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EXCELCHEM <br /> ENVIRONMENTAL LABS <br /> 500 Giuseppe Court, Suite 9 0 <br /> Roseville, CA 95678 <br /> Phone# (916) 773-3664 Fax# (916) 773-4784 <br /> OA/QC REPORT <br /> Attention Mr Alan Klein BTEX Analyzed 08-28-96 <br /> FUGRO-WEST, INC Matrix Water <br /> 1050 Melody Lane, Suite 160 <br /> Roseville, CA 95678 <br /> Project 9647-0771/Lopez Prop <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes <br /> PPB PPB PPB PPB <br /> Reporting Limit 0 5 0 5 0 5 0 5 <br />• QA/QC PARAMETER <br /> Matnx BIank ND ND ND ND <br /> PERCENT RECOVERIES <br /> Matrix Spike 105% 106% 105% 106% <br /> Matrix Spike 105% 106% 104% 106% <br /> Duplicate <br /> ppb-parts per billion=ug/L=microgram per Itter <br /> ND =Not detected Compound(s)may be present at-oncentrattons below the reporting hm1L <br /> All surrogate recoveries were wither 30%of targe:values. <br /> Spikes&Spike Duplicates were each spdced with 2.50 ng BTE.\standard <br /> ANALYTICAL PROCEDURES <br /> BTE\—Benzene,toluene,ethylbenzene and total\�acne[Somers(BTE`i)are measured by extraction using EPA Method 5030 followed by analysts <br /> using EPA Method 602 which utilizes a gas chromatograph(GC)equipped with a phatolomzation&lector(PID) <br /> 09-04-96 <br /> abo tory Representative Date Reported <br /> L\CELCHEV ENN—RONMENTAL LABS IS CERTIFIED BY THE STATE OF CALIFORNIA <br /> DEPARTMENT OF HI;tiLTH SERVICE AS A HAZARDOUS WASTE TETING LABORATORY <br /> (Certification Nm 1760) <br />