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APPLIED TECHNOLOGY SERVICES (ATS) 562.1-11.29 LABORATORY TEST REPORT Pacific Ga wd IN &G-" SUBJECT: POST CLEAN UP ANALYSIS OF TRANSFORMER OIL SPILL FOR PCB AT 124 NORTH E STREET, STOCKTON ATS CHEMISTRY SERVICES UNIT FILE 1103-002 On February 23, 2011, John Holliday of ATS collected post clean up samples in areas impacted by a transformer oil spill near 124 North E Street, Stockton, Ca. Prior to sampling,the asphalt portion of the spill site was cleaned with Penetone solution and two inches of impacted soil was excavated by Philips Transportation Services. Wipe samples were collected on 100-square centimeter cotton gauze strips that were saturated with hexane:The soil samples were collected in 8-oz glass jars. The samples were transferred under chain of custody to Test America Laboratories, Pleasanton, Ca. The samples were prepared and analyzed for polychlorinated biphenlys(PCBs) by EPA Method 8082. The test results are summarized below and a sampling location diagram is attached. Samole ID Sample Type PCB Concentration Aroclor NE-1 Wipe 3.1 ug per 100 cm2 1254 NE-2 Wipe 5.9 ug per 100 cm2 1254 NE-3 Wipe 8.6 ug per 100 cm2 1254 NE-4 Wipe 1.4 ug per 100 cm2 1254 NE-5 Wipe 0.77 ug per 100 cm2 1254 NE-6 Wipe 0.33 ug per 100 cm2 1254 NE-7 Wipe 7.1 ug per 100 cm2 1254 NE-8 Wipe 1.9 ug per 100 cm2 1254 NE-9 Wipe 14 ug per 100 cm' 1254 NE-10 Wipe 19 ug per 100 cm2 1254 NE-11 Wipe 24 ug per 100 cm2 1254 NE-12 Wipe 0.64 ug per 100 cm2 1254 NE-13 Soil 0.37 mg/kg 1254 NE-14 Soil 0.11 mg/kg 1254 NE-15 Soil 0.21 mg/kg 1254 NE-16 Soil 0.28 mg/kg 1254 NE-17 Soil 0.17 mg/kg 1254 NE-18 Soil 0.09 mg/kg 1254 NE-19 Soil 1.1 mg/kg 1254 NE-20 Soil 1.0 mg/kg 1254 NE-21 Soil 2.9 mglkg 1254 The Test America laboratory test report and PG&E's chain of custody form are attached. pc: Alex Steele Date: March 1, 2011 Tested by: John Holliday Approved by: Clement O. Da Silva