0.087 0.87 17.9 Mercury 1 0.0089 0.020 0.050 mg/kg SW7471A METHOD Selenium 10 0.14 0.87 0.21 J Silver 10 0.087 0.87 0.087 U 03/12/14 JG140327-15:01-N1415-M Page 55 of 74

Client Sample ID: SE-10 Lab Sample ID: N141510 Sample : 03/06/14 Sample Time: 11:36 Type: Grab Received: 03/07/14 Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 10 0.12 1.25 0.89 J Barium 10 0.12 1.25 75.5 Cadmium 10 0.12 1.25 0.33 J Chromium 10 0.12 1.25 12.3 Lead 10 0.12 1.25 4.91 Mercury 1 0.012 0.026 0.024 J mg/kg SW7471A METHOD Selenium 10 0.20 1.25 0.25 J Silver 10 0.12 1.25 0.12 U 03/12/14 JG140327-15:01-N1415-M Page 56 of 74

Client Sample ID: SE-11 Lab Sample ID: N141511 Sample : 03/06/14 Sample Time: 11:20 Type: Grab Received: 03/07/14 Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 10 0.12 1.21 0.37 J Barium 10 0.12 1.21 82.1 Cadmium 10 0.12 1.21 0.33 J Chromium 10 0.12 1.21 6.66 Lead 10 0.12 1.21 2.99 Mercury 1 0.010 0.023 0.018 J mg/kg SW7471A METHOD Selenium 10 0.19 1.21 0.21 J Silver 10 0.12 1.21 0.12 U 03/12/14 JG140327-15:01-N1415-M Page 57 of 74

Client Sample ID: SE-12 Lab Sample ID: N141512 Sample : 03/06/14 Sample Time: 10:48 Type: Grab Received: 03/07/14 Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 10 0.086 0.86 1.16 Barium 10 0.086 0.86 74.3 Cadmium 10 0.086 0.86 0.096 J Chromium 10 0.086 0.86 16.6 Lead 10 0.086 0.86 4.66 Mercury 1 0.0060 0.013 0.0064 J mg/kg SW7471A METHOD Selenium 10 0.14 0.86 0.14 U Silver 10 0.086 0.86 0.086 U 03/12/14 JG140327-15:01-N1415-M Page 58 of 74

Client Sample ID: SE-13 Lab Sample ID: N141513 Sample : 03/06/14 Sample Time: 10:20 Type: Grab Received: 03/07/14 Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 20 0.16 1.61 2.45 Barium 20 0.16 1.61 99.1 Cadmium 20 0.16 1.61 0.35 J Chromium 20 0.16 1.61 12.1 Lead 20 0.16 1.61 34.6 Mercury 1 0.0067 0.015 0.064 mg/kg SW7471A METHOD Selenium 20 0.26 1.61 0.26 U Silver 20 0.16 1.61 0.16 U 03/21/14 03/21/14 03/21/14 03/21/14 03/21/14 03/12/14 03/21/14 03/21/14 JG140327-15:01-N1415-M Page 59 of 74

Client Sample ID: SE-14 Lab Sample ID: N141514 Sample : 03/06/14 Sample Time: 09:55 Type: Grab Received: 03/07/14 Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 10 0.093 0.93 0.63 J Barium 10 0.093 0.93 54.4 Cadmium 10 0.093 0.93 0.11 J Chromium 10 0.093 0.93 6.19 Lead 10 0.093 0.93 3.60 Mercury 1 0.0095 0.021 0.039 mg/kg SW7471A METHOD Selenium 10 0.15 0.93 0.17 J Silver 10 0.093 0.93 0.093 U 03/12/14 JG140327-15:01-N1415-M Page 60 of 74

Client Sample ID: SE-15 Lab Sample ID: N141515 Sample : 03/06/14 Sample Time: 09:00 Type: Grab Received: 03/07/14 Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 20 0.23 2.31 2.37 Barium 20 0.23 2.31 97.1 Cadmium 20 0.23 2.31 0.70 J Chromium 20 0.23 2.31 14.3 Lead 20 0.23 2.31 8.42 Mercury 1 0.014 0.031 0.032 mg/kg SW7471A METHOD Selenium 20 0.37 2.31 0.46 J Silver 20 0.23 2.31 0.23 U 03/21/14 03/21/14 03/21/14 03/21/14 03/21/14 03/19/14 03/21/14 03/21/14 JG140327-15:01-N1415-M Page 61 of 74

Client Sample ID: SE-16 Lab Sample ID: N141516 Sample : 03/06/14 Sample Time: 08:28 Type: Grab Received: 03/07/14 Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 20 0.20 2.01 2.74 Barium 20 0.20 2.01 213 Cadmium 20 0.20 2.01 0.45 J Chromium 20 0.20 2.01 14.9 Lead 20 0.20 2.01 18.4 Mercury 1 0.0061 0.014 0.048 mg/kg SW7471A METHOD Selenium 20 0.32 2.01 0.32 U Silver 20 0.20 2.01 0.20 U 03/21/14 03/21/14 03/21/14 03/21/14 03/21/14 03/19/14 03/21/14 03/21/14 JG140327-15:01-N1415-M Page 62 of 74

