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//�� 819 Striker Avenue,Suite 8 Sequoia Sacramento,CA 95834 (916 9Z 1 S00 equoia (916)921-0E 0 Analytical www.sequolatabs.com Delta Environmental Consultants(Cameron Park) Project: ARCO 5469, Stockton,CA 3330 Cameron Park Dr. Ste 530 Project Number: N/A Reported: Cameron Park CA, 95682 Project Manager: Jay Johnson 10/0I/01 15:20 Total Purgeable Hydrocarbons and BTEX by DHS LUFT Sequoia Analytical - Sacramento Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Nous MW1-39'(5109223-01)Water Sampled: 09/14/0105:20 Received: 09/14/01 10:17 Purgeable Hydrocarbons ND 50 ug/1 1 1090154 09/16/01 09/16/01 DHS LUFT Benzene ND 0.50 Toluene ND 0.50 IF " Ethylbenzene ND 0,50 Xylenes(total) _ _ _ ND 0.50 Surrogate: a,a,a-Tr�uorotoluene — 118% 60-140 11 IF — MW2-38'(5109223-02) Water Sampled: 09114/0106:30 Received: 09/14/01 10:17 Purgeable Hydrocarbons ND 50 ug/l 1 1090154 09/16/01 09/16/01 DHS LUFT A-01 Benzene 0.57 0.50 IF " " " A-01 Toluene ND 0.50 " " " A-01 Ethylbenzene ND 0.50 " A-01 Xylenes(total)—..-- ND 0.50 _ „ " " A-01 0ogate: a,a,a-Trifluorotoluene 111 % 60-140 — "-- A-01 3-38'(5109223-03)Water Sampled. 09/14/0104:59 Received: 09/14/01 10:17 Purgeable Hydrocarbons ND 50 ug/1 l 1090154 09/16/01 09/16/01 DHS LUFT Benzene ND 0.50 " " " " " Toluene ND 0.50 IF I. IF IF " Ethylbenzene ND 0.50 " Xylenes(total) ND 0.50 Surrogate:a,a,a-Trifluorotoluene 116% 60-140 " IF MW4-39' (S109223-04)Water Sampled. 09114/0106:14 Received: 09/14/01 10:17 Purgeable Hydrocarbons 2000 2000 ug/l 40 1090168 09/17/01 09/17/01 DHS LUFT Benzene 980 20 IF " " Toluene ND 20 IF IF IF Ethylbenzene ND 20 " " " IF Xylenes(total) 20 20 FF IF IF ' Surrogate:a,a,a-Trifluorotoluene 115% 60-140 IF " uoia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Page 6 of 13