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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 94.598 (510) 988 9600 FAX(510)988 %73 <br /> Analytical 819 Str.ker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> is <br /> MPDS Services Client Project ID Unocal#5098,5606 Pacific Ave,Stockton Sampled Sep 19, 1995 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descript Water Received Sep 19, 1995 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015 Mod /8020 Reported Oct 5, 1995 <br /> Attention Sarkis Karkarian First Sample # 509-1615 <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 Ng/L Ing/L pg/L Fig/L <br /> 509-1615 MW-10 ND ND 085 ND ND <br /> 509-1616 MW-11 53,000 8,700 9,500 940 6,800 <br /> 509-1617 MW-12 10,000 620 160 270 640 <br /> 509-1618 MW-13 ND ND ND ND ND <br /> 509-1619 MW-14 ND ND ND ND ND <br /> 509-1620 MW-15 ND ND ND ND ND <br /> 509-1621 ES1 ND ND ND ND ND <br /> 509-1622 ES2 ND ND ND ND ND <br /> 509-1623 ES3 ND ND ND ND ND <br /> Detection Limits 50 050 050 050 050 <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 /> Signature on File <br /> Alan B Kemp <br /> Project Manager <br /> 5091615 MPD <1? <br />