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Suit <br /> Sequoia 819acraStriker Avenue, 958 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical F )921-0]00 <br /> www.sequ.secluoialabs.corn <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548, Stockton,CA <br /> 3330 Cameron Park Dr. Project Number. N/A Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 01/25/01 16:15 <br /> Total Purgeable Hydrocarbons (C6-CX2), BTEX and MTBE in Air(ppmv) by DHS LUFT <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte yt Result Limit Units Dilution Batch Prepared Analyzed Method Notes I <br /> Inf Total Air(5101328-01)Air Sampled: 01/23/01 07:51 Received: 01/23/0109:57 <br /> Purgeable Hydrocarbons 64.0 2.80 ppmv 1 1010253 01/24/01 01/24/01 DHS LUFT P-04 <br /> Benzene ND 0-0160 " <br /> Toluene 1.07 0.0130 <br /> Ethylbenzene 1,05 0.0120 " <br /> Xylenes(total) 5.72 0.0120 <br /> Methyl tert-butyl ether ND 0.140 <br /> Surrogate: a,a,a-Tris luorotoluene 110% 60-140 <br /> I <br /> Inf Cat Air(5101328-02)Air Sampled: 01/23/01 07:41 Received: 01/23/0109:57 <br /> Purgeable Hydrocarbons 73.7 2.80 ppmv 1 1010253 01/24/01 01/24/01 DHS LUFT P-04 <br /> Benzene 0.0164 0.0160 " <br /> Toluene 1,24 0.0130 " <br /> Ethylbenzene 1.19 0.0120 " <br /> AN enes(total) 6.30 0.0120 <br /> thyl Cert-butyl ether___ ND 0.140 <br /> Surrogate: a,a,a-Trifluorotoluene 111 % 60-140 <br /> Eff Air(5101328-03)Air Sampled: 01/23/0107:37 Received:01123/0109:57 <br /> Purgeable Hydrocarbons ND 2.80 ppmv 1 1010253 01/24/01 01/24/01 DNS LUFT <br /> Benzene ND 0.0160 " <br /> Toluene ND 0.0130 " <br /> Ethylbenzene ND 0.0120 " <br /> Xylenes(total) 0.0220 0.0120 " <br /> Methyl tent-butyl ether ND 0.140 " <br /> Surrogate:a,a,a-Trifluorotoluene 80,0% 60-140 <br /> uoia Analytical- Sacramento <br /> y The results in this report apply to the samples analyzed in accordance iritlz the chap:of <br /> custody document. This analytical report must be reproduced in its entirety, <br /> Page 3 of 6 <br />