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Environmental Laboratories <br /> Working To Restore Nature <br /> QUALM ASSURANCE/QUALITY CONTROL REPORT <br /> 10201ab.frm <br /> Attention: Mr. Greg Stahl Date Analyzed: 12-11-92 <br /> RESNA G.C. #: 1 <br /> 1710 Main St. Matrix: Water <br /> Escalon, CA 95320 <br /> Project: 19509L, Project W0365.01 <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes TPHg TPHd <br /> Wb ppb j?pb Nb -Rpb ppb <br /> Detection Limit: 0.5 0.5 0.5 0.5 50 50 <br /> Blank ND ND ND ND NR ND <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes TPHg TPHd <br /> :i % % % % % % <br /> Standard 93 89 92 89 NR 105 <br /> MS 113 101 104 82 NR 105 <br /> MSD 110 99 101 83 NR 119 <br /> RPD 2.69 2.00 2.93 1.21 NR 12.5 <br /> ppb = parts per billion = ug/L = micrograms per liter. <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 /> Acceptable Ranae <br /> Standard 85-115% <br /> Blank ND <br /> MS/MSD 70-130% <br /> RPD ¢25% <br /> Irl _December 28, 1992 <br /> Laboratory Re sentative Date Reported <br /> RFSNA ENWRONNOWrAL LABORATORY 1S CERTIFIED BY THE STATE OF CALIFORNIA <br /> DEPARTMENT OF HEALTH SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY <br /> (Certification No. 1211) <br /> 42501 Albrae Street • Fremont, CA 94538 • Phone: (510) 623-0775 • (800) 247-5223 • FAX: (510) 651-8754 <br />