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CASTLE ANALYTICAL LABORATORY <br />Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 <br /> Phone: (209) 384-2930 <br />Certificate No. 2480 <br /> Fax: (209) 500-1848 <br />Polychlorinated Biphenyls (PCBs) by GC - Quality Control <br />Castle Analytical Laboratory <br />Reporting Spike Source %REC RPD <br />Analyte Result MDL Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch B108079 - EPA 3510C <br />LCS (B108079-BS1) Prepared & Analyzed: 08/30/21 <br />Surrogate: 2,4,5,6 Teirach1oro-m-xylene <br />Aroclor-1016 <br />Aroclor-1260 <br />LCS Dup (B108079-BSD1) <br />10.9 ug/L <br />238 5.0 10 II <br />98.9 2.0 10 n <br />10.0 109 60-140 <br />200 119 70-130 <br />100 98.9 70-130 <br />Prepared & Analyzed: 08/30/21 <br />Surrogate: 2,4,5,6 Temachloro-m-xylene 11.2 ug/L 10.0 112 60-140 <br />Aroclor-1016 232 5.0 10 200 116 70-130 2.59 20 <br />Aroclor-1260 95.9 2.0 10 <br />/I 100 95.9 70-130 3.08 20 <br />Matrix Spike (B108079-MS1) Source: 2108101-14 Prepared & Analyzed: 08/30/21 <br />Surrogate: 2,4,5,6 Tetrachloro-m-xylene 11.0 ug/L 10.0 110 60-140 <br />Aroclor-1016 241 5.0 10 ,, 200 ND 120 70-130 <br />Aroclor-1260 99.8 2.0 10 100 ND 99.8 70-130 <br />Matrix Spike Dup (B108079-MSD1) Source: 2108101-14 Prepared & Analyzed: 08/30/21 <br />Surrogate: 2,4,5,6 Tetrachloro-m-xylene 11.0 ug/L 10.0 110 60-140 <br />Aroclor-1016 228 5.0 10 " 200 ND 114 70-130 5.47 20 <br />Aroclor-1260 93.9 2.0 10 11 100 ND 93.9 70-130 6.09 20 <br />Batch B108080 - EPA 3550B <br />Blank (B108080-BLK1) Prepared: 08/30/21 Analyzed: 08/31/21 <br />Surrogate: 2,4,5,6 Tetrachloro-m-xylene 0.0427 mg/kg wet 0.0400 107 60-140 <br />Aroclor-1016 ND 0.016 0.050 <br />Aroclor-1221 ND 0.040 0.050 <br />Aroclor-1232 ND 0.016 0.050 <br />Aroclor-1242 ND 0.016 0.050 <br />Aroclor-1248 ND 0.016 0.050 <br />Aroclor-1254 ND 0.0080 0.050 <br />Aroclor-1260 ND 0.0080 0.050 <br />Aroclor-1268 ND 0.0080 0.050 <br />Clad J. Cone / Technical Manager <br />Page 17 of 21