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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenueit <br /> Sue 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Iwo <br /> QPDS Services Client Project ID Unocal#5098,5606 Pacific Ave,Stockton Sampled Dec 19, 1995 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descript Water Received Dec 19, 1995 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Jan 12, 1996 <br /> Attention Jarrel Crider Flrst Sample# 512-2228 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Purgeable Ethyl Total <br /> Number Description Hydrocarbons Benzene Toluene Benzene Xylenes <br /> pg/L lug/L pg/L erg/L Mg/L <br /> 512-2228 MW-10 ND ND ND ND ND <br /> 512-2229 MW-11 32,000 6,500 2,400 920 4,100 <br /> 512-2230 MW-12 8,600 830 23 420 280 <br /> 512-2231 MW-13 ND ND ND ND ND <br /> • 512-2232 MW-14 ND ND ND ND ND <br /> 512-2233 MW-15 ND 083 22 ND 25 <br /> 512-2234 MW-16 1,400 150 ND 16 ND <br /> 512-2235 MW-17 ND 13 ND ND 093 <br /> 512-2236 ES1 ND ND ND ND ND <br /> 512-2237 ES2 ND ND ND ND ND <br /> 512-2238 ES3 ND ND ND ND ND <br /> e ec ion Limits so 060 050 0 su 0 SO <br /> Total Purgeable Petroleum Hydrocarbons are quantitated against afresh 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 /> 5122228 MPD <1> <br />