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terra <br />Environmental <br />Services <br />Analysis Certificate of Analys s <br />California Department of Health Services Certificate #1769 <br />On Thursday, January 19, 1995, Quanterra Environmental Services Mobile Laboratory <br />#102 received soil samples for analysis of volatile organics and total petroleum <br />hydrocarbons. The samples were analyzed using EPA method 8020 and modified EPA <br />method 8015. <br />Volatile Organics <br />The samples were analyzed for volatile organics (benzene, toluene, ethylbenzene, and <br />total xylenes) by EPA methods 5030/8020: purge and trap extraction followed by gas <br />chromatography/ photoionization detection. <br />No problems were encountered with the analyses. <br />Total Extractable Petroleum Hydrocarbons, Diesel Range <br />The samples were analyzed for total extractable petroleum hydrocarbons (diesel) by <br />modified EPA method 3550/8015: ultrasonic extraction followed by gas <br />chromatography/ flame ionization detection. <br />No problems were encountered with the analyses. <br />