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Work Objectives/Scope: Conduct soil and groundwater investigation related to a former <br /> underground storage tank (UST) For this investigation, soil and groundwater grab samples will <br /> be collected from twelve (12) soil borings using a Geoprobe 5400 Direct Penetration Technology <br /> (DPT)ng <br /> Activities Planned (Check those that are applicable) <br /> Underground storage tank removal <br /> oversight of soil excavation with backhoe or other equipment <br /> Confirmation soil sampling during soil excavation and removal <br /> soil gas survey <br /> X soil boring and soil and groundwater grab sampling <br /> drilling of wells, including installation, development and sampling of groundwater <br /> and soil <br /> Groundwater sampling of onsite wells <br /> other <br /> I1. SITE INFORMATION <br /> Site Description: The site is located at 503 East Tenth Street in the city of Tracy (San <br /> Joaquin County), California The site is an active agricultural commissioner's office situated <br /> within a complex of county and city offices <br /> Unusual Features: Possible underground utility lines Underground Service Alert (USA)will <br /> be called at least 48 hours prior to site work Geoprobe operator will be asked to hand auger <br /> and/or probe to five feet below ground surface (bgs) if drilling near any underground utility lines <br /> Site Background/History: The site formerly contained three USTs The USTs contained <br /> unleaded gasoline and weed oil (i e , diesel fuel) until they were removed in 1988 Soil beneath <br /> the USTs contained up to 4,800 parts per million (ppm) of Total Extractable Petroