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CASTLE ANALYTICAL LABORATORY 05/18/21 <br />PCB SUMMARY REPORT <br />PG&E - STOCKTON <br />4040 WEST LANE <br />STOCKTON, CA 95204 <br />ATTN: ALEX STEELE / DAVE LARSEN <br />DATE RCVD: 05/18/21 <br />CASTLE ANALYTICAL LABORATORY <br />2333 SHUTTLE DRIVE <br />ATWATER, CA 95301 <br />LAB DIRECTOR - CLARI J. CONE <br />LICENSE CA ELAP 2480 <br />LAB REPORT #:2105054 PROJECT/P0#: 1611 MARIPOSA 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 /> <br />(ppm) <br />(ppm) <br />2105054-01 MARIPOSA 05/17/21 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 />TEST EXTRACTION METHOD PQL <br />APPROVED BY: <br />UNITS TES EQUIPMENT <br />OIL 3580 1.0 mg/Kg (ppm) GC <br />SOIL 3550 0.050 mg/Kg (ppm) SONICATOR/GC <br />WIPE 3550 1.0 Pg/Area SONICATOR/GC <br />WATER 608/3510 0.010/0.0010 mg/L (ppm) LLE/GC <br />Page 1