November 30, Deems Padgett TRC Solutions 1590 Solano Way Concord, CA 94520

Transcription

1 November 30, 2007 Deems Padgett TRC Solutions 1590 Solano Way Concord, CA RE: Summary of Perimeter Zone Monitoring Results Hunters Point Power Plant Decommissioning 1000 Evans Avenue San Francisco, California Dear Mr. Padgett: RGA Environmental, Inc. (RGA) was requested to perform air monitoring at perimeter fence line locations during active abatement and demolition work at the captioned facility. Four (4) air monitoring stations have been established on the property. The locations, testing equipment, analytical methods and air monitoring goals 1 are discussed in the Perimeter Zone Monitoring Procedures. The attached summaries include the following tables: Table I Phase Contrast Microscopy (PCM) air sampling for airborne fibers Table II Metals air sampling for airborne lead, nickel and total chromium Table IIIC Particulates air sampling for airborne dust particles total and respirable dust methods This summary report includes air monitoring data from October 1, 2007 through October 31, None of the average respirable dust, total dust, airborne fibers by PCM, chromium, lead, or nickel results exceeded the footnoted air monitoring goals during the referenced monitoring period. There was a momentary spike that exceeded the respirable dust goal on one (1) of the twenty-three (23) days of monitoring. The spike was short in duration lasting approximately two minutes and was likely attributed to high westerly wind conditions onsite during this day. On October 9 th and 11 th the PCM air samples at air monitoring station (AMS) 4 were voided due to filter damage during sample collection likely caused by excessive moisture in the ambient air. On October 12 th PCM, metals and total dust air samples were voided at AMS 2 due to an electrical failure caused when the ground fault circuit interrupter (GFCI) tripped during sample collection. Protections have been implemented to minimize damage to sample equipment during foul weather. The electrical equipment has also been inspected to identify any faulty components. 1 Air Monitoring Goals: Airborne fibers (asbestos): less than 0.01 fiber per cubic centimeter (f/cc) Total inorganic chromium as a particulate: milligrams per cubic meter (mg/m 3 ) Total inorganic lead as a particulate: mg/m 3 Total inorganic nickel as a particulate: mg/m 3 Particulates less than 10 µm: 0.05 mg/m 3 (retired air monitoring method) Total particulates (dust): 1.0 mg/m 3 Respirable particulates (dust): 0.5 mg/m 3

2 Site conditions continue to be monitored and dust control methods increased during periods of high wind and heavy activity to reduce the potential for spikes. Dust suppression methods include active wetting, street sweeping and low vehicle speed restrictions. Copies of the laboratory reports, chain-of-custody forms, and hourly trend graphs (real-time dust monitors) are available for review in the field office. Respectfully, RGA Environmental, Inc. Kenneth Pilgrim Project Manager Attachments

3 Collection Date AMS RGA Sample # Start: End: Duration Results (Min) f/cc Table I Perimeter Zone Monitoring - PCM PGE Hunters Point Power Plant Decommissioning Wind Conditions Comments 10/1/ P2 7:40 14: < Wind 3-4 West 10/1/ P3 7:35 14: Wind 3-4 West 10/1/ P4 7:30 14: Wind 3-4 West P1 7:20 14: Wind 3-5 West P3 7:25 14: Wind 3-5 West P4 7:30 14: Wind 3-5 West P2 7:00 14: Wind 5-8 West P3 7:05 14: Wind 5-8 West P4 7:10 14: Wind 5-8 West P1 7:05 14: Wind 3-9 West P3 7:10 14: Wind 3-9 West P4 7:15 14: Wind 3-9 West P2 7:30 14: Wind 2-6 West Northwest P3 7:25 14: Wind 2-6 West Northwest P4 7:20 14: Wind 2-6 West Northwest P2 7:00 14: < Wind 2-8 West P3 7:05 14: Wind 2-8 West P4 7:10 14: Wind 2-8 West P1 7:05 14: Wind 6-9 Southeast P3 7:10 14: Wind 6-9 Southeast P4 7:15 14: Wind 6-9 Southeast Not analyzed overloaded wet P2 7:00 14: < Wind 2-5 West P3 7:05 14: Wind 2-5 West P4 7:10 14: Wind 2-5 West Report Date: Monday, November 12, 2007 Page 1 of 3 Report Notes: 1) See Chain-of-Custody for sample flow rate, total volume. 2) Laboratory analysis performed by RJ Lee Group, Inc. in San Leandro, CA 3) Samples collected on 25 mm, 0.8um mixed celloluse ester casettes 4) Samples analyzed in accordance with the National Institute for Occupatoinal Safety and Health Method ) < = Results less than analytical reporting limit for the sample Abbreviations: f/cc = fibers per cubic centimeter, Min. = Minutes, AMS = Air Monitoring Station RGA Environmental, Inc.

