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' cb Curtis&Tompkins.Ltd. <br /> tCASE NARRATIVE <br /> Laboratory number: 260200 <br /> ' Client: URS Corporation <br /> Project: 17327022 <br /> Location: DVI-Burn Pit <br /> ' Request Date: 08/25/14 <br /> Samples Received: 08/25/14 <br /> This data package contains sample and QC results for six water samples, <br /> requested for the above referenced project on 08/25/14. See attached cooler <br /> receipt form for any sample receipt problems or discrepancies. <br /> ' Volatile Organics by GC/MS (EPA 8260B) <br /> High response was observed for hexachlorobutadiene in the ICV analyzed <br /> 03/04/14 14:47; this analyte was not detected at or above the RL in the <br /> ' associated samples. <br /> High responses were observed for bromomethane and Freon 12 in the CCV <br /> analyzed 09/02/14 08:21; these analytes were not detected at or above the RL <br /> ' in the associated samples. <br /> High response was observed for carbon disulfide in the CCV analyzed 08/28/14 <br /> ' 10:40; this analyte was not detected at or above the RL in the associated <br /> samples. <br /> No other analytical problems were encountered. <br /> ' Metals (EPA 6020 and EPA 7470A) • <br /> Responses exceeding the instrument's linear range were observed for magnesium <br /> and manganese in the MS/MSD of MW-25-BP (lab # 260200-006) . <br /> No other analytical problems were encountered. <br /> Ion Chromatooraohy (EPA 300.0) * <br /> MW-2-BP (lab # 260200-001) was diluted due to high sulfate concentration. <br /> MW-2-BP (lab # 260200-001) , MW-24-BP (lab # 260200-005) , and MW-25-BP (lab # <br /> 260200-006) were diluted due to high chloride concentrations. <br /> No other analytical problems were encountered. <br /> ' Hexavalent Chromium by Ion Chromatoaraoh (EPA 7199) <br /> No analytical problems were encountered. <br /> ' Alkalinity (SM2320B) - <br /> No analytical problems were encountered. <br /> ' Total Organic Carbon (TOC) (SM5310C) • <br /> No analytical problems were encountered. <br /> ' Page 1 of 2 <br /> =_z.o <br /> ' 2 of 242 <br />