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07 May 1998 <br /> AGE-NC Project No 97-0332 <br /> Page 4 of 5 <br /> 4.0. PROCEDURES <br /> 41 ADVANCEMENT OF SOIL PROBE BORINGS <br /> The following procedures will be performed for the installation of probings <br /> 1 Notify the Public Health Services- Environmental Health Division at least 48 hours prior to <br /> commencement of any work, while securing proper city/county permits <br /> 2 Prepare a Site Health and Safety Plan in accordance with the Occupational Safety and Health <br /> Guidance Manual for Hazardous Waste Site Activities <br /> 3 Boring locations will be marked at least 48 hours in advance for an i Jnderground Service <br /> Alert (USA) check of underground utilities or pipes <br /> 4 Advance a minimum of(6)soil probe borings at the site At least two angled(30°) soil probe <br /> bonngs will be advanced to a depth of approximately 20 feet below site grade using a van- <br /> mounted Geoprobe probing urut equipped with 1 125-mch diameter rods, while at least four <br /> vertical soil probe borings will be advanced to approximately 10 feet bsg Proposed probe <br /> boring locations are depicted on Figure 2 <br /> 5 Decontaminate sampling equipment in an Alconox solution and rinse with -�A ater prior to <br /> each sampling run <br /> 6 Obtain soil samples at 10 feet, 15 feet and 20 feet bsg in the angled soil probe borings and <br /> at 5 feet and 10 feet bsg in the vertical borings Soil samples will be collected using a <br /> Geoprobe soil sampling assembly prc-loaded with four 1 125-inch by 6-Inch brass sleeves <br /> 7 Preserve soil samples in the second brass sleeve by covering both ends with Teflon sheets, <br /> capping,and sealing with tape Each sample will be labeled with the following site location, <br /> sample identification, depth, time and date <br /> 8 Document samples on a chain-of-custody form <br /> 9 Store samples In a chilled container and transport to a State-certified laboratory for analysis <br /> 10 Monitor soil sample duplicates for the presence of volatile organics using a photo-ionization <br /> detector(PTD) pre-calibrated to Isobutylene <br /> I I Log soil sample duplicates In accordance with the Unified Soil Classificat.on System <br /> 12 Backfill each probe boring to surface grade utilizing a tremae pipe and Portland type II <br /> cement <br /> 13 Selected soil samples will be analyzed by a State-certified laboratory for TPH-g, BTE&X, <br /> Advanced GeoEn%xronmental, Inc <br />