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Sequoia 1455 McDowell Blvd North Ste D <br /> Petaluma CA 94954 <br /> (707) 792-0865 <br /> Analytical <br /> FAX(707) 792-0342 <br /> ATC Associates,Inc Project SUSD/Franklin High School Sampled 2124/99 <br /> 1117 Lone Palm Ave,Suite B Project Number na Received 3/1/99 <br /> Modesto,CA 95351 Project Manager Tom Lutterman Reported 3/15/99 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M/Quality Control <br /> Sequoia Analytical-Petaluma <br />' Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> lAnalyte Analyzed Level Result Result Units Recov Linuts % Limit % Notes* <br /> Batch 9020581 Date Prepared 315/99 Extraction Method EPA 5030 soils McOH <br /> Blank 9020581-BLK2 <br /> Gasoline 3/5/99 ND ug/kg 10000 <br /> Benzene ND 500 <br /> Toluene ND 500 <br /> Ethylbenzene ND 500 <br /> Xylencs(total) ND 100 <br /> Surrogate a,a,a-Triuorotoluene 30000 29300 977 <br /> Surrogate 4-Bromofluorobenzene 30000 28700 95 7 <br />' LCS 9020581-BS2 <br /> Benzene 3/5/99 10000 10500 ug/kg 105 <br /> Toluene 10000 10000 100 <br /> Ethylbenzene 10000 9780 978 <br /> enes(total) 30000 29600 98 7 <br /> ORW:ogate a,a,a-Triuorotoluene 30000 31600 105 <br /> Batch 9030108 Date Prepared 3/4/99 Extraction Method EPA 5030 soils <br />' Blank 9030108-BLKI <br /> Gasoline 3/4/99 ND ug/kg 400 <br /> Benzene ND 200 <br /> Toluene ND 200 <br /> Ethylbenzene ND 200 <br /> Xylenes(total) ND 400 <br /> Surrogate a,a,a-Triuorotoluene 300 311 104 <br /> Surrogate 4-Bromofluorobenzene 300 177 923 <br /> LCS 9030108-BS1 <br />' Gasoline 3/4/99 2000 1970 ug/kg 98 5 <br /> Surrogate 4-Bromofl'uorobenzene to300 271 903 <br /> Matrix Spike 9030108-MSI P903073-01 <br />' Gasoline 3/4/99 2000 ND 1790 ug/kg 895 <br /> Surrogate 4-Bromofluorobenzene to300 249 " 830 <br /> Matrix Spike Dup 9030108-MSDI P903073-01 <br /> Gasoline 3/4/99 2000 ND 1760 ug/kg 880 1 69 <br /> Surrogate 4-Bromofluorobenzene It300 243 810 <br /> r <br />' Sequoia Analytical-Petaluma *Refer to end of report for test of notes and definitions <br /> Page 6 of 11 <br />