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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma CA 94954 <br /> m1W Arialytica (707)792 [ <br /> 865 <br /> FAx(707)792-0342342 <br /> www sequotalabs com <br /> URS Corp-Sacramento Project Arca Site 2130,Stockton,CA P412423 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intrim-50293 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 01/18/05 11 34 <br /> ANALYTICAL REPORT FOR SAMPLES <br /> Sample ID Laboratory ID Matni Date Sampled Date Received <br /> MW-I P412423-01 Water 12/20/04 12 45 12/23/04 10 30 <br /> MW-2 P412423-02 Water 12/20/04 12 25 12/23/04 1030 <br /> MW-3 P412423-03 Water 12/20/04 11 55 12/23/04 1030 <br /> MW-4 P412423-04 Water 12/20/04 10 14 12/23/04 1030 <br /> MW-5 P412423-05 Water 12/21/04 06 15 12/23/04 1030 <br /> MW-6 P412423-06 Water 12/20/04 11 05 12/23/04 1030 <br /> MW-7 P412423-07 Water 12/20/04 12 00 12/23/04 1030 <br /> VW-1 P412423-08 Water 12/20/04 12 50 12/23/04 10 30 <br /> VW-2 P412423-09 Water 12/21/04 05 55 12/23/04 10 30 <br /> VW-3 P412423-10 Water 12/20/04 13 38 12/23/04 10 30 <br /> VW-4 P412423-11 Water 12/20/04 13 10 12/23/04 10 30 <br /> VW-5 P412423-12 Water 12/21/04 06 40 12/23/04 10 30 <br /> VW-7 P412423-13 Water 12/20/04 13 50 12/23/04 1030 <br /> VW-8 P412423-14 Water 12/21/04 06 30 12/23/04 10 30 <br /> VW-10 P412423-15 Water 12/21/04 07 15 12/23/04 10 30 <br /> VW-11 P412423-16 Water 12/20/04 13 25 12/23/04 10 30 <br /> VW-12 P412423-17 Water 12/20/04 13 00 12/23/04 10 30 <br /> TB-2130-12202004 P412423-18 Water 12/20/04 00 00 12/23/04 10 30 <br /> The carbon range for the TPH-GRO has been changed from C6-C I O to C4-C12 The carbon range for TPH-DRO has been changed <br /> from C10-C28 to C10-06 EPA 8015B has been modified to better meet the requirements of California regulatory agencies <br /> These samples were received with Intact custody seals <br /> MS/MSD is reported for all batches in which the laboratory received sufficient sample volume to perform the MS/MSD analysts In the <br /> case where there was insufficient sample volume received for all samples associated in the batch,LCS/LCSD is analyzed in place of the <br /> MS/MSD <br /> The initial calibration criteria for EPA 8260 was not met The SPCC minimum RRF for Bromoform was<0 1 and for 1,1,2,2-PCE< <br /> 0 3 All criteria for benzene,toluene,ethyl benzene,xylenes,MtBE and other oxygenates were acceptable <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 2 of 33 <br />