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APR 17 '00 11:54AM SEflUdIAzSAC P. 14/1B <br /> 619 Striker Avenue.SUtte 6 <br /> 5amnwnto.CA 95834 <br /> Sequoia f9 16)921.9600 <br /> FAX(9161921-0100 <br /> CD. <br /> Analytical <br /> SECOR International-Sacramento Project ARCO 4493,Stockton,CA Sampled- 3128100 1 <br /> 9912 Business Park Dr_,Ste. 100 Project Nwnber. NIA Rcuived: 3131/M <br /> Sacramento,CA 95827 Project er.- Rusty Benko ncd= 4/11/00 <br /> Total Purgeable Hydrocarbons(C6-Cll),BTEX>and'MTBF-by DHS LUl~T/Quality.Control <br /> Sequoia•An alyriesl-S aeramenfo <br /> Datc Spike Sample QC Reporting Limit Rccov. RPD RPD } <br /> Analyte _ Analyzed Levcl _ Result Result Units Recov. Limits % Limit % ]dotes' <br /> Battb: 0 10091 Yate Prepared_ 4/10/90 Extra,cti9n Methad= EPA 5030B IMeOHI <br /> Blank OG40091-B LKI <br /> Purgeable Hydrocarbons 4/10/00 ND ug/1 50.0 <br /> Benzene ND 0.500 <br /> Toluene ND 0.500 <br /> EIhylbenzene Nt D 0,500 <br /> Xylencs(total) ND OSOD <br /> Methyl tent-butyl ether " ND ZSO <br /> Surrogate: o,oa-Trifluorotoluene 10.0 11.1 60.0-146 111 <br /> LCS 0040091-8S1 <br /> Benzene 4110100 10.0 9.18 ug/1 70.0-130 91.8 <br /> Toluene 10.0 9.23 700-1.30 92.3 <br /> E nzcnc 10.0 9.68 70.0-130 96.8 <br /> X (total) 30,0 28.8 70-0-130 96.0 <br /> Methyl lett-bury] erher - 10-0 9.08 70.0-130 90.8 - <br /> Surrogate aa,a-Triflrlororoluene 10.0 113 50.0-144 113 <br /> Matrix Spike 0044091-M5 5003387-09 <br /> Bcn=c 4/10100 10.0 NTD 9.16 ug/I 60.0-14-0 91-6 <br /> Toluene 10.0 ND 9.28 64.0-140 92.8 <br /> Ethyibenzcnc 10.0 ND 9.90 60.0-140 99.0 <br /> Xylenes(total) 30.4 ND 29.6 ¢0.0-140 98-7 <br /> Meth tett-butyl ether 10_0 HYD I 1.7 60.0-140 117 <br /> Surrogate: a,a a-Trifluorotolurrte 10.0 11.2 60.0-140 112 <br /> Matrix Spike Dup 4 0 1-MSD1 5003 87-09 <br /> gee 4/14/00 10.0 ND 9.13 ug/1 60.0-140 913 ?5.D 0 328 <br /> Toluene 10.0 ND 9.30 60.0-140 93.0 25.0 0.215 <br /> Ethylbenzene " 10.0 ND 9.83 60.D-140 983 25.0 0.710 <br /> Xylenes(total) 30.0 ND 29.4 60.0-140 98.0 25.0 0.712. <br /> Methyl wx--bu l ether 10.0 ND 10.6 60.0-140 106 35.0 9.57 <br /> Surrogate: o a.a-Trifluormolusne 10.0 10.8 60.0-140 108 <br /> Sequoia Analytical-Saettimenta -Refer to end of report for trxr of nares aKd defixrrions. <br /> Pago11of15 <br />