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` Sequoia 1455 McDowell Blvd North Ste D <br /> Petaluma CA 94954 <br /> (707) 792-1865 <br /> Analytical <br /> FAX(707) 792-0342 <br /> • <br /> ATC Associates,Inc Project Ripon USD <br /> Sampled 7/15/99 <br /> 1117 Lone Palm Ave,Suite B Project Number 13099 0001 Received 7/20/99 <br /> ' Modesto,CA 95351 Project Manager Drew Van Allen Reported 8/6/99 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M1802ONVQuality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Ltnvts % Linut % Notes* <br /> ' Batch 9070408 Date Prepared 7/21/99 Extraction Method EPA 5030 soils <br /> Blank 9070408-BLK 1 <br /> Gasoline 7/21/99 <br /> Benzene ND ug/kg 400 <br /> Toluene ND 200 <br /> �� ND 200 <br /> Ethylbenzene ND 2 00 <br /> Xylenes(total) ND 400 <br /> Surrogate a a a-Triuorotoluene 300 298 650-135 993 <br /> Surrogate 4-Bromofluorobenzene 300 300 650-135 100 <br /> ' Blank 9070408-BLK2 <br /> Gasoline 7/23/99 <br /> Benzene ND uPg 400 <br /> Toluene 2 00 <br /> ND 2 00 <br /> ]benzene ND 200 <br /> 1wenes(total) ND <br /> 4 00 <br /> Surrogate a a,a-Tnfluorotoluene 300 318 650-135 106 <br /> Surrogate 4-Bromofluorobenzene 300 282 650-135 940 <br /> LCS 9070408-BS2 <br /> Gasoline 7/23/99 2000 2080 ug/kg 650-135 104 <br />' Surrogate 4-Bromofluorobenzene 1. 300 284 650-135 94 7 <br /> Matrix Spike 9070408-MSI P907317-01 <br />' Gasoline 7/21/99 2000 ND 1660 ug/kg 650-135 83 0 <br /> Surrogate 4-Bromofluorobenzene Of 300 139 If 650-135 79 7 <br /> _Matrix Spike Du p 9070408-MSD1 P9073I7-01 <br />' Gasoline 7/21/99 2000 ND 1720 ug/kg 650-135 860 200 3 55 <br /> Surrogate 4-Bromofluorobenzene 300 201 650-135 47-0 <br /> 1 <br /> Sequoia Analytical-Petaluma <br /> Refer to end of report for text of notes and definitions <br />' Page 6 of 9 <br />