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r Sequoia 630 Chesapeake Drive Redwood City,CA 94063 (415) 364.9600 FAX(413) 364.9231 Analytical 1904 Sates Avenue,Suite L Concord,CA 94320 (310) 646.9600 FAX(510)636.9639 319 Striker Avenue,Suite 3 Sacramento,G 9S334 (916) 921.9600 FAX(916)921.0100 Alton Geosclence Client Project ID: Mobil 04 J 3f3-0133-15 Sampled: May 2, 1994 30-A Undberyh Ave. Sample Matrix: Water Received: May 4.8, 1994 Livermore,CA 94550 Analysis Method: EPA 5030/8015/8020 Reported: May 11, 1994 Attention: Kevin Keenan First Sample #: 405-0255 S:,j';;2;ii.'<$.2\\i`-.... \':;% L•.<Lx.r �r.;..•.;;f.: •u.;.�x;.:•.k:. "e*z a,;,,;.,:...:.,y.:. ....,..//.:......,./////./:..\...lki>i$i////In,.:4. \\\\\\.. x::. ,:., :•r..;Ar;'>':.:<;;;,r+c-. .,:an„•e;:.`:^vr;4. ..:;a;o-o-:.•� , :c�>., i+.•�,•.::.»:..�xa•: .. �. .n\\\\\,c..+a.,. PF//7fi...,......\\\\\\r.'r',s8:.\,•:fJ/f/,,..\.:o:..:::�::..;1/ry TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION Reporting Sample Sample Sample Sample Sample Sample Analyte Limit I.D. I.D. I.D. I.D. I.D. I.D. N9/L 405-0255 405-0256 405-0257 405-0258 405-0259 405-0260 AW-4 AW-2 AW-1 AW-11 AW-9 AW-12 Purgeable j Hydrocarbons 50 N.D. N.D. N.D. N.D. N.D. N.D. i I Benzene 0.5 N.D. N.D. N.D. N.D. N.D. N.D. Toluene 0.5 N.D. N.D. N.D. N.D. N.D. N.D. Ethyl Benzene 0.5 N.D. N.D. N.D. N.D. N.D. N.D. Total Xylenes 0.5 N.D. N.D. N.D. N.D. N.D. N.D. _. Chromatogram Pattern: 6 X994 Quality control Data - Report Limit Multiplication Factor: 1.0 1.0 1.0 1 O'r'" 1,p-rr_-- 10 Date Analyzed: 5/10/94 5/10/94 5/10/94 5/10/94 5/10/94 5/10/94 Instrument Identffication: HP-4 HP-4 HP-4 HP-4 HP-4 HP-4 Surrogate Recovery,96: 94 99 100 95 97 93 (OC Limits = 70-130%) Furgeable Hydrocarbons we quantitated against a fresh gasoline standard. Analytes reported as N.D.were not detected above the stated reporting limit. SEQUOI ICAL,#1271 7roren L Enstrom ject Manager 405025&&T <U,