4 Collection Date AMS RGA Sample # Start: End: Duration Results (Min) f/cc Wind Conditions Comments P1 7:00 14: < Wind 1-3 West P3 7:05 14: Wind 1-3 West P4 7:10 14: Wind 1-3 West Not analyzed overloaded wet P2 0 Wind 6-7 Southeast AMS-2 lost power no sample P3 7:10 14: < Wind 6-7 Southeast P4 7:15 14: < Wind 6-7 Southeast P2 7:15 14: < Wind 3-5 West P3 7:10 14: < Wind 3-5 West P4 7:05 14: < Wind 3-5 West P1 7:00 14: Wind 3-4 West P3 7:05 14: Wind 3-4 West P4 7:10 14: Wind 3-4 West P2 7:30 14: Wind 2-4 West P3 7:35 14: Wind 2-4 West P4 7:40 14: Wind 2-4 West P1 6:35 14: Wind 2-3 West P3 6:40 14: Wind 2-3 West P4 6:45 14: Wind 2-3 West P2 7:00 14: Wind 3-5 South P3 7:05 14: < Wind 3-5 South P4 7:10 14: Wind 3-5 South P1 7:25 14: Wind 2-6 West P3 7:20 14: Wind 2-6 West P4 7:15 14: Wind 2-6 West P2 7:00 14: Wind 6-15 West P3 7:05 14: Wind 6-15 West P4 7:10 14: Wind 6-15 West Report Date: Monday, November 12, 2007 Page 2 of 3 Report Notes: 1) See Chain-of-Custody for sample flow rate, total volume. 2) Laboratory analysis performed by RJ Lee Group, Inc. in San Leandro, CA 3) Samples collected on 25 mm, 0.8um mixed celloluse ester casettes 4) Samples analyzed in accordance with the National Institute for Occupatoinal Safety and Health Method ) < = Results less than analytical reporting limit for the sample Abbreviations: f/cc = fibers per cubic centimeter, Min. = Minutes, AMS = Air Monitoring Station RGA Environmental, Inc.

5 Collection Date AMS RGA Sample # Start: End: Duration Results (Min) f/cc Wind Conditions Comments P1 7:00 14: Wind 5-10 West P3 7:05 14: Wind 5-10 West P4 7:10 14: Wind 5-10 West P2 7:15 14: < Wind 3-8 West Northwest P3 7:20 14: < Wind 3-8 West Northwest P4 7:25 14: Wind 3-8 West Northwest P1 7:10 14: Wind 4-8 West P3 7:15 14: Wind 4-8 West P4 7:20 14: < Wind 4-8 West P2 7:25 14: Wind 2-6 Southeast P3 7:30 14: < Wind 2-6 Southeast P4 7:35 14: < Wind 2-6 Southeast P1 7:15 14: Wind 4-7 West P3 7:10 14: Wind 4-7 West P4 7:05 14: Wind 4-7 West 10/31/ P2 6:55 14: Wind 4-9 West Northwest 10/31/ P3 6:50 14: Wind 4-9 West Northwest 10/31/ P4 6:45 14: < Wind 4-9 West Northwest Report Date: Monday, November 12, 2007 Page 3 of 3 Report Notes: 1) See Chain-of-Custody for sample flow rate, total volume. 2) Laboratory analysis performed by RJ Lee Group, Inc. in San Leandro, CA 3) Samples collected on 25 mm, 0.8um mixed celloluse ester casettes 4) Samples analyzed in accordance with the National Institute for Occupatoinal Safety and Health Method ) < = Results less than analytical reporting limit for the sample Abbreviations: f/cc = fibers per cubic centimeter, Min. = Minutes, AMS = Air Monitoring Station RGA Environmental, Inc.

