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i <br /> Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> C O R P O R A T 1 0 N P.O. BOX 937 <br /> HILMAR, CALIFORNIA 95324 <br /> 04109198 QUALITY CONTROL REPORT DHS Certification#1400 <br /> Volatile Analyses Nancy Biedenweg, Lab Director <br /> Client DEL-TECH Date Received: 04102198 <br /> 10624 OLIVE AVE Date Started: : 04107198 <br /> OAKDALE, CA 95361 Date Complete: 04109/98 <br /> ATTN: DON LIGHT - <br /> Lab Re ort#: H8040202 Lab Sample#fs: PHON0042-48 <br /> Lineari Check: <br /> BTEX Benzene 0.9998 TPH Gasoline 0.9998 <br /> Toluene 0.9994 TPH Diesel NIA <br /> Ethyl Benzene 0.9992 Motor Oil NIA <br /> Xylenes 0.9996 TRPH (418.1) NIA <br /> MTBE NIA <br /> Std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX NIA 110 105 114 98 <br /> TPH Gasoline 99 TPH Diesel NIA <br /> TRPH (418.1) NIA TPH Motor Oil NIA <br /> Matrix spike Recoveries MS MSD RPD <br /> MTBE NIA NIA ERR <br /> BTEX Benzene 99.0 100.0 1.0 <br /> Toluene 95.0 91.0 4.3 <br /> Ethyl Benzene Spike Insignificant relative to sample concentration ERR <br /> Xylenes Spike insignificant relative to sample concentration ERR <br /> I <br /> TPH Gasoline 91 90 1.1 <br /> TPH Diesel WA N/A ERR <br /> N/A <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX NIA <.3 <.3 ug/i,� <.3 <.3 <br /> TPH Gasoline <50 ug/1--TPH DleseI1M0 NIA TRPH(418.1) NIA <br /> Lab Control Sample%Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 95 74.6 - 126.0 <br /> Toluene 91 70.7 - 118.0 <br /> Ethyl Benz 91 70.8 - 119.0 <br /> Xylenes 92 74.6 - 116.0 <br /> TPH Gasoline 88 - 67.9 - 150.0 <br /> TPH Diesel NIA 41.1 - 121.0 <br /> TRPH (418.1) NIA NIA <br /> OFFICE: 209 <br /> ( ) 667-5256 . FAX: 209 667 <br /> FAX: (209) 2581 BBS: (209) 667-4119 <br />