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Sherwood <br /> 1 Labs 8071 NORTH LANDER AVENUE <br /> C O R P O R A T I O N P.O. BOX 937 <br />' HILMAR, CALIFORNIA 95324 <br /> 05/04/01 QUALITY CONTROL REPORT DHS Cert. #1400 <br />' Total Petroleum Hydrocarbons(TPH) Analysis <br /> Client: BLAKELY ENVIRONMENTAL Date Received: 04/30/01 <br /> PO BOX 339 Date Started: 05/01/01 <br /> WRIGHTWOOD,CA 92397 Date Complete: 05/04/01 <br />' ATTN: MELANIE SELF <br /> Lab Repor H104302, Lab Sample #:PH1041430-PH1041437 <br /> Linearity Check: <br />' BTEX Benzene 0.9995 TPH Gasoline 0.9997 <br /> Toluene 0.9985 TPH Diesel 0.9998 <br /> Ethyl Benz 0.9997 Motor Oil 0.9998 <br />' Xylenes 0.9988 TRPH (418.1) N/A <br /> MTBE N/A <br />' std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 100 96 102 108 <br /> TPH Gasoline 98 TPH Diesel 105 <br />' TRPH (418.1) N/A Motor 0i1 105 <br /> Matrix Spike Recoveries MS MSD RPD <br />' MTBE N/A N/A N/A <br /> BTEX Benzene 103 104 1 <br /> Toluene 100 103 3 <br />' Ethyl Benz 104 102 2 <br /> Xylenes 102 101 1 <br />' TPH Gasoline 95 99 4 <br /> TPH Diesel 96 97 1 <br />' Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A <.3 ug/L <.3 ug/L <.3 ug/L <.3 ug/L <br /> TPH Gasoline <50 ug/L Diesel/MO <50 ug/L TRPH(418.1) N/A <br />' Lab Control sample % Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 88 73.1 - 124 <br />' Toluene 90 73.6 - 120 <br /> Ethyl Benz 93 72.5 - 118 <br /> Xylenes 100 72.7 - 121 <br />' TPH Gasoline 97 82.4 - 117 <br /> . TPH Diesel 96 75.8 - 1.24 <br />' TRPH (418.1) N/A N/A <br /> N cy B�denweg, Lab ire�or <br /> OFFICE:(209)667-5258 FAX: (209)667-2581 <br />