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JAN 04 '99 03 31PM SEQUOIA/SAC P 10 <br /> Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650)36d-9600 FAX(650) 364-9233 <br /> CD <br /> 404 N Wtget lane Walnut Creek,CA 94596 (925)968-9600 FAX(925)988-9673 <br /> Analytical 619 StrikerAvenue,Sulte 8 Sacramento,CA 95934 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North.Ste,D Petaluma,CA 04954 (707)79Z-I96S FAX(707)792-0342 <br /> I <br /> cific Environmental Group-Sac Project Unocal 0123,Tracy,CA Sampled 10/22/98 <br /> 315 Sunrise Gold Circle St M PrviectNurnber 910-017 lA Received 10/22/98 <br /> ncho Cordova,CA 95742 Pro eet Mana cr Mike Mitcheiier Reported 10/30/98 <br /> Diesel Hydrocarbons(C10-C24)by DHS LUFT/QuAlity Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> lAnalyte Analyzed Level Result Result Units Rocov Lirruts % Limit % Notcas <br /> jlgtch. 8100281 ]fie Prepared, 9S ylop-Mc%hod. EPA 3510E <br /> Rlaak <br /> Extractable H drocarbons 10/26/98 ND til 0 0500 <br /> Surrogate Penracosane 1P00400 00394 500-1.50 983 <br /> LCS �;(p$2S1.BS1 <br /> Extractable Hydrocarbons 10/26/98 100 0 832 mg/l 60 0-140 $3 2 <br /> Surrogate Pentacosane " 00400 00398 500-150 .995 <br /> LC&DUR A100281—RSD1 <br /> Extractable Hydrocarbons 10/26/98 _ 100 <br /> 0 860 mg/l 60 0-i40 86 0 50 0 3 31 <br /> Surrogate Pentacosane 00400 00408 500-150 102 <br /> • <br /> equoia Analytical-Sacramento *Refer to end of report for taxi of notes and definalo-ns <br /> Linda C Schneidcr,Laboratory Director Page 8 of 12 <br />