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Environmental Laboratories <br /> . Working to Restore Nature <br /> 42501 Albrae Street <br /> Fremont CA 94538 <br /> Phone (510)621-0775 <br /> (800)247-5223 <br /> FAX (510)651-8754 <br /> 01 ALITY ASSURANCE.IQUALITY CONTROL REPORT <br /> 10201ab frm <br /> Attention Ms Tina LePage Date Analyzed- 02-21-92 <br /> RESNA G C. #: 2 <br /> 1710 Main St Matrix. Water <br /> Escalon, CA 95320 <br /> Project- AGS 195094,W0475 <br /> Weber Point <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes TPHg TPHd <br /> pah Wb ppb Pj2h ppb P� <br /> Detection Limit. 05 0.5 0.5 0 5 50 100 <br /> Blank ND ND ND ND ND NR <br /> Ethyl- Total <br /> Benzene To➢uene benzene Xylenes TPHg TPi Hdl <br /> Standard 101 103 102 104 106 NR <br /> MS 101 98 97 90 106 NR <br /> MSD 104 100 98 90 112 NR <br /> RPD 29 20 10 0 5.5 NR <br /> ppb = parts per billion = ug/L - micrograms per Mer <br /> ND = Not detected Compound(s)may be present at concentrations below the detection limit <br /> NR = Analysis not requested <br /> MS = Matrix Spike <br /> MSD - Matrix Spike Duplicate <br /> RPD = Relative Percent Difference <br /> &citable Range <br /> Standard 85-115% <br /> Blank ND <br /> MS/MSD 70-130% <br /> RPD <25% <br /> February 26, 1992 <br /> Laboratory Representative Date Reported <br /> RESNA ENVIRONMENTAL LABORATORY IS CERTIFIED BY THE STATE OF CALIFORNIA <br /> DEPARTMENT OF HEALTH SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY <br /> (Certification No 1211) <br />