6 Table II Perimeter Zone Monitoring - Metals PGE Hunters Point Power Plant Decommissioning Collection Date AMS RGA Sample # Start: End: Duration Chromium (Min) (mg/m3) Lead (mg/m3) Nickel (mg/m3) Wind Conditions: Comments 10/1/ P1 7:40 14: < < < Wind 3-4 West 10/1/ P3 7:35 14: < < Wind 3-4 West 10/1/ P4 7:30 14: < < Wind 3-4 West P1 7:20 14: < < < Wind 3-5 West P3 7:25 14: < < < Wind 3-5 West P4 7:30 14: < < < Wind 3-5 West P2 7:00 14: < < < Wind 5-8 West P3 7:05 14: < < < Wind 5-8 West P4 7:10 14: < < Wind 5-8 West P1 7:05 14: < < < Wind 3-9 West P3 7:10 14: < < < Wind 3-9 West P4 7:15 14: < < < Wind 3-9 West P2 7:30 14: < < < Wind 2-6 West Northwest P3 7:25 14: < < < Wind 2-6 West Northwest P4 7:20 14: < < < Wind 2-6 West Northwest P2 7:00 14: < < < Wind 2-8 West P3 7:05 14: < < < Wind 2-8 West P4 7:10 14: < < < Wind 2-8 West P1 7:05 14: < < < Wind 6-9 Southeast P3 7:10 14: < < < Wind 6-9 Southeast P4 7:15 14: < < Wind 6-9 Southeast P2 7:00 14: < < < Wind 2-5 West P3 7:05 14: < < < Wind 2-5 West P4 7:10 14: < < Wind 2-5 West P1 7:00 14: < < < Wind 1-3 West P3 7:05 14: < < < Wind 1-3 West P4 7:10 14: < < < Wind 1-3 West P2 Wind 6-7 Southeast AMS-2 lost power no sample P3 7:10 14: < < < Wind 6-7 Southeast P4 7:15 14: < < Wind 6-7 Southeast Report Date: Monday, November 12, 2007 Page 1 of 3 Report Notes: 1) See Chain-of-Custody for sample flow rate, total volume 2) Laboratory analysis performed by RJ Lee Group, Inc. in Monroeville, PA 3) Samples collected on 37 mm, 0.8um mixed celloluse ester casettes 4) Samples analyzed in accordance with the National Institute for Occupatoinal Safety and Health Method 7300/7300-PA 5) < = Results less than analytical reporting limit for the sample Abbreviations: mg/m3 = milligrams per cubic meter, Min. = Minutes, AMS = Air Monitoring Station RGA Environmental, Inc.

7 Collection Date AMS RGA Sample # Start: End: Duration Chromium (Min) (mg/m3) Lead (mg/m3) Nickel (mg/m3) Wind Conditions: Comments P2 7:15 14: < < < Wind 3-5 West P3 7:10 14: < < < Wind 3-5 West P4 7:05 14: < < Wind 3-5 West P1 7:00 14: < < < Wind 3-4 West P3 7:05 14: < < < Wind 3-4 West P4 7:10 14: < < Wind 3-4 West P2 7:30 14: < < < Wind 2-4 West P3 7:35 14: < < < Wind 2-4 West P4 7:40 14: < < < Wind 2-4 West P1 6:35 14: < < < Wind 2-3 West P3 6:40 14: < < < Wind 2-3 West P4 6:45 14: < < < Wind 2-3 West P2 7:00 14: < < < Wind 3-5 South P3 7:05 14: < < < Wind 3-5 South P4 7:10 14: < < < Wind 3-5 South P1 7:25 14: < < < Wind 2-6 West P3 7:20 14: < < < Wind 2-6 West P4 7:15 14: < < < Wind 2-6 West P2 7:00 14: < < < Wind 6-15 West P3 7:05 14: < < < Wind 6-15 West P4 7:10 14: < < < Wind 6-15 West P1 7:00 14: < < < Wind 5-10 West P3 7:05 14: < < < Wind 5-10 West P4 7:10 14: < < < Wind 5-10 West P2 7:15 14: < < < Wind 3-8 West Northwest P3 7:20 14: < < < Wind 3-8 West Northwest P4 7:25 14: < < < Wind 3-8 West Northwest P1 7:10 14: < < < Wind 4-8 West P3 7:15 14: < < < Wind 4-8 West P4 7:20 14: < < < Wind 4-8 West P2 7:25 14: < < < Wind 2-6 Southeast P3 7:30 14: < < < Wind 2-6 Southeast P4 7:35 14: < < < Wind 2-6 Southeast Report Date: Monday, November 12, 2007 Page 2 of 3 Report Notes: 1) See Chain-of-Custody for sample flow rate, total volume 2) Laboratory analysis performed by RJ Lee Group, Inc. in Monroeville, PA 3) Samples collected on 37 mm, 0.8um mixed celloluse ester casettes 4) Samples analyzed in accordance with the National Institute for Occupatoinal Safety and Health Method 7300/7300-PA 5) < = Results less than analytical reporting limit for the sample Abbreviations: mg/m3 = milligrams per cubic meter, Min. = Minutes, AMS = Air Monitoring Station RGA Environmental, Inc.

