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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX (650) 364 9233 <br /> 404 N Wiget Fane Walnut Creek CA 94598 (510) 988 9600 FAX (510) 988 9673 <br /> _ qW Analytical 819 Stnkcr Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> *MPDS Services Client Project ID Tosco#5886 2701 w March Lane Stockton Sampled Dec 1, 1997 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descript Water Received Dec 2 1997 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Dec 19, 1997 <br /> Attention Jarrel Crider First Sample# 712-0163 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Purgeable Ethyl Total <br /> Humber Description Hydrocarbons Benzene Toluene Benzene Xylenes <br /> µ9/L Ng/L ugly Ng/L pg/L <br /> 712-0163 MW1 ND ND ND ND ND <br /> 712-0164 MW2 ND ND ND ND ND <br /> 712-0165 MW3 ND ND ND ND ND <br /> 712-0166 MW4D ND 051 ND ND ND <br /> 0 712-0167 MW4S ND ND ND ND ND <br /> 712-0168 MWSD ND ND ND ND ND <br /> 712-0169 MWSS ND ND ND ND ND <br /> 712-0170 MW6D ND ND ND ND ND <br /> 712-0171 MW6S ND ND ND ND ND <br /> 712-0172 MW7D ND ND ND ND ND <br /> 712-0173 MW7S ND ND ND ND ND <br /> Detection imi s 50 050 090 050 050 <br /> Total Purgeable Petroleum Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as ND were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL, #1271 <br /> Ognature on File <br /> Alan B Kemp <br /> Project Manager Page 1 of 2 <br /> 7120163 MPD <1> <br />