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GROUND ZERO ANALYSIS, INC <br /> 1714 Main Street <br /> Escalon, CA 95320 <br /> Prot ID 95-013 Blank 1 QC Data Date Analyzed 05/25/01 <br /> Site Knowles Hammer Lane <br /> Method 8015M 18020A <br /> Lab ID Blank <br /> Sample ID BLK80525 <br /> Matnx Water <br /> Total Petroleum Hydrocarbons <50 <br /> @ Gasoline <br /> Benzene <0 5 <br /> Toluene <0 5 <br /> Xylenes <0 5 <br /> Ethyl Benzene <0 5 <br /> QA/QC <br /> Surrogate Spike Recovery 115% <br /> Matrix Spike Recovery Summary <br /> Percent Recovery <br /> Lab ID Client ID Analyte MS 1 MSD %RPD <br /> B05351 BC MW-1 Benzene 123 1 109 12 <br /> Laboratory Control Spike <br /> Lab ID Analyte Percent Recovery <br /> LCS0525C Ethyl Benzene 121 <br /> 'water samples an:reported in ug/L sod and sludge samples in mgtkg <br /> 3037 Fi6 St, Ceres, CA 95307 0 Phone (209) 581-9280 o Fax (209) 581-9282 <br />