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kBC* Laboratories, Inc S . <br /> TRC Alton Geoscience Project 5886 <br /> 21 Technology Drive Project Number [none] <br /> Irvine CA,92618-2302 Project Manager Anju Farfan Reported 08/30/05 05 51 <br /> Purgeable Aromatics and Total Petroleum Hydrocarbons <br /> Quality Control Report - Laboratory Control Sample <br /> Control Limits <br /> Spike Percent Percent <br /> Constituent Batch ID QC Sample ID QC Type Result Level PQL Units Recove RPD Recovery RPD Lab Quals <br /> Gasoline Range Organics (C4-C12) BOH1356 BOH1356-BS1 LCS 11427 10000 50 uglL 114 85-115 <br /> a a a-Tnfluorotoluene(FID Surrogate) BOH1356 BOH1356-BS1 LCS 13264 12000 uglL 111 70-130 <br /> I <br /> I <br /> I <br /> BC Laboratories The results in this report apply to the samples analyzed in accordance with the chain of custody document Thts analytical report must be reproduced in its entirety <br /> All mulls listed in this report are for the exclusive use of the submitting parry B(.Laboratories Inc assumes no responsibility for report alteration separation detachment or third party interpretation <br /> 4100 Atlas Court•Bakersfield,CA 93308•(661)327-4911 •FAX(661) 327-1918•wwwbclabs com Page 48 of 51 <br />