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1 <br /> ' In September 1992 a preliminary site assessment was conducted b Canome Environmental to <br /> • P P �'Y Y <br /> ' further evaluate the subsurface conditions at the site This investigation involved drilling a total <br /> of nine soil borings Three of the borings were completed as 4-inch diameter vapor extraction <br /> ' wells (W-1, W-2, and W-3) and four of the borings were completed as 2-inch diameter vapor- <br /> inlet wells (W-4, W-5, and W-6) Approximate locations of these borings and wells are shown <br /> ' on Figure 2 Results indicated that the petroleum hydrocarbons exist primarily in the area of the <br /> former tanks to a depth of 30 to 35 feet bsg The data for this investigation is contained in the <br /> ' document, Site Assessment Work-Plan dated July 24, 1992, prepared by Canonie <br /> ' 3.0 SCOPE OF WORD <br /> ' Prior to commencing work, a Site Specific Health and Safety Plan was prepared in accordance <br /> ' with Occupational Safety and Health Administration (OSHA) Standard 29 CFR 1910 120 All <br /> personnel contracted for the field investigation were required to review and understand this plan <br /> In addition, a utility clearance was conducted to safeguard that the drilling activities would not <br /> impact any subsurface utilities The clearance involved retaining a private Iocating service for <br /> ' locating and marking underground utilities at the site Underground Service Alert (USA) was <br /> notified 48 hours before the drilling start date for clearing and locating public utilities off site <br /> 31 Soil-Borings <br /> ' On December 2 and 3, 1993, SEACOR supervised the drilling of five soil borings at the site The <br /> approximate location of these borings and other selected site features are shown on Figure 2 <br /> ' Soil borings SB-6 and SB-7 were advanced to 41 5 feet bgs and borings W-7 (SB-8), SB-9, and <br /> W-8 were advanced to 56 5 feet bgs using a CME-55 drill rig equipped with 8-inch outside <br /> ' diameter hollow-stem augers operated by Geo-Environmental Drilling Corporation <br /> The drilling was supervised by a field geologist working under the direction of a State of <br /> ' California registered geologist A continuous log of materials encountered while drilling was <br /> completed by the field geologist and described in accordance with the Unified Soil Classification <br /> ' LOCKE RPT SEACRR` <br /> Job No N0005-001 01 June 14 1994 <br />