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1 <br /> cbCurtis&Tompkins,Lid. <br /> CASE NARRATIVE <br /> Laboratory number: 227645 <br /> Client: URS Corporation <br /> Project : DVI-BP <br /> Location: DVI-Burn Pit <br /> Request Date: 05/02/11 <br /> Samples Received: 05/02/11 <br /> This data package contains sample and QC results for six water samples, <br /> requested for the above referenced project on 05/02/11. The samples were <br /> received cold and intact. <br /> Volatile Organics by GC/MS (EPA 8260B) : <br /> No analytical problems were encountered. <br /> ' Metals (EPA 6020) : <br /> High RPD was observed for iron in the BS/BSD for batch 174382. No other <br /> analytical problems were encountered. <br /> Ion Chromatography (EPA 300.0) : <br /> MW-6-BP (lab # 227645-003) was diluted due to high chloride concentration. <br /> MW-2-BP (lab # 227645-001) and MW-25-BP (lab # 227645-007) were diluted due <br /> to high sulfate concentrations. No other analytical problems were encountered. <br /> Hexavalent Chromium by Ion Chromatograph (EPA 7199) : <br /> No analytical problems were encountered. <br /> Alkalinity (SM2320B) : <br /> Low recoveries were observed for alkalinity, total as CaCO3 in the MS/MSD for <br /> batch 174307; the parent sample was not a project sample, and the LCS was <br /> within limits. No other analytical problems were encountered. <br /> Total Organic Carbon (TOC) (SM5310C) : <br /> No analytical problems were encountered. <br /> Page 1 of 1 <br /> 35.0 <br /> 2 of 47 <br />