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Sequoia $195tnkerAvenue 8 958 Sacramento CA 95834 61 IX—N (916) 921-9600 FAX 00 011%_0 Analytical www sequo3alabscom Delta Environmental Consultants(Cameron Park) Project ARCO 2186, Stockton,CA 3330 Cameron Park Dr Project Number N/A Reporters Cameron Part.CA,9682 Protect Manager Jay Johnson 04/02/01 14 39 Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control Sequoia Analytical - Sacramento Reporting Spike Source %REC RPD Analyte Result t,tmit units Level Result °ioREC Limits RPD Limit Notes Batch 1030291 -EPA 5030B (P/T) Blank(1030291-BLKI) Prepared 03/21/01 Analyzed 04/02/01 Purgeable Hydrocarbons ND Sfl 0 ug/1 Benzene ND 0 500 " TOluene ND 0 500 Ethylbenzene ND 0 500 " Xylenes(total) ND 0 500 " Sur rogate a a a-Trifluor otoluene 933 100 933 60-140 LCS(1030291-BSI) Prepared 03/21/01 Analyzed 04/02/01 Benzene 949 0 500 ug/l 100 849 70-130 Toluene 909 0 500 100 909 70-130 6thylbenzene 9 53 0 500 100 953 70-130 ylenes(total) 28 3 0 500 300 943 70-130 Surrogate a a a Triuorctoluene 921 " 100 921 60-140 1\latria Spike(1030291-MSI) _ Source 5103318-04 Prepared&Analyzed 03/21/01 Benzene 693 0 500 ug/l 100 NO 693 60-140 Toluene 7 60 0 500 100 ND 76 0 60-140 Ethylbenzene 869 0 500 100 ND 969 60-140 Xylenes(total) 257 0 500 300 ND 857 60-140 Surrogate a a a-Tr y7uorotoluene 859 100 859 60-140 Matrix Spike Dup(1030291-MSDI) Source 5103318-04 Prepared&Analyzed 03/21/01 Benzene 498 0 500 ugli 100 ND 498 60-140 327 25 Q-02 Toluene 5 63 0 500 100 ND 563 60-140 298 25 Q-02 Ethylbenzene 621 0 500 100 ND 62 I 60-140 333 25 Q-02 Xylenes(total) 184 0 500 300 ND 613 60-140 33 1 25 Q-02 Surrogate aaa-Tr�luoi otoluene -587 10 0 387 60-140 5-04 Wequola 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 10