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I <br /> )l Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> PO BOX 937 <br /> C O F? P 0 R A T I 0 N <br /> HlLMAR CALIFORNIA 95324 <br />' 07/27/2000 QUALITY CONTROL REPORT DHS Certification#1400 <br /> Total Petroleum Hydrocarbons(TPH)Analysis Nancy Biedenweg, Lab Director <br />' Client. Geo-Phase Environmental, Inc. Date Received 07/24/2000 <br /> 2937 Veneman #8240 Date Started 0712=000 <br />' Modesto, CA 95356 Date Complete 0712712000 <br /> Attn Stephen Lankford <br /> Lab-Report 1k H0072405 Lab Sample#s PH0070779-PH0070785 <br />' <br /> Linearity Check <br /> BTEX Benzene 09984 TPH Gasoline 0.9998 <br /> Toluene 09978 TPH Diesel NIA <br />' Ethyl Benz 09997 Motor Oil NIA <br /> Xylenes 09996 TRPH (4181) NIA <br />' MTBE NIA <br /> Std %Re eatabil Ity MTBE Benzene Toluene Eth Benz Xylenes <br />' BTEX NIA 93 104 92 96 <br /> TPH Gasoline 95 TPH Diesel NIA <br /> TRPH (418 1) NIA TPH Motor Oil NIA <br /> matrix Spike Recev <br /> en MS MSD RPD <br /> MTBE NIA NIA ERR <br /> BTEX Benzene 107 110 28 <br /> Toluene 106 112 36 <br /> Ethyl Benzen 110 105 47 <br />' Xylenes 105 99 59 <br /> TPH Gasoline 95 96 10 <br />' TPH Diesel NIA NIA ERR <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br />' BTEX NIA c 3 <3 <3 <3 <br /> TPH Gasoline X50 TPH DieseVMO N/A TRPH(418 1) N/A <br />' Lab Control Sample% Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 100 731 - 124 <br />' Toluene 103 736 - 120 <br /> Ethyl Benz 102 725 - 118 <br /> Xylenes 97 727 - 121 <br /> TPH Gasoline 95 82.4 - 117 <br /> TPH Diesel NIA NIA - NIA <br />' TRPH (4481) NIA NIA <br /> OFFICE (209)667-5258 FAX (209)667-2581 <br /> 1 <br />