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:, <br /> .R <br /> Sequoia <br /> �qt ala 619 Striker Avenue,Sult958 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> Ana <br /> ly ical FAX(916)921-0100 <br /> . 4l www.sequotalabs.coabs.cow <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548,Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: NIA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 09/18/01 11:39 <br /> Total Purgeable Hydrocarbons, BTEX and MTBE in Air by DHS LUFT <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Metbod Notes <br /> INF Total(S109019-01)Air Sampled: 09/05/0105:01 Received:09/090107:00 <br /> Purgeabie Hydrocarbons 1000 500 mg/ml Air 50 1090028 09/05/01 09/05/01 DHS LUFT <br /> Benzene ND 2.5 " <br /> Toluene 10 2.5 " <br /> Ethylbenzene '5.7 2.5 " <br /> Xylenes(total) 110 2.5 <br /> Methyl tert-butyl ether N_D 25 <br /> Surrogate: a,a,a-Trlfluorotoluene -- - 98.0% 60-140 " <br /> INF Cat(S109019-02)Air Sampled:09/05/0104-58 Received:09/05/0107:00 <br /> Purgeable Hydrocarbons ND 2000 mg/m'Air 200 1090087 09/07/01 09/07/01 DHS LUFT A-01 <br /> Benzene ND 10 A-01 <br /> Toluene ND 10 A-01 <br /> ylbenzene ND 10 A-01 <br /> enes(total) 65 10 A-01 <br /> ethyl tert-butyl ether ND 100 A-01 <br /> Surrogate: a o,a-Trifluorotoluene 106% 60-140 A-01 <br /> EFF(5109019-03)Air Sampled: 09/05/01 04:55 Received: 09/05/0107:00 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air 1 1090090 09/06/01 09/06/01 DHS LUFT <br /> Benzene ND 0.050 " <br /> Toluene ND 0.050 " <br /> Ethylbenzene ND 0.050 " <br /> Xylenes(total) ND 0.050 " <br /> Methyl tert-butyl ether ND _ 0.50 <br /> Surrogate:a,a,ct-Tris luorotoluene 89.0% �60-140 " <br /> quoia 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 2 of 9 <br />