8 Collection Date AMS RGA Sample # Start: End: Duration Chromium (Min) (mg/m3) Lead (mg/m3) Nickel (mg/m3) Wind Conditions: Comments P1 7:15 14: < < < Wind 4-7 West P3 7:10 14: < < < Wind 4-7 West P4 7:05 14: < < Wind 4-7 West 10/31/ P2 6:55 14: < < Wind 4-9 West Northwest 10/31/ P3 6:50 14: < < Wind 4-9 West Northwest 10/31/ P4 6:45 14: < < < Wind 4-9 West Northwest Report Date: Monday, November 12, 2007 Page 3 of 3 Report Notes: 1) See Chain-of-Custody for sample flow rate, total volume 2) Laboratory analysis performed by RJ Lee Group, Inc. in Monroeville, PA 3) Samples collected on 37 mm, 0.8um mixed celloluse ester casettes 4) Samples analyzed in accordance with the National Institute for Occupatoinal Safety and Health Method 7300/7300-PA 5) < = Results less than analytical reporting limit for the sample Abbreviations: mg/m3 = milligrams per cubic meter, Min. = Minutes, AMS = Air Monitoring Station RGA Environmental, Inc.

9 Collection Date AMS RGA Sample # Table III C Perimeter Zone Monitoring - Total and Respirable Particulates PGE Hunters Point Power Plant Decommissioning Gravimetric Dust Aerosol - Total Sample Start Sample End Duration (Min) Results mg/m3 Sample Start Sample End Real - Time Dust Aerosol - Respirable Duration: (Min) Min mg/m3: Max mg/m3: TWA mg/m3 Wind Conditions Comments 10/1/ P2 7:40 14: < :43 14: Wind 3-4 West Cleaned and Calibrated D.T. Unit 10/1/ P3 7:35 14: :24 14: Wind 3-4 West Cleaned and Calibrated D.T. Unit 10/1/ P4 7:30 14: :14 14: Wind 3-4 West Cleaned and Calibrated D.T. Unit P1 7:20 14: :45 14: Wind 3-5 West P3 7:25 14: :28 14: Wind 3-5 West P4 7:30 14: :31 14: Wind 3-5 West P2 7:00 14: :23 14: Wind 5-8 West P3 7:05 14: :04 14: Wind 5-8 West P4 7:10 14: :08 14: Wind 5-8 West P1 7:05 14: < :31 14: Wind 3-9 West P3 7:10 14: < :12 14: Wind 3-9 West P4 7:15 14: :15 14: Wind 3-9 West P1 7:30 14: :56 14: Wind 2-6 West Northwest P3 7:25 14: :29 14: Wind 2-6 West Northwest P4 7:20 14: :26 14: Wind 2-6 West Northwest P2 7:00 14: < :28 14: Wind 2-8 West P3 7:05 14: :09 14: Wind 2-8 West P4 7:10 14: :15 14: Wind 2-8 West Report Date: Monday, November 12, 2007 Page 1 of 4 Report Notes: 1) See Chain-of-Custody for sample flow rate, total volume 2) Laboratory analysis performed by RJ Lee Group, Inc. in Monroeville, PA 3) Samples collected on 37 mm, 5um poly vinyl chloride (PVC) cassette 4) Samples analyzed in accordance with the National Institute for Occupatoinal Safety and Health Method ) < = Results less than analytical reporting limit for the sample Abbreviations: mg/m3 = milligrams per cubic meter, Min. = Minutes, AMS = Air Monitoring Station RGA Environmental, Inc.

