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Sequoia 680 Chesapeake Drive Redwood Gry CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Iwo- Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North,Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)797-0342 <br /> *Ier-Ryan'-Dublin Client project I0 Unocal Circle K 1 0{ Sampled Jan 25, 1999 <br /> 6747 Sierra Court, Surte J Sample Matrix Water [ I; {, R'9ceived Jan 25, 1999 <br /> Dublin, CA 94568 Analysis Method EPA 5030/8015 0 /8020 Reported Feb 9, 1999 <br /> Attention Deanna Harding First Sample# 901-1723 <br /> FEP 1 ° <br /> TOTAL PURGEABLE PETROLEUM HYDROCA LMktA-B;TF„X / MTBE <br /> Reporting Sample SampleirlpleA� CSamIle' 'sample <br /> Analyte Limit I D I D I D i D. I.D <br /> pg/L 901-1723 901-1724 901-1725 901-1726 901-1727 <br /> TB-LB MW-1 MW-2 MW-3 MW-4 <br /> Purgeable <br /> Hydrocarbons 50 N D 40,000 28,000 6,100 1,300 <br /> Benzene 050 N D 320 270 28 10 <br /> Toluene 0 50 N D 1,800 410 N D N D <br /> Ethyl Benzene 050 N D 2,500 2,400 220 30 <br /> 100tal Xylenes 0 50 N D 12,000 6,300 190 29 <br /> MTBE 25 N D 22,000 79,000 N D N D <br /> Chromatogram Pattern -- Gasoline Gasoline& Gasoline Gasoline <br /> Unidentified <br /> Hydrocarbons <br /> C6-C12 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 200 200 20 10 <br /> Date Analyzed 2/2/99 2/3/99 2/2/99 2/2/99 2/2/99 <br /> Instrument Identification HP-9 HP-9 HP-9 HP-9 HP-9 <br /> Surrogate Recovery, % 93 92 99 88 97 <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 /> 12c000IA ANALYTICAL, #1271 <br /> IlVianne Fegley <br /> Project Manager <br /> 9011723 GET a 1> <br />