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23 June 1998 <br /> AGE-NC Project No. 96-0229 <br /> Page 4 of 5 <br /> 3.2. EQUIPMENT DECONTAMINATION <br /> All sampling tools and brass sleeves used for sample collection will be thoroughly rinsed with clean <br /> water after washing with a solution of Alconox. All down-hole equipment will be steam-cleaned <br /> prior to advancement in each borehole. <br /> 3.3. LABORATORY ANALYSIS <br /> The PHS-EHD will be given an opportunity to review selected soil samples prior to any laboratory <br /> analysis. Selected samples will be logged on a chain-of-custody form, placed in a chilled container <br /> and transported to a California state-certified laboratory for analysis in accordance with the <br /> following: <br /> • EPA method 8015M for TPH-g. <br /> • EPA method 8020 for BTE&X with MTBE. <br /> • EPA method 8260 for oxygenated compounds including tertiary butyl ether(TBA), methyl <br /> tertiary butyl ether(MTBE),di-isopropyl ether(DIPE), ethyl tertiary butyl ether(ETBE) and <br /> tertiary amyl methyl ether(TAME). <br /> The laboratory report,testing methods,laboratory quality assurance/quality control (QA/QC)reports <br /> and sample chain-of-custody documentation will be presented in a report with the findings and <br /> recommendations. <br /> 4.0. PROCEDURES <br /> 4.1. DRILLING AND SAMPLING <br /> The following procedures will be performed for the advancement of soil borings: <br /> 1. Notify the PHS-EHD 48 hours prior to commencement of any work, while securing proper <br /> city/county soil boring permits. <br /> 2. Mark boring locations at least 48 hours in advance for an Underground Service Alert (USA) <br /> check of underground utilities or pipes. <br /> 3. Advance at least four soil borings utilizing a truck-mounted CPT drill rig and 2-inch <br /> diameter hollow stem rods. The proposed boring locations are shown on Figure 2. <br /> Advanced GeoEnviro=ental,Inc. <br />