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r <br /> 1 <br /> EXCELCHEM <br /> ENVIRONMENTAL LABS <br /> 500 Giuseppe Court, Suite 9 e <br /> Roseville, CA 95678 <br /> Phone#- (916) 773-3664 Fax# (916) 773-4784 <br /> —QA/QC REPORT <br /> Attention Mr Alan Klein Date Analyzed 11-27-96 <br /> Fugro West Matrix Water <br /> 1050 Melody Ln 9160 <br /> Roseville, CA 95678 <br /> Project 9647-0771/Lopez Property <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes <br /> PPB PPB PPB PPB <br /> Repo!—haRepo!-qa Lirmt 05 05 05 05 <br /> QA/QC PARAMETER <br />. Matrix Blank ND ND ND ND <br /> PERCENT RECOVERIES <br /> Matrix Spike 93% 94% 92% 93% <br /> Matrix Spike 91% 90% 89% 90% <br /> Duplicate <br /> ppb=parts per billion=ug/L-nucrogram per liter <br /> ND Not detected Compound(s)may be present at concentration below the reporting Imut <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 /> BTEC—Benzene toluene ethyibenzene,and Mal xylene Isomers(STEX)are measured by extraction using EPA Method 5030 followed by analvsls <br /> using EPA Method 602 which uLthms a gas chromatograph(GC)equipped with a photolonlzatton detector(PID) <br /> 12-05-96 <br /> (LTratoiryfepresentative Date Reported <br /> EXCELCHEM ENVIRONMENTAL LABS t5 CERTIFIED B)THE SPATE OF CALIFORNIA <br /> DEPARTMENT OF HEALTH SERVICES AS A HA7ARDOUS WASTE TESTING LABORATORY <br /> ,Certl&&L on Na 17601 <br /> 2 <br />