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6 <br /> PRECISION <br /> a. ENVIRD—TELL <br /> Analytical Laboratory <br /> CERTIFICATE OFAN,4mis <br /> Friday,April4, 2008 <br /> Attention: Guy W.Roy <br /> R&L Diesel <br /> P.O.Box 2498 Report Page 40 of 41 <br /> Danville, CA 94526 <br /> Total Petroleum Hyd.5rocarbons-Diesel Range-Quality Control <br /> Precision Enviro- ech <br /> i <br /> AnaIyte Reporting Spike Source %REC RPD <br /> Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch ACS1113-Solvent Extraction <br /> i <br /> Blank(AC81113-BLK]) <br /> Prepared&Analyzed: !1-Mar-08 <br /> TPH-Diesel ND 1.00 mglkg <br /> LCS(AC81113-BS1) Prepared&Analyzed: I1-Mar-08 <br /> TPH-Diesel 4790 1.00 mg/kg 50i 0 <br /> 96 75-125 <br /> LCS Dup(AC81113-BSD1) Prepared&Analyzed: 11-Mar-08 <br /> TPH Diesel 4990 <br /> 1.00 mg/kg 50 0 100 75-125 4 20 <br /> fl <br /> 1 <br /> 1 <br /> mg/L=milligrams per Lifer=ppm DLR=Detection Limit for Purpose of Reporting. <br /> WIL.=micrograms per Liter=ppb Exceptional sample matrices or interferences may <br /> mule in higher detection limits. <br /> RESPECTFULLY SUBMITTED, <br /> C—j/'OL'Z� <br /> Jonathan Le,Laboratory Director <br /> 3935 X Coronado Ave Stockton CA. 95204 phone: (209) 4774105 Fax: (209) 546-749 7 <br />