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07 May 1998 <br /> AGE-NC Project No. 98-0448 <br /> Page 4 of 6 <br /> Selected soil samples may also be analyzed for intrinsic permeability,moisture content,porosity and <br /> total organic carbon (TOC) in accordance with the appropriate EPA or ASTM methods. <br /> Laboratory reports of soil analyses, testing methods, laboratory quality assurance/quality control <br /> (QA/QC) reports, and sample chain of custody documentation will be presented in a report. The <br /> report will be signed by a California Registered Geologist, and will include findings and <br /> recommendations arising from analysis of the data. <br /> 4.0. PROCEDURES <br /> 4.1. INSTALLATION OF GROUNDWATER MONITORING WELLS <br /> The following procedures will be performed for installation of the monitoring wells: <br /> 1. Advance soil borings using a truck-mounted drill rig: three borings will be advanced to <br /> depths of 35 to 40 feet bsg using 8.25-inch hollow stem augers; one soil boring will be <br /> advanced to a depth of at least 50 feet bsg using 12-inch diameter hollow-stem augers for <br /> dual-completion. Refer to Figure 2 for proposed soil boring locations. <br /> 2. Decontaminate all sampling equipment in an Alconox solution and rinse twice with water <br /> prior to each sampling run. Steam-clean auger flights before advancement of each boring. <br /> 3. Sample soil from each boring, beginning at five feet bsg, utilizing a California split-spoon <br /> sampler and pre-cleaned 2-inch by 6-inch brass sleeves. <br /> 4. Preserve soil in the brass sleeve by covering both ends with aluminum foil or Teflon-tape, <br /> capping, and sealing with tape. <br /> 5. Label and record samples on a chain-of-custody form. <br /> 6. Store the samples under ice and transport the samples in a chilled ice chest to a state-certified <br /> laboratory for analysis. <br /> 7. Screen soil sample duplicates for the presence of volatile organic compounds using an <br /> organic vapor meter equipped with photo-ionization detector (PID) pre-calibrated to <br /> isobutylene. <br /> 8. Log borings in accordance with the Unified Soil Classification System. <br /> 9. Selected soil samples will be analyzed for TPH-g, TPH-d, BTE&X and oxygenated <br /> compounds (including MTBE, TBA, DIPE, ETBE and TAME) in accordance with the <br /> appropriate EPA methods. <br /> 10. Transport and release selected soil samples to a state-certified laboratory for analysis for <br /> Advanced GeoEnvironmental,Inc. <br />