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CASTLE ANALYTICAL LABORATORY <br />Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 <br /> <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 B108078 - EPA 3550B <br /> <br />Blank (B108078-BLK1) <br /> <br />Prepared & Analyzed: 08/30/21 <br />Surrogate: 2,4,5,6 Tetrachloro-m-xylene <br />Aroclor-1016 <br />Aroclor-1221 <br />Aroclor-1232 <br />Aroclor-1242 <br />Arocl or-1248 <br />Aroclor-1254 <br />Aroclor-1260 <br />Aroclor-1268 <br />0.106 <br />ND 0.20 0.50 <br />ND 0.20 0.50 <br />ND 0.20 0.50 <br />ND 0.20 0.50 <br />ND 0.20 0.50 <br />ND 0.050 0.50 <br />ND 0.050 0.50 <br />ND 0.050 0.50 <br />ug/100cm2 0.100 106 70-130 <br />LCS (B108078-BS1) <br /> <br />Prepared & Analyzed: 08/30/21 <br />Surrogate: 2,4,5,6 Tetrachloro-m-xy1ene 0.111 ug/100cm2 0.100 111 70-130 <br />Aroclor-1016 <br />2.43 0.20 0.50 2.00 121 70-130 <br />Aroclor-1260 <br />0.982 0.050 0.50 o 1.00 98.2 70-130 <br />LCS Dup (B108078-BSD1) Prepared & Analyzed: 08/30/21 <br />Surrogate: 2,4,5,6 Tetrachloro-m-xylene 0.110 ug/I00cm2 0.100 110 70-130 <br />Aroclor-1016 2.43 0.20 0.50 2.00 122 70-130 0.206 20 <br />Aroclor-1260 0.989 0.050 0.50 ” 1.00 98.9 70-130 0.710 20 <br />Batch B108079 - EPA 3510C <br /> <br />Blank (B108079-BLK1) Prepared & Analyzed: 08/30/21 <br />Surrogate: 2,4,5,6 Tetrachloro-m-xylene 10.5 ug L 10.0 105 60-140 <br />Aroclor-1016 ND 5.0 10 <br />Aroclor-1221 ND 10 10 <br />Aroclor-1232 ND 5.0 10 <br />Aroclor-1242 ND 5.0 10 <br />Aroclor-1248 ND 5.0 10 <br />Aroclor-1254 ND 2.0 10 o <br />Aroclor-1260 ND 2.0 10 .. <br />Aroclor-1268 ND 2.0 10 <br />(AviCi <br />Clan J.J. Cone / Technical Manager <br />Page 16 of 21