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t� Sequoia 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> "Analytical (916)921-9600 <br /> FAX(916)921-0100 <br /> Emcon-Cameron Park Project: ARCO 2186,Stockton Sampled: 6/24/99 to 6125199 <br /> 3939 Cambridge Road,Ste.202 Project Number: NIA <br /> Cameron Park,CA 95682 Received: 6125/99 <br /> Project Manager: Mark Capps Reported: 7111199 <br /> <G Total Purgeable Hyd'r,'ocarbonsy{C6 C12 ,R a,jd K # <br /> F by y, ) ,,T.? AI-SE,I�IIQVI E'by DHS LUFTIQualaty Control <br /> t f� <br /> k,_s moi€ �Sequora Analytical Sacrarriento s'gr s F <br /> Date Spike Sample QC Reporting Limit Recov, RPD RPD <br /> Anal a Ana] zed Level Result Result Units Recov.Limits % Limit V. Notes` <br /> Surrogate: a,a,a-Trifluorotoluene 6130/9 p 200 <br /> 0.178 mg/kg 60.0-140 89.0 <br /> LES 90700p7 <br /> Benzene 6/30/99 0.200 0.204 mg/kg 70.0-130 102 <br /> Toluene " 0.200 0.220 " 70.0-130 !10 <br /> Ethylbenzene 0.200 0.221 70.0-70.0-130 0 <br /> 11 <br /> Xylenes(total) " 0.600 0.59I ,130 11 <br /> Methyl Cert-butyl ether 0.200 0.197 8.5 <br /> 70.0-130 98.5 <br /> Surrogate: a,a,a-Tris luorotoluene 0.200 0.178 60.0-140 89.0 <br /> Matrix Spikr 2929Q.QZ-M51 5906437-OS <br /> Benzene 6/30/99 , 0.200 ND 0.185 mg/kg 60.0-140 92.5 <br /> Toluene, 0.200 ND 0.196 0 <br /> 6(7.0-140 9$. <br /> Ethylbenzene 0.200 ND 0.200 60.0-140 8.0 <br /> Xylenes(total) 0.600 ND 0.544 60.0-140 90.7 <br /> Methyl tert-butyl ether 0.200 ND 0.184 0 <br /> 0 9 <br /> 60.0-14 0. <br /> Surrogate: a,a,a-Trifluorotoluene 0.200 0.191 60.0-14 92. <br /> LYlatrix SRl{.Ilnn 9070002-US 1 5906437-1}R <br /> Benzene 6130/99 0.200 ND 0.I83 rn , <br /> Toluene 8�g 60.0-140 91.5. 25.0 1.09 <br /> 0.200 ND 0.1$6 60.0-140 93.0 25.0 5.24 <br /> Xylenes <br /> Ethylbenzene 0.200 ND 0.198 60.0-140 99.0 25.0 1.01 <br /> Xylenes(total) 0.600 ND 0.542 60.0-140 90.3 25.0 0.442 <br /> Methyl Cert-butyl ether 0.200 ND 0.180 60.0-140 90.0 25.0 2.20 <br /> Surrogate: a,a,a-Trifluorotoluene 0.200 0.188' 60.0-140 94.0 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of motes and definitions, <br /> Page 12 of 16 <br />