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j <br /> Environmental Labs <br /> 4946 Watt Avenue, #38 >•� <br /> North Highlands, CA 95660 <br /> (916)334-8661 <br /> OAIQC REPORT <br /> Attention Mr Dave Diem MBTEX Analyzed 07-12-94 <br /> ' GEOCON <br /> 11333 Sunco Drive, Suite 100 <br /> Rancho Cordova, CA 95742 <br /> ' Project # 58080-06-01 Matrix Water <br />' Ethyl- Total <br /> M 1 BE Benzene Toluene benzene Xylenes <br /> PPB PPB PPB PPB PPB <br />' Reporting Limit- 10 0.5 05 05 50 <br />' QA/QC PARAMETER <br /> Matrix Blank ND ND ND ND ND <br />' PERCENT RECOVERIES <br />' Matrix Spike 95% 94% 97% 94% 93% <br /> Matrix Spike 92% 97% 98% 98% 97% <br />' Duplicate <br /> ' ppb = parts per billion = ug/L = microgram per liter <br /> ND = Not detected Compound(s) may be present at concentrations below the reporting limit <br /> All surrogate recoveries were wtthtn 30%of target values. <br /> ' Spites dl:Spike 11upheates were each spiked anth 150 ng AI7x standard <br /> ANALYI'ICJU,PROCIOURES <br /> MSIEX-MII3F,Benzene,toluene,ethylben7ene,and total xylene isomers(tTI'FX)are measured by extraction using EIA Method 5030 <br /> ' followed by analysis using EPA Method 602 which utilizes a gas chromatograph(GC)equipped with a photojonizatton detector(PID) <br /> 7-12-94 <br /> b ratory Re esentative Date Reported <br /> EXCELCHEM ENVIRONMENTAL,LABS IS CFRIII IED BY'n]E SPATE OF CALIFORNIA <br /> DEPARTMENT OF III-A1 I If SERVICES AS A IIA7.ARDOUS WASTE TESTING LABORATORY <br /> ' (Certification No 1760) <br />