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i <br /> 9' <br /> Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> Analytical 1900 Bates Avenue,Suite L Concord CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> 1*PDS Services Client Project Its Unocal#5421,7303 Pacific Ave,Stockton Sampled Jun 7, 1994 <br /> 2401 Stanwell Dr, Ste 400 Sample Matrix Water Received Jun 7, 1994 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Reported Jun 21, 1994 <br /> Attention Avo Avedessian First Sample# 406-0357 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I D I D LD I D I.D. I D <br /> Ng/L 406-0357 406-0358 406-0359 406-0360 4060360A 40603606 <br /> MW1 MW2 MW3 MW4 MW4* MW4** <br /> Reshot <br /> Purgeable <br /> Hydrocarbons 50 N D N D N D 140 230 N D <br /> Benzene 05 N D N D N D 13 2 0 N D <br /> Toluene 05 N D 069 N D 27 15 0 60 <br /> Ethyl Benzene 0 5 N D N D N D 29 2 7 N D <br /> • Total Xylenes 05 N D 10 N D 15 16 09 <br /> Chromatogram Pattern -- -- -- Gasoline Gasoline <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 1 0 1 0 1 0 1 0 <br /> Date Analyzed 6/17/94 6/17/94 6/16/94 6/16/94 7/8/94 7/8/94 <br /> Instrument Identification HP-2 HP-2 HP-5 HP-5 HP-2 HP-4 <br /> Surrogate Recovery, % 99 98 97 106 99 94 <br /> (QC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> i <br /> SEQUOIA ANALYTICAL, #1271 Please Note <br /> *This result is from a reshot of the same VOA vial that was originally used for quantitation <br /> **This result is from the second of the two VOA vials from this site sampled 6/7/94 and identified as MW4 <br /> This sample had zero headspsce at the time of analysis <br /> A K Revised report,7/11/94 <br /> ect M a er <br /> 4060357 MPD <1> <br />