Client Sample ID: SE-17 Lab Sample ID: N141517 Sample : 03/06/14 Sample Time: 08:00 Type: Grab Received: 03/07/14 Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 20 0.21 2.08 1.24 J Barium 20 0.21 2.08 60.6 Cadmium 20 0.21 2.08 0.23 J Chromium 20 0.21 2.08 14.0 Lead 20 0.21 2.08 11.1 Mercury 1 0.0067 0.015 0.027 mg/kg SW7471A METHOD Selenium 20 0.33 2.08 0.33 U Silver 20 0.21 2.08 0.22 J 03/21/14 03/21/14 03/21/14 03/21/14 03/21/14 03/19/14 03/21/14 03/21/14 JG140327-15:01-N1415-M Page 63 of 74

Blank ID: SB1-0311 Sample : N/A Sample Time: N/A Type: QC Received: N/A Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 1 0.010 0.10 0.010 U Barium 1 0.010 0.10 0.010 U Cadmium 1 0.010 0.10 0.010 U Chromium 1 0.010 0.10 0.017 J Lead 1 0.010 0.10 0.010 U Mercury 1 0.0090 0.020 0.0090 U mg/kg SW7471A METHOD Selenium 1 0.016 0.10 0.016 U Silver 1 0.010 0.10 0.010 U 03/12/14 JG140327-15:01-N1415-M Page 64 of 74

Blank ID: SB1-0319 Sample : N/A Sample Time: N/A Type: QC Received: N/A Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Mercury 200 1.80 4.00 1.80 U mg/kg SW7471A METHOD 03/19/14 JG140327-15:01-N1415-M Page 65 of 74

Blank ID: SB2-0317 Sample : N/A Sample Time: N/A Type: QC Received: N/A Report Revision No: 0 Analyte Metals Dilution Factor Qual Prep Arsenic 1 0.010 0.10 0.010 U Barium 1 0.010 0.10 0.010 U Cadmium 1 0.010 0.10 0.010 U Chromium 1 0.010 0.10 0.010 U Lead 1 0.010 0.10 0.010 U Selenium 1 0.016 0.10 0.016 U Silver 1 0.010 0.10 0.010 U 03/21/14 03/21/14 03/21/14 03/21/14 03/21/14 03/21/14 03/21/14 JG140327-15:01-N1415-M Page 66 of 74

Blank Spike ID: BS1S0311 Report Revision No: 0 Type: QC Dilution Factor: 1 Spike Analyte Amount %Recovery Metals Prep Arsenic 5.00 5.35 mg/kg 107 SW6020 SW3050 Barium 5.00 5.24 mg/kg 105 SW6020 SW3050 Cadmium 5.00 5.54 mg/kg 111 SW6020 SW3050 Chromium 5.00 5.54 mg/kg 111 SW6020 SW3050 Lead 5.00 5.13 mg/kg 103 SW6020 SW3050 Mercury 0.20 0.19 mg/kg 93 SW7471A METHOD Selenium 5.00 5.54 mg/kg 111 SW6020 SW3050 Silver 2.50 2.53 mg/kg 101 SW6020 SW3050 03/12/14 JG140327-15:01-N1415-M Page 67 of 74

Blank Spike ID: BS1S0319 Report Revision No: 0 Type: QC Dilution Factor: 1 Spike Analyte Amount %Recovery Metals Prep Mercury 0.20 0.20 mg/kg 102 SW7471A METHOD 03/19/14 JG140327-15:01-N1415-M Page 68 of 74

Blank Spike ID: BS2S0317 Report Revision No: 0 Type: QC Dilution Factor: 1 Spike Analyte Amount %Recovery Metals Prep Arsenic 5.00 5.05 mg/kg 101 SW6020 SW3050 Barium 5.00 5.02 mg/kg 100 SW6020 SW3050 Cadmium 5.00 5.09 mg/kg 102 SW6020 SW3050 Chromium 5.00 4.97 mg/kg 99 SW6020 SW3050 Lead 5.00 4.95 mg/kg 99 SW6020 SW3050 Selenium 5.00 5.02 mg/kg 100 SW6020 SW3050 Silver 2.50 2.37 mg/kg 95 SW6020 SW3050 03/21/14 03/21/14 03/21/14 03/21/14 03/21/14 03/21/14 03/21/14 JG140327-15:01-N1415-M Page 69 of 74

