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Sherwood <br />' �L Labs 8071 NORTH LANDER AVENUE <br /> P.Q. BOX 997 <br /> HILMAR,CALIFORNIA 95324 <br /> , 01./05/01 QUALITY CONTROL REPORT DHS Cert. #1400 <br /> Total Petroleum Hydrocarbons(TPH) Analysis <br /> ' Client: BLAKELY ENVIRONMENTAL Date Received: 12/29/00 <br /> PO BOX 339 Date Started: 01/03/01 <br /> WRIGHTWOOD,CA 92397 Date Complete: 01/04/01 <br /> ' ATTN: MELANIE SELF <br /> Lab Report #: 110122904 Lab Sample #:PH01.21000-PHO121011 <br /> Linearity Check: <br /> ' BTEX Benzene 0.9994 TPH Gasoline 0.9999 <br /> Toluene 0.9995 TPH Diesel 0.9978 <br /> Ethyl Benz 0.9992 Motor Oil 0.9962 <br /> ' Xylenes 0.9991 TRPH (418.1) N/A <br /> MTBE N/A <br /> ' Std Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 94 95 95 95 <br /> MTPH Gasoline 101 TPH Diesel 102 <br /> TRPH (418.1) N/A Motor Oil 91 <br /> hnt-rix Spike Recoveries MS MSD RPD <br /> MTBE N/A N/A N/A <br /> BTEX Benzene 112 97 14 <br /> Toluene 102 103 1 <br /> Ethyl Benz Spike insignificant r lative to sample conggntration <br /> Xylenes Spike insignificant relative to sample concentration <br /> TPH Gasoline 99 98 1 <br /> TAH Diesel 119 111 7 <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 100 73.1 - 124 <br /> Toluene 98 73.6 120 <br /> Ethyl Benz 98 72.5 - 118 <br />' Xylenes 107 72.7 - 121 <br /> TPH Gasoline 99 82.4 117 <br /> i <br /> TPH Diesel 101 76.5 - 136 <br /> TRPH (418.1) N/A N/A <br /> 7- <br /> Nancy kiedenweg, L4i Did X01 g67-525$ FAX; (209)667-2581 <br />