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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 /> IP <br /> QA/0C REPORT <br />' Attention Mr John Bower BTEX Analyzed 07-18-96 <br /> SECOR Matrix Sod <br />' 1734 34th Street <br /> Sacramento, CA 95816 <br />' Project JoT10-002-01 <br /> Ethyl- Total <br />' Benzene Toluene benzene Xylenes <br /> PPM PPM PPM PPM <br /> Reporting Lieut 0 005 0 005 0 005 0 005 <br /> QA/QC PARAMETER <br /> IMatrix Blank ND ND ND ND <br />' PERCENT RECOVERIES <br /> Laboratory Control Spike 99% 1000/0 1000/0 101% <br />' Laboratory Control Spike 96% 98% 98% 990/0 <br /> Du hcate <br /> Ppm=parts per nullton=mg(Kg—nulllgrarn per kilogram <br /> ND =Not detxtcd Canpound(s)may be present at concentrations below the reporting luruL <br /> All surrogate recoveries were within 30%of target values. <br /> Spikes&Spike Duplicates were each spiked with 250 ng BTEX standard <br /> ANALYTICAL PROCEDURES <br /> BTEX—Benzene,toluene ethylbenzene,and total xylene isomers(BTEX)are measured by extraction using EPA Method 5030 followed by analysts <br /> using EPA Method 8020 which utilizes a gas chromatograph(GC)equipped with a photwomzatron detector(PID) <br /> I07-25-96 <br /> Lab ratory Representative Date Reported <br /> IEXCELCHEM ENVIRONMENTAL LABS IS CERTIFIED BY THE STATEOF CALIFORNIA <br /> DEPARTMENT OF HEALTH SERVICES ASA HAZARDOUS WASTETEMNG LABORATORY <br /> (Certtfwatwn Na 1760 2119) <br />