10 Collection Date AMS RGA Sample # Gravimetric Dust Aerosol - Total Sample Start Sample End Duration (Min) Results mg/m3 Sample Start Sample End Real - Time Dust Aerosol - Respirable Duration: (Min) Min mg/m3: Max mg/m3: TWA mg/m3 Wind Conditions Comments P1 7:05 14: :35 14: Wind 6-9 Southeast P3 7:10 14: :20 14: Wind 6-9 Southeast P4 7:15 14: :16 14: Wind 6-9 Southeast P2 7:00 14: :24 14: Wind 2-5 West P3 7:05 14: :05 14: Wind 2-5 West P4 7:10 14: :06 14: Wind 2-5 West P1 7:00 14: < :29 14: Wind 1-3 West P3 7:05 14: :11 14: Wind 1-3 West P4 7:10 14: :13 14: Wind 1-3 West P2 7:44 14: Wind 6-7 Southeast AMS-2 lost power no sample P3 7:10 14: < :18 14: Wind 6-7 Southeast P4 7:15 14: < :15 14: Wind 6-7 Southeast P2 7:15 14: :50 14: Wind 3-5 West P3 7:10 14: :45 14: Wind 3-5 West P4 7:05 14: :18 14: Wind 3-5 West P1 7:00 14: :26 14: Wind 3-4 West P3 7:05 14: :07 14: Wind 3-4 West P4 7:10 14: :10 14: Wind 3-4 West P2 7:30 14: :10 14: Wind 2-4 West P3 7:35 14: :52 14: Wind 2-4 West P4 7:40 14: :56 14: Wind 2-4 West P1 6:35 14: :01 14: Wind 2-3 West P3 6:40 14: :44 14: Wind 2-3 West P4 6:45 14: :47 14: Wind 2-3 West Report Date: Monday, November 12, 2007 Page 2 of 4 Report Notes: 1) See Chain-of-Custody for sample flow rate, total volume 2) Laboratory analysis performed by RJ Lee Group, Inc. in Monroeville, PA 3) Samples collected on 37 mm, 5um poly vinyl chloride (PVC) cassette 4) Samples analyzed in accordance with the National Institute for Occupatoinal Safety and Health Method ) < = Results less than analytical reporting limit for the sample Abbreviations: mg/m3 = milligrams per cubic meter, Min. = Minutes, AMS = Air Monitoring Station RGA Environmental, Inc.

