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Sequoia 819 Striker Avenue, 4 <br /> Sacramento,CA 958 95$34 <br /> (916)9Z I-9600 <br /> Analytical <br /> FAX(916)9abs.co 0 <br /> www.sequolalahs.corn <br /> • <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548,Stockton,CA <br /> 3330 Cameron Park Dr.Ste 550 Project Number: 548,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Steve Carter 02/14/02 14:43 <br /> Total Purgeable Hydrocarbons, BTEX and MTBE in Air (ppmv) by DHS LUFT i <br /> Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Hatch Prepared Analyzed Method Notes <br /> INF Total Air(S202027-01)Air Sampled:02104/0212:00 Received: 02104102.14:09 <br /> Purgeable Hydrocarbons 140 120 ppmv 50 2020054 02/05/02 02/05/02 DHS LUFT HC-12 <br /> Benzene. ND 0.80 " <br /> Toluene 2.4 0.65 " <br /> Ethylbenzene ND 0,60 " <br /> Xylenes(total) 5.7 0.60 <br /> Methyl tert-butyl ether ND 7.0 _ <br /> Surrogate:a,a,a-Trifluorotoluene 98.8% 60-140 <br /> INF CAT Air(5202027-02)Air Sampled:0210410211:56 Received: 0210410214:09 <br /> Purgeable Hydrocarbons 150 140 ppmv 50 2020054 02/05/02 02/05/02 DMS LUFI' HC-12 <br /> Benzene ND 0.80 " <br /> Toluene 1.7 0.65 " <br /> Ethylbenzene ND 0.60 " <br /> lenes'(total) 4.9 0.60 <br /> ethyl tert-butyl ether ND 7.0 <br /> Surrogate:a,a,a=Triuorotoluene 95.5% 60-140 <br /> EFF Air(S202027-03)Air Sampled:02/04/02 11.54 Received: 02/04/02 14:09 <br /> Purgeable Hydrocarbons ND 2.8 ppmv 1 2020054 02/05/02 02/05/02 DHS LUFT <br /> Benzene ND 0.016 <br /> Toluene. ND 0.013 " <br /> Ethylbenzene ND 0.012 <br /> Xylenes'(total) ND 0.012 " <br /> Methyl Cert-butyl ether _ ND 0.14 <br /> Surrogate.'a,a,a-Triuorotoluene .89.9% 60-140 <br /> equoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 3 of 6 <br />