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Treadvvell8AWb 3 Sampling results and laboratory analytical methods used during our subsurface investigations 2.0 SITE DESCRIPTION ' The Site is part of the Banner Island Redevelopment Project,which includes the area north of the ' Stockton Channel bounded by North Lincoln Street to the west, West Fremont Street to the north, and Commerce Street to the east 1 Until March 2004,the Site was covered by several buildings with a walk-through interior ' During March 2004, the buildings were demolished in preparation for redevelopment Prior to the City's purchase of the property, the Site was operated by the Carando Machine Works as a machine shop Buildings in the southern half of the Site were constructed between 1920 and 1950 Aerial photographs and Sanborn maps show a gas station pump and service station in the northwest area of the Site from at least 1950 until the late 1960s The approximate locations of the former service station,USTs, and pump islands are shown on Figure 2 From the late 1960s ' on, the entire Site has been occupied by buildings operated by Carando Machine Works ' 3.0 SOIL AND GROUNDWATER CONDITIONS ' Although no monitoring wells are present at the Site, groundwater monitoring at adjacent and nearby sites indicates a northeasterly groundwater flow direction at the Site Groundwater is ' generally encountered in wells near the Site at approximately 17 to 19 feet below ground surface (bgs) The Site is underlain by silts and clays with some shallow silty sand layers During a ' June 2003 investigation, Advanced GeoEnvironmental(AGE) advanced eight borings(B-1 through B-8) and obtained groundwater grab samples from Borings B-1 through B-4, and B-6 ' through B-8 (AGE, 2003a) On behalf of the City,the water samples were analyzed for total petroleum hydrocarbons as gasoline (TPH-g) and diesel (TPH-d) and for VOCs None of these ' compounds were detected in any of the water samples except from the sample collected from Bonng B-3, located in the sidewalk adjacent to the Site along West Fremont Street The groundwater sample from Bonng B-3 contained petroleum hydrocarbons quantified in the range ' 25971020 DGD 2 23 August 2004 i