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06 March 2002 <br /> AGE-NC Project No. 99-0641 <br /> Page 3 of 6 <br /> 3.0. PROCEDURES <br /> On 04 February 2002, one soil boring was advanced at the site as part of the assessment related to <br /> the former waste oil UST system. The field work was conducted as outlined in the AGE-prepared <br /> Ground Water Investigation Work Plan, dated 03 August 2001. <br /> 3.1. DRILLING <br /> Soil probe boring SB-1 was advanced utilizing a van-mounted Geoprobe 5400 equipped with <br /> 1.125-inch diameter probe rods with an attached 2.15-inch diameter soil sampler,using"direct push" <br /> technology. The probe boring was advanced vertically to a maximum depth of 30 feet bsg. <br /> 3.2. SOIL SAMPLING <br /> Discrete soil samples were collected at 5-foot intervals, beginning at 10 feet bsg in boring SB-1 <br /> using a Geoprobe two-foot soil sampling assembly loaded with four pre-cleaned 1.125-inch by <br /> 6-inch brass sleeves. Soil samples were preserved by covering both ends of a selected brass sleeve <br /> with Teflon sheets, capping, and sealing with tape. Each sample sleeve was labeled with soil probe <br /> boring location, depth, time, date and sampler's initials. <br /> ' Two soil samples collected from boring SB-1 were logged on a chain-of-custody form, placed in a <br /> chilled container and transported to McCampbell Analytical, Inc. (MAI), a State of California <br /> Department of Health Services (DHS)-certified laboratory. <br /> 3.3. SOIL ANALYSES <br /> The soil samples were analyzed for volatile organic compounds including BTEX in accordance with <br /> EPA Method 8260M. <br /> 3.4. SOIL LOGGING <br /> During drilling, soil sample duplicates were monitored for the presence of organic vapor using an <br /> organic vapor meter equipped with a photo-ionization detector(PID: Thermo Environmental 580A, <br /> 10.0 eV, calibrated to isobutylene) and were visually described on boring logs in accordance with <br /> the Unified Soil Classification System (USCS). The boring log is included as Appendix A. <br /> Advanced GeOEnvironmentul,Inc. <br />