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CASTLE ANALYTICAL LABORATORY <br />07/06/20 <br />PCB SUMMARY REPORT <br />PG&E - STOCKTON CASTLE ANALYTICAL LABORATORY <br />4040 WEST LANE 2333 SHUTTLE DRIVE <br />STOCKTON, CA 95204 ATWATER, CA 95301 <br />ATTN: ALEX STEELE / DAVE LARSEN LAB DIRECTOR - CLARI J. CONE <br />DATE RCVD: 07/06/20 LICENSE CA ELAP 2480 <br />LAB REPORT #:2007023 PROJECT/P0#:ARNSTRONG RD. <br />Below is a listing of the samples received together with the laboratory results on <br />their respective PCB content. Please contact the lab at 209-384-2930 if you have <br />any questions regarding these sample results. <br />PCB <br />LAB I.D. SAMPLE I.D. DATE AROCLOR RESULT PQL MATRIX <br />(PPni) <br /> <br />(PPrn) <br />2007023-01 A 07/05/20 ND 1.0 OIL <br />EMERGENCY <br />2007023-02 <br /> 07/05/20 ND 1.0 OIL <br />EMERGENCY <br />The following table shows the methods and detection limits used, all tests use EPA <br />SW846 Method 8082; quantification 7.9.3, PQL = Practical Quanitation Limit. <br />ND = non-detect. <br />APPROVED BY: LIi W ue <br />TEST EXTRACTION METHOD UNITS T ST EQUIPMENT PQL <br />OIL <br />SOIL <br />WIPE <br />WATER <br />3580 <br />3550 <br />3550 <br />608/3510 <br /> <br />1.0 mg/Kg (ppm) <br />0.050 mg/Kg (ppm) <br /> <br />1.0 µg/Area <br />0.010/0.0010 mg/L (ppm) <br />GC <br />SONICATOR/GC <br />SONICATOR/GC <br />LLE/GC <br />Page 1