CASE NARRATIVE GENERAL CHEMISTRY ANALYSIS Lab Name: ASL SDG#: N1415 Project: Klamath--Lake Ewauna Project #: 462902.05.03 With the exceptions noted as flags, footnotes, or detailed in the section below; standard operating procedures were followed in the analysis of the samples and no problems were encountered or anomalies observed. All laboratory quality control samples were within established control limits, with any exceptions noted below, or in the associated QC summary forms. Each sample was analyzed to achieve the lowest possible reporting limit within the constraints of the method. For diluted samples, the reporting limits are adjusted for the dilution required. Calculations are performed before rounding to minimize errors in calculated values. All holding times were met and proper preservation noted for the methods performed on these samples, unless otherwise detailed in the section below, or in the sample receipt documentation. (s): SM2540G Page 70 of 74 BS140314-16:30-N1415-W

Received: 03/07/14 Type: See C.O.C. Lab Batch ID: N1415 : SM2540G : Percent Report Revision No.: 0 Client Sample ID General Chemistry Lab Sample ID Dilution Factor Moisture Qualifier SE-1 N141501 1 N/A N/A 19.9 03/11/14 SE-2 N141502 1 N/A N/A 15.2 03/11/14 SE-3 N141503 1 N/A N/A 57.8 03/11/14 SE-4 N141504 1 N/A N/A 38.8 03/12/14 SE-5 N141505 1 N/A N/A 22.2 03/12/14 SE-6 N141506 1 N/A N/A 23.3 03/11/14 SE-7 N141507 1 N/A N/A 15.2 03/11/14 SE-8 N141508 1 N/A N/A 8.0 03/11/14 SE-9 N141509 1 N/A N/A 16.3 03/11/14 SE-10 N141510 1 N/A N/A 26.4 03/11/14 SE-11 N141511 1 N/A N/A 15.2 03/11/14 SE-12 N141512 1 N/A N/A 12.1 03/11/14 SE-13 N141513 1 N/A N/A 13.8 03/11/14 SE-14 N141514 1 N/A N/A 16.2 03/11/14 SE-15 N141515 1 N/A N/A 47.8 03/11/14 SE-16 N141516 1 N/A N/A 12.9 03/11/14 SE-17 N141517 1 N/A N/A 8.8 03/11/14 BS140314-16:30-N1415-W Page 71 of 74

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CH2M HILL Applied Sciences Laboratory (ASL) 1100 NE Circle Blvd, Suite 300 Tel 541.768.3120 Email: asl@ch2m.com Amended Report : 04/18/14 Client: Klamath Lake Ewauna SDG No.: N1415 Project/Task: Revision No.: 1 Completed by: K. Fordyce Affected (s): SW3010A/SW6010 Approved by: KM Amendment(s) Completed and Reason(s): Additional analyses requested by client. Amendment(s) Justification: X Reporting error Calculation error Missing information/data Wrong information/data Analytical problem/correction Client change/request Subcontracted laboratory error Other (define) Edata Required: X Yes No G:\ASLRTool\PDF_Fractions\N1415\N1415-M-AR.docx Doc Control ID: ASL831-0212

ANALYTICAL REPORT For: Klamath Lake Ewauna ASL Report #: N1415 Project ID: 462902.05.03 Attn: Darren Hippenstiel/PDX cc: Bruce Pratt/CVO Pat Heins/PDX Authorized and Released By: Laboratory Project Manager Kathy McKinley (541) 758 0235 ext.23144 April 18, 2014 All analyses performed by CH2M HILL are clearly indicated. Any subcontracted analyses are included as appended reports as received from the subcontracted laboratory. The results included in this report only relate to the samples listed on the following Sample Cross Reference page. This report shall not be reproduced except in full, without the written approval of the laboratory. Any unusual difficulties encountered during the analysis of your samples are discussed in the attached case narratives. Accredited in accordance with NELAP: Oregon (100022) Arizona (0771) Louisiana (05031) Page 1 of 10

ASL Report #: N1415 Sample Receipt Comments We certify that the test results meet all NELAP requirements. Sample Cross Reference ASL Sample ID Client Sample ID /Time Collected Received N141501 SE 1 03/06/14 14:57 03/07/14 N141502 SE 2 03/06/14 15:18 03/07/14 N141503 SE 3 03/06/14 15:33 03/07/14 N141504 SE 4 03/06/14 13:22 03/07/14 N141505 SE 5 03/06/14 13:40 03/07/14 N141506 SE 6 03/06/14 16:45 03/07/14 N141507 SE 7 03/06/14 16:30 03/07/14 N141508 SE 8 03/06/14 16:10 03/07/14 N141509 SE 9 03/06/14 11:55 03/07/14 N141510 SE 10 03/06/14 11:36 03/07/14 N141511 SE 11 03/06/14 11:20 03/07/14 N141512 SE 12 03/06/14 10:48 03/07/14 N141513 SE 13 03/06/14 10:20 03/07/14 N141514 SE 14 03/06/14 09:55 03/07/14 N141515 SE 15 03/06/14 09:00 03/07/14 N141516 SE 16 03/06/14 08:28 03/07/14 N141517 SE 17 03/06/14 08:00 03/07/14 Page 2 of 10

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