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1 <br /> Sequoia 680 C eake Drive Redwood City 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 /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> �III� Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br />_= A7C Associates, Inc - - Client Pro' ID _Bozzano Propertyµ - ~ _ Sampled 06/18/98 <br />„ 1260 Graphics Drive Sample Descript BP-SB2-25 5 Received 06/19/98 <br /> Modesto, CA 95351-1502 Matnx SOLID Extracted 06/25/98 <br /> Analysis Method 8015Mod/8020 Analyzed 06/26/98 <br /> _Attention Tom Lutterman Lab Number 9806E06-09 Reported 07f30198 ; <br /> QC Batch Number GC062598BTEXEXA <br /> Instrument ID GCHP18 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) With BTEX <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 500 5300 <br /> Benzene 2 5 N D <br /> Toluene 2.5 56 <br /> Ethyl Benzene 2 5 58 <br /> Xylenes (Total) 2.5 370 <br /> Chromatogram Pattern <br /> Weathered Gas C6-C12 <br /> Surrogates Control Limits% % Recovery <br /> Trlfluoratoluene 70 130 102 <br /> 4-Bromofluorobenzene 60 140 50 <br /> • <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Prolec Manager Page 22 <br />