11 Collection Date AMS RGA Sample # Gravimetric Dust Aerosol - Total Sample Start Sample End Duration (Min) Results mg/m3 Sample Start Sample End Real - Time Dust Aerosol - Respirable Duration: (Min) Min mg/m3: Max mg/m3: TWA mg/m3 Wind Conditions Comments P2 7:00 14: :26 14: Wind 3-5 South P3 7:05 14: :06 14: Wind 3-5 South P4 7:10 14: :09 14: Wind 3-5 South P1 7:25 14: :03 14: Wind 2-6 West P3 7:20 14: :31 14: Wind 2-6 West P4 7:15 14: :27 14: Wind 2-6 West P2 7:00 14: :28 14: Wind 6-15 West High winds this day P3 7:05 14: :10 14: Wind 6-15 West High winds this day P4 7:10 14: :12 14: Wind 6-15 West High winds this day P1 7:00 14: :30 14: Wind 5-10 West P3 7:05 14: :39 14: Wind 5-10 West D.T. unit switched to P4 7:10 14: :14 14: Wind 5-10 West P2 7:15 14: :40 14: Wind 3-8 West Northwest P3 7:20 14: :48 14: Wind 3-8 West Northwest P4 7:25 14: < :22 14: Wind 3-8 West Northwest P1 7:10 14: :37 14: Wind 4-8 West P3 7:15 14: :47 14: Wind 4-8 West P4 7:20 14: :20 14: Wind 4-8 West P2 7:25 14: :01 14: Wind 2-6 Southeast P3 7:30 14: :11 14: Wind 2-6 Southeast P4 7:35 14: :46 14: Wind 2-6 Southeast Report Date: Monday, November 12, 2007 Page 3 of 4 Report Notes: 1) See Chain-of-Custody for sample flow rate, total volume 2) Laboratory analysis performed by RJ Lee Group, Inc. in Monroeville, PA 3) Samples collected on 37 mm, 5um poly vinyl chloride (PVC) cassette 4) Samples analyzed in accordance with the National Institute for Occupatoinal Safety and Health Method ) < = Results less than analytical reporting limit for the sample Abbreviations: mg/m3 = milligrams per cubic meter, Min. = Minutes, AMS = Air Monitoring Station RGA Environmental, Inc.

12 Collection Date AMS RGA Sample # Gravimetric Dust Aerosol - Total Sample Start Sample End Duration (Min) Results mg/m3 Sample Start Sample End Real - Time Dust Aerosol - Respirable Duration: (Min) Min mg/m3: Max mg/m3: TWA mg/m3 Wind Conditions Comments P1 7:15 14: :49 14: Wind 4-7 West P3 7:10 14: :40 14: Wind 4-7 West P4 7:05 14: :18 14: Wind 4-7 West 10/31/ P2 6:55 14: :20 14: Wind 4-9 West Northwest 10/31/ P3 6:50 14: :22 14: Wind 4-9 West Northwest 10/31/ P4 6:45 14: :48 14: Wind 4-9 West Northwest Report Date: Monday, November 12, 2007 Page 4 of 4 Report Notes: 1) See Chain-of-Custody for sample flow rate, total volume 2) Laboratory analysis performed by RJ Lee Group, Inc. in Monroeville, PA 3) Samples collected on 37 mm, 5um poly vinyl chloride (PVC) cassette 4) Samples analyzed in accordance with the National Institute for Occupatoinal Safety and Health Method ) < = Results less than analytical reporting limit for the sample Abbreviations: mg/m3 = milligrams per cubic meter, Min. = Minutes, AMS = Air Monitoring Station RGA Environmental, Inc.

13 Total Dust Air Monitoring Station 1 Permissible Exposure Limit mg/m3 Perimeter Zone Monitoring Data AMS 1

14 Total Dust Air Monitoring Station 2 10/1/ /31/2007 Permissible Exposure Limit mg/m3 Perimeter Zone Monitoring Data AMS 2 Sample voided on due to electrical failure

15 Total Dust Air Monitoring Station 3 10/1/ /31/2007 Permissible Exposure Limit mg/m3 Perimeter Zone Monitoring Data AMS 3

16 Total Dust Air Monitoring Station 4 10/31/2007 Permissible Exposure Limit mg/m3 Perimeter Zone Monitoring Data AMS 4

17 Respirable Dust by Real-time Instrumentation Air Monitoring Station Permissible Exposure Limit mg/m3 Respirable Dust Daily Peak Values Respirable Dust Average Daily Values

18 Respirable Dust by Real-time Instrumentation Air Monitoring Station /1/ /31/2007 Respirable Dust Daily Peak Values Respirable Dust Average Daily Values Permissible Exposure Limit mg/m3

19 Respirable Dust by Real-time Instrumentation Air Monitoring Station 3 10/1/ /31/2007 Permissible Exposure Limit mg/m3 Respirable Dust Daily Peak Values Respirable Dust Average Daily Values

20 Respirable Dust by Real-time Instrumentation Air Monitoring Station /1/ /31/2007 Respirable Dust Daily Peak Values Respirable Dust Average Daily Values Permissible Exposure Limit mg/m3

