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<br />CALIFORNIA LABORATORY SERVICES <br /> <br />Page 7 of 8 <br />Committed. Responsive. Flexible. <br /> <br />03/15/22 13:13 <br />RAH Environmental, Inc. - Sacramento Project: Acampo/Woodbridge Road Excavation <br />4645 Raley Boulevard <br />Project Number: [none] CLS Work Order #: 22C0482 <br />Sacramento, CA 95838 <br />Project Manager: Raymond A. Henry Jr. COC #: 218707 <br />Volatile Organic Compounds by EPA Method 8260B - Quality Control <br />Analyte <br />Reporting <br />Result Limit Units <br />Spike Source %REC <br />Level Result %REC Limits RPD <br />RPD <br />Limit Notes <br />Batch 2201760 - EPA 5030 Soil MS <br />Blank (2201760-BLK1) Prepared: 03/07/22 Analyzed: 03/10/22 <br />Di-isopropyl ether ND 5.0 jig/kg <br />Ethyl tert-butyl ether ND 5.0 <br />Methyl tert-butyl ether ND 5.0 <br />tert-Amyl methyl ether ND 5.0 <br />tert-Butyl alcohol ND 50 <br />Benzene ND 5.0 <br />Ethylbenzene ND 5.0 <br />Toluene ND 5.0 <br />Xylenes (total) ND 10 <br />Surrogate: Toluene-d8 25.1 30.0 84 60-140 <br />LCS (2201760-BS1) Prepared: 03/07/22 Analyzed: 03/10/22 <br />Methyl tert-butyl ether 30.8 5.0 µg/kg 20.0 154 60-140 QM-1 <br />Benzene 22.3 5.0 20.0 III 60-140 <br />Surrogate: Toluene-d8 29.7 30.0 99 60-140 <br />LCS Dup (2201760-BSD1) Prepared: 03/07/22 Analyzed: 03/10/22 <br />Methyl tert-butyl ether 20.0 5.0 jig/kg 20.0 100 60-140 43 30 A-COM <br />Benzene 19.0 5.0 20.0 95 60-140 16 30 <br />Surrogate: Toluene-d8 29.8 30.0 99 60-140 <br />Matrix Spike (2201760-MS1) Source: 22CO262-01 Prepared: 03/07/22 Analyzed: 03/10/22 <br />Methyl tert-butyl ether 27.7 5.0 jig/kg 20.0 ND 138 60-140 <br />Benzene 20.1 5.0 20.0 ND 101 60-140 <br />Surrogate: Toluene-d8 30.1 30.0 100 60-140 <br />Matrix Spike Dup (2201760-M5D1) Source: 22CO262-01 Prepared: 03/07/22 Analyzed: 03/10/22 <br />Methyl tert-butyl ether 24.3 5.0 jig/kg 20.0 ND 121 60-140 13 30 <br />Benzene 21.6 5.0 20.0 ND 108 60-140 7 30 <br />Surrogate: Toluene-d8 29.7 30.0 99 60-140 <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.colifomialab.com <br />Small Business #2916 I ELAP #1233 I NA1CS #541380 I CA SWRCB ELAP Accreditation/Registration Number 1233