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680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (9Z5)988-9600 FAX(925)988-9673 <br /> X117 Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921 OtOO <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707) 792-1865 FAX 707 792 0342 <br />' ATC Associates,Inc Project Ripon USD Sampled 2/5199 <br /> 1117 Lone Palm Ave, Suite B Project Number 13099 0001 Received 2/10/99 <br /> 1 Modesto,CA 95351 Project Manager Drew Van Allen Reported 2/25/99 <br /> Total Petroleum Hydrocarbons as Diesel&others by EPA 8015M/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9020424 Date Prepared 2118/99 Extraction Method EPA 3510E <br /> Blank 9020424-BLK1 <br /> Diesel 2/23/99 ND mg/1 00500 <br />' Surrogate o-Terphenyl 11 0 100 00734 73 4 <br /> LCS 9020424-BSI <br /> Diesel 2123199 1 00 0 831 mg/1 28 0-138 83 1 <br />' Surrogate o-Terphenyl " 0 100 00887 88 7 <br /> LCS Dup 4020424-13S131 <br /> Diesel 2123199 1 00 0 795 mg/I 280-138 795 443 <br /> ' Surrogate o-Terphenyl " 0 100 00853 853 <br /> P <br /> 1 <br /> 1 <br /> ' Sequoia Analytical-Petaluma *Refer to end of report for text of notes and definitions <br /> Page 6 of 9 <br /> r <br />