21 Airborne Fibers Analyzed by Phase Contrast Microscopy Air Monitoring Station 1 Fibers/cubic centimeter (F/cc) Permissible Exposure Limit f/cc Perimeter Zone Monitoring Data AMS 1

22 Airborne Fibers Analyzed by Phase Contrast Microscopy Air Monitoring Station 2 10/1/07 10/2/07 10/3/07 Fibers/cubic centimeter 10/4/07 10/5/07 10/6/07 10/7/07 10/8/07 10/9/07 10/10/07 10/11/07 10/12/07 10/13/07 10/14/07 10/15/07 10/16/07 10/17/07 10/18/07 10/19/07 10/20/07 10/21/07 10/22/07 10/23/07 10/24/07 10/25/07 10/26/07 10/27/07 10/28/07 10/29/07 10/30/07 10/31/07 Perimeter Zone Monitoring Data AMS 2 Permissible Exposure Limit f/cc Sample voided on due to electrical failure

23 Airborne Fibers Analyzed by Phase Contrast Microscopy Air Monitoring Station 3 10/1/07 10/2/07 10/3/07 Fibers/cubic centimeter (F/cc) 10/4/07 10/5/07 10/6/07 10/7/07 10/8/07 10/9/07 10/10/07 10/11/07 10/12/07 10/13/07 10/14/07 10/15/07 10/16/07 10/17/07 10/18/07 10/19/07 10/20/07 10/21/07 10/22/07 10/23/07 10/24/07 10/25/07 10/26/07 10/27/07 10/28/07 10/29/07 10/30/07 10/31/07 Perimeter Zone Monitoring Data AMS 3 Permissible Exposure Limit f/cc

24 Airborne Fibers Analyzed by Phase Contrast Microscopy Air Monitoring Station 4 Permissible Exposure Limit f/cc 10/1/2007 Fibers/cubic centimeter (F/cc) 10/31/2007 Perimeter Zone Monitoring Data AMS 4 Samples voided on and due to filter damage

25 Chromium (total) Air Monitoring Station 1 Permissible Exposure Limit mg/m mg/m3 Perimeter Zone Monitoring Data AMS 1

26 Chromium (total) Air Monitoring Station 2 10/1/ /31/2007 Permissible Exposure Limit mg/m mg/m3 Perimeter Zone Monitoring Data AMS 2 Sample voided on due to electrical failure

27 Chromium (total) Air Monitoring Station 3 10/1/ /31/2007 Permissible Exposure Limit mg/m mg/m3 Perimeter Zone Monitoring Data AMS 3

28 Chromium (total) Air Monitoring Station 4 10/1/ /31/2007 Permissible Exposure Limit mg/m mg/m3 Perimeter Zone Monitoring Data AMS 4

29 Lead (total) Air Monitoring Station 1 Permissible Exposure Limit mg/m3 Perimeter Zone Monitoring Data AMS mg/m3

30 Lead (total) Air Monitoring Station 2 10/1/ /31/2007 Permissible Exposure Limit mg/m3 Perimeter Zone Monitoring Data AMS 2 Sample voided on due to electrical failure mg/m3

31 Lead (total) Air Monitoring Station 3 10/1/ /31/2007 Permissible Exposure Limit mg/m3 Perimeter Zone Monitoring Data AMS mg/m3

32 Lead (total) Air Monitoring Station 4 10/1/ /31/2007 Permissible Exposure Limit mg/m mg/m3 Perimeter Zone Monitoring Data AMS 4

33 Nickel (total) Air Monitoring Station 1 Permissible Exposure Limit mg/m mg/m3 Perimeter Zone Monitoring Data AMS 1

34 Nickel (total) Air Monitoring Station 2 Permissible Exposure Limit mg/m mg/m3 10/1/ /31/2007 Perimeter Zone Monitoring Data AMS 2 Sample voided on due to electrical failure

35 Nickel (total) Air Monitoring Station 3 Permissible Exposure Limit mg/m mg/m3 Perimeter Zone Monitoring Data AMS 3 10/1/ /31/2007

36 Nickel (total) Air Monitoring Station 4 Permissible Exposure Limit mg/m mg/m3 Perimeter Zone Monitoring Data AMS 4 10/1/ /31/2007