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IWO 6 July 1999 <br /> AGE-NC Project No. 99-0604 <br /> Page 3 of 5 <br /> 3.2. SOIL PROBE BORINGS <br /> On 15 June 1999, two soil probe borings were advanced to depths of 30 feet bsg"at the site. The <br /> advancement of soil probe borings were accomplished utilizing a van-mounted Geoprobe 5400 <br /> equipped with 1.125-inch diameter probe rods with an attached 2.15-inch diameter soil sampler, <br /> using"direct push"technology. Probe borings B-1 and B-2 were advanced within the former UST <br /> area. Probe boring locations are depicted on Figure 2. <br /> LW <br /> 3.3. SOIL SAMPLE COLLECTION <br /> Discrete soil samples were collected at five-foot intervals beginning at approximately 5 feet bsg <br /> ` using a Geoprobe soil sampling assembly loaded with pre-cleaned 1.125-inch by 6-inch brass <br /> sleeves. Soil samples were preserved by covering both ends of the brass sleeves with Teflon sheets, <br /> F capping, and sealing with tape. Each sample sleeve was labeled with the soil probe boring location, <br /> depth, time, date and sampler's initials. <br /> ' The samples were logged on a chain-'of-custody form, stored in a chilled container and transported <br /> to a California Department of Health Services(DHS)-certified laboratory for analysis in accordance <br /> with: <br /> • EPA Method 5030/8015m for total petroleum hydrocarbons quantified as gasoline (TPH-g) <br /> �+ and diesel (TPH-d), <br /> E EPA Method 8020 for volatile aromatics(benzene,toluene,ethylbenzene,and total xylenes; <br /> BTEX). <br /> 3.4. LOGGING <br /> L During boring activities, sample duplicates were monitored for the presence of organic vapor using <br /> an organic vapor meter (OVM) and the readings were recorded on the boring logs. Soil sample <br /> r duplicates were visually described in accordance with the Unified Soil Classification System <br /> L (USCS). Boring logs are included in Appendix A. <br /> k <br /> r - <br /> Advanced GeoEnvironmental, Inc. <br /> r <br /> 1.tir <br />