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CALIFORNIA LABORATORY SERVICES <br /> Committed. Responsive. Flexible. <br /> Page 3 of 4 <br /> 11/06/1915:17 <br /> Precision Enviro-Tech Project: 9102905 <br /> 3935 N.Coronado Ave Project Number: [none] CLS Work Order#:19J1834 <br /> Stockton,CA 95204 Project Manager: Jonathan HV Lee COC#: <br /> EDB and DBCP by EPA Method 504.1 - Quality Control <br /> Reporting Spike Source %REC RPD <br /> Analyte7 Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1909212-EPA 504.1 <br /> Blank(1909212-BLKI) Prepared:10/31/19 Analyzed:11/01/19 <br /> Ethylene dibromide ND 0.020 99/1, <br /> 1,2-Dibromo-3-chloropropaae ND 0.010 " <br /> LCS(1909212-BSI) Prepared:10/31/19 Analyzed:11/01/19 <br /> Ethylene dibromide 0.282 0.020 119/1, 0.286 99 70-130 <br /> 1,2-Dibromo-3-chloropropane 0.289 0.010 0.286 101 70-130 <br /> LCS Dup(1909212-BSDI) Prepared:10/31/19 Analyzed:11/01/19 <br /> Ethylene dibromide 0.346 0.020 µg/L 0.286 121 70-130 20 30 <br /> 1,2-Dibromo-3-chloropropane 0.290 0.010 0.286 101 70-130 0.4 30 <br /> Matrix Spike(1909212-MSI) Source:19J1844-01 Prepared:10/31/19 Analyzed: 11/01/19 <br /> Ethylene dibromide 0.332 0.20 µg/L 0.286 ND 116 65-135 <br /> 1,2-Drbromo-3-chloropropane 0.256 0.10 0.286 ND 90 65-135 <br /> Matrix Spike Dup(1909212-MSDI) Source:19J1844-01 Prepared:10/31/19 Analyzed: 11/01/19 <br /> Ethylene dibromide 0.250 0.20 µg/L 0.286 ND 87 65-135 28 30 <br /> 1,2-Dibromo-3-chloropropane 0.295 0.10 0.286 ND 103 65-135 14 30 <br /> 1' <br /> 3249 Fitzgerald Road,Rancho Cordova,CA 95742 1 800.638.7301 1 Tel:916.638.7301 x102 I Fax:916.638.4510 1 www.californiciab.com <br /> Small Business#2916 1 ELAP#1233 1 NAICS#541380 I CA SWRCB ELAP Accreditation/Registration Number 1233 <br />