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<br />CALIFORNIA LABORATORY SERVICES <br /> <br />Page 8 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] 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 />Analyte Result <br />Reporting <br />Limit Units <br />Spike <br />Level <br />Source <br />Result %REC <br />%REC <br />Limits RPD <br />RPD <br />Limit Notes <br />Batch 2201177 - LUFT-DHS GCNV <br />LCS (2201177-BS1) Prepared & Analyzed: 02/15/22 <br />Surrogate: Decachlorobiphenyl 8.72 lig/kg 8.33 105 52-141 <br />LCS Dup (2201177-BSD1) Prepared & Analyzed: 02/15/22 <br />Aldrin 14.5 1.0 1.1g/kg 16.7 87 47-132 22 30 <br />gamma-BHC (Lindane) 14.8 1.7 11 16.7 89 56-133 21 30 <br />4,4"-DDT 16.3 3.3 /1 16.7 98 46-137 27 30 <br />Dieldrin 15.0 1.0 <br />11 16.7 90 44-143 26 30 <br />Endrin 15.8 3.3 .. 16.7 95 30-147 26 30 <br />Heptachlor 14.6 1.7 11 16.7 87 33-148 20 30 <br />Surrogate: Tetrachloro-meta-xylene 6.16 11 8.33 74 46-139 <br />Surrogate: Decachlorobiphenyl 7.29 11 8.33 87 52-141 <br />Matrix Spike (2201177-MS1) Source: 22B0639-05 Prepared & Analyzed: 02/15/22 <br />Aldrin 14.4 1.0 fig/kg 16.7 ND 87 47-138 <br />gamma-BHC (Lindane) 15.4 1.7 .. 16.7 ND 92 38-144 <br />4,4"-DDT 22.7 3.3 16.7 ND 136 41-157 <br />Dieldrin 16.6 1.0 16.7 ND 100 46-155 <br />Endrin 17.0 3.3 /1 16.7 ND 102 34-149 <br />Heptachlor 13.8 1.7 16.7 ND 83 36-155 <br />Surrogate: Tetrachloro-meta-xylene 12.3 11 20.8 59 46-139 <br />Surrogate: Decachlorobiphenyl 16.0 20.8 77 52-141 <br />Matrix Spike Dup (2201177-MSD1) Source: 22B0639-05 Prepared & Analyzed: 02/15/22 <br />Aldrin 13.5 1.0 pg/lcg 16.7 ND 81 47-138 7 35 <br />gamma-BHC (Lindane) 14.7 1.7 " 16.7 ND 88 38-144 5 35 <br />4,4"-DDT 21.0 3.3 16.7 ND 126 41-157 8 35 <br />Dieldrin 15.5 1.0 16.7 ND 93 46-155 7 35 <br />Endrin 16.0 3.3 16.7 ND 96 34-149 6 35 <br />Heptachlor 13.1 1.7 16.7 ND 79 36-155 5 35 <br />Surrogate: Tetrachloro-meta-xylene 13.7 20.8 66 46-139 <br />Surrogate: Decachlorobiphenyl 15.5 20.8 74 52-141 <br />3249 Fitzgerald Road, Rancho Cordova, CA 95742 I 800.638.7301 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