Laserfiche WebLink
a <br /> IM Ma <br /> •cam--i..r'�;'° �; �A 'I% �.y! '�,"�'�. '�"r„Y'. „�,, .-s.- .�..;$i�'r.r, 4r- t ws . , <br /> fvlr-R.W. Conlon 2OZ1150.4150 <br /> October 9, 1990 Page 4 <br /> of approximately 15 feet below ground surface. Groundwater Tachnology responded to a request from <br /> TRMI to collect and analyze soil samples from the walls and the bottom of the excavation. <br /> 2.2 WELL LOCATION SURVEY <br /> A survey of all private, commercial and municipal wells within a half-mile radius of the site was <br /> conducted using in'.armation available from the California Department of Water Resources. The survey <br /> indicated that there are three domestic welts and a municipal well within the half-mile radius (Figure 3). <br /> 3.0 SCOPE OF WORK <br /> The purpose of this investigation is to provide an environmental assessment or the subsurface soil <br /> and groundwater conditions, and to determine the vertical and horizont2l extent of hydrocarbon <br /> constituents, if encountered. The investigation has included the following work steps: <br /> o Collection and laboratory analyses ol soil samples from the wails .nd bottom of the <br /> excavation beneath pump island number two. The samples were anaiyzed for total <br /> petroleum hydrocarbons-as-gasoline (TPH-G)and benzene, toluene, ethylbenzene and <br /> xylenes (BTEX) by modified U. S. Environmental Protection Agency (EPA) Methods <br /> 5030/8015/8020. <br /> o Installation of slotted PVC pipe beneath the foundation of the Food Mart building in the <br /> event that a soil-ventilation system (SVS) is required at a later date. <br /> 0 Collection and laboratory analyses of soil samples from 15 vertical borings and one angle <br /> boring to determine the subsurface soil conditions. Samples were analyzed for <br /> TPH-G, BTEX, organic lead and 1,2-dibromoethane. Selected samples were also <br /> analyzed for total petroleum hyd-ocarbons-as-diesel (TPH-D) anct total oil and grease <br /> (TOG). <br /> o Installation of 11 groundwater monitoring weds(MVVs)to determine the horizontal extent <br /> of the dissolved hydrocarbon plume within the groundwater. <br /> » GROUNDWATER <br /> TECHNOLOGY,INC. <br />