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41) Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N WEget lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> I,I- Analytical 819 Straker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> MPD$ Services Client project Ib Unocal#6981,4707 Pacific Ave,Stockton Sampled Apr 26-27, 1995 <br /> 2401 Stanwell Dr, Ste 300 Matrix Descript Water Received Apr 27, 1995 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Reported May 12, 1995 <br /> Attention Sarkis Karkarian First Sample# 504-1776 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Sample Sample Purgeable Ethyl Total <br /> Number Description Hydrocarbons Benzene Toluene Benzene Xylenes <br /> µg/L ug/L Ng/L µg/L pg/L <br /> 504-1776 MW1 ND ND 064 ND 075 <br /> 504-1777 MW2 11,000 5,300 460 74 530 <br /> 504-1778 MW3 ND ND 074 ND 11 <br /> 504-1779 MW4 250 24 071 ND 15 <br /> 504-1780 MW5 2,900 650 12 23 16 <br /> 504-1781 MW6 ND ND ND ND ND <br /> 504-1782 MW7 97 24 074 ND 067 <br /> 504-1783 MW8 ND ND ND ND ND <br /> 504-1784 MW9 ND 12 41 ND 33 <br /> 504-1785 MW10 ND ND ND ND ND <br /> Detection imi s so 050 056-- 050— 055 <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 /> INSignature on File <br /> Alan B Kemp <br /> Project Manager <br /> 5041776 MPD <1> <br />