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Sequoia WO Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)3649233 <br /> 4D 404 N.Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd. North,Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707) 792-0342 <br /> 1551 Industrial Road San Carlos,CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> .;:EMCON /Pinnacle ........ <br /> Client Project 1D: ARCO 2186;Stockton; CA:.: :<:<::>:.::; Sarripled Jiln 17, 1999 <br /> 3939 Cambridge Rd., Ste. 220 Sample Matrix: Soil Received: Jun 17, 1999:::: <br /> -..-.Cameron Park, CA 95682 Analysis Method: EPA 5030/8015 Mod./8020 Reported: Jun 18, 1999':: <br /> `..:Attention: Mark Capps First Sample#: S906308 -01 <br /> X XX <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX/ MTBE <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I.D. I.D. I.D. I.D. I.D. I.D. <br /> S906308-01 S906308-02 S906308-03 S906308-04 S906308-05 S906308-06 <br /> T-3-N(17') T-2-N(17') T-3-S(17') T-2-S(17') T-1-N(17') T-1-S(17') <br /> urges e <br /> Hydrocarbons 1.0 240 11,000 N.D. N.D. 6,100 5,100 <br /> Benzene 0.0050 0.19 N.D. N.D. N.D. N.D. N.D. <br /> Toluene 0.0050 2.2 880 N.D. N.D. N.D. N.D. <br /> Ethyl Benzene 0.0050 1.6 340 N.D. N.D. 18 8.7 <br /> Total Xylenes 0.0050 10 1,900 0.015 0.023 430 300 <br /> MTBE 0.050 12 280 3.5 5.8 31 N.D. <br /> Chromatogram Pattern: Gasoline& Gasoline& -- - Gasoline& Gasoline& <br /> Unidentified Unidentified Unidentified Unidentified <br /> Hydrocarbons Hydrocarbons Hydrocarbons Hydrocarbons <br /> Quality Control Data >C10 C6-C12 >C10 >C10 <br /> Reporting Limit <br /> Multiplication Factor: 25 500 1.0 1.0 500 500 <br /> Date Analyzed: 06/18/99 06/18/99 06/18/99 06/18/99 06/18/99 06/18/99 <br /> Instrument Identification: HP-5 HP-5 HP-5 HP-5 HP-5 HP-5 <br /> Surrogate Recovery, %: 65 60 <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 /> SEQUOIA ANALYTICAL, ELAP# 71 •Diluted Out <br /> i <br /> Ronald W. Bobel <br /> Project Manager/Sacramento Laboratory <br /> S906308.PCP <1> <br />