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Environmental Laboratories_ <br /> Working To Restore Nature <br /> UALM( ASSURANCE UALM CONTROL REPORT <br /> 10201ab fret <br /> Attention: Mr Bill Channell Date Analyzed. 09-21-92 <br /> RESNA G.C. # 2 <br /> 1710 Maui St. Matnx Water <br /> Escalon, CA 95320 <br /> Project: 19509L, Project W0321 <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes TPHg TPHd <br /> DDb .Pb Wb 12pb ppb <br /> Detection L1mit 0.5 0.5 05 05 50 50 <br /> Blank ND ND ND ND ND NR <br /> Ethyl- Total <br /> Benzene Toluene benzene Xylenes TPHg TPHd <br /> % % % % % % <br /> Standard 98 95 97 96 92 NR <br /> MS 94 92 96 92 90 NR <br /> MSD 95 93 95 89 89 NR <br /> RPD 106 108 105 331 112 NR <br /> ppb = parts per billion = ug/L = micrograms per Ester <br /> ND = Not detected Compound(s) may be present at concentrations below the detection limit <br /> NR = Analysts not requested <br /> MS = Matrix Spike <br /> MSD = Matrix Spike Duplicate <br /> RPD = Relative Percent Difference <br /> Acceptable Rance <br /> Standard 85-115% <br /> Blank ND <br /> MS/MSD 70-130% <br /> RPD <25% <br /> September 25, 1992 <br /> Laboratory Rep sentattve Date Reported <br /> RESNA E 4VIRONP41NTAL LABORATORY IS CERTIFIED BY THE STATE OF CALIFORNIA <br /> DEPARTMENT OF HEALTH SERVICES AS A HAZARDOUS WASTE TESI7NG LABORATORY <br /> (Certification No 1211) <br /> 425fst Stree* g Fre-norr CA 915138 9 Phone (510) 623-0775 a (800) 247-5223 • FAX (510) 651-8754 <br />