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<br />CALIFORNIA LABORATORY SERVICES <br /> <br />Page 7 of 15 <br />Committed. Responsive. Flexible. <br /> <br />02/17/22 12:03 <br />Precision Enviro-Tech <br /> <br />Project: 2020807 <br />3935 N. Coronado Ave Project Number: [none] <br /> <br />CLS Work Order #: 22B0827 <br />Stockton, CA 95204 <br /> <br />Project Manager: Jonathan HV Lee COC #: <br />Organochlorine Pesticides by EPA Method 8081A - Quality Control <br />Reporting Spike Source %REC RPD <br />Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 2201177- LUFT-DHS GCNV <br />Blank (2201177-BLK1) Prepared & Analyzed: 02/15/22 <br />Aldrin ND 1.0 µg/kg <br />alpha-BHC ND 1.7 <br />beta-BHC ND 1.7 <br />gamma-BHC (Lindane) ND 1.7 ., <br />delta-BHC ND 1.7 <br />Chlordane-technical ND 3.3 II <br />4,4"-DDD ND 3.3 II <br />4,4"-DDE ND 3.3 " <br />4,4"-DDT ND 3.3 " <br />Dieldrin ND 1.0 ” <br />Endosulfan I ND 1.7 <br />Endosulfan II ND 3.3 II <br />Endosulfan sulfate ND 3.3 <br />Endrin ND 3.3 " <br />Endrin aldehyde ND 3.3 " <br />Heptachlor ND 1.7 " <br />Heptachlor epoxide ND 1.7 I/ <br />Methoxychlor ND 17 n <br />Mirex ND 33 " <br />Toxaphene ND 20 ft <br />Surrogate: Tetrachloro-meta-xy1ene 7.86 8.33 94 46-139 <br />Surrogate: Decachlorobiphenyl 9.27 8.33 111 52-141 <br />LCS (2201177-BS1) Prepared & Analyzed: 02/15/22 <br />Aldrin 18.2 1.0 µg/kg 16.7 109 47-132 <br />gamma-BHC (Lindane) 18.3 1.7 t, 16.7 110 56-133 <br />4,4"-DDT 21.5 3.3 ,t 16.7 129 46-137 <br />Dieldrin 19.5 1.0 " 16.7 117 44-143 <br />Endrin 20.5 3.3 ,. 16.7 123 30-147 <br />Heptachlor 17.8 1.7 ,, 16.7 107 33-148 <br />Surrogate: Tetrachloro-meta-xylene 6.40 8.33 77 46-139 <br />3249 Fitzgerald Road, Rancho Cordova, CA 95742 I 800.638.7301 I Tel: 916.638.7301 x102 I Fax: 916.638.4510 I www.californialab.com <br />Small Business #2916 I ELAP #1233 I NAICS #541380 I CA SWRCB ELAP Accreditation/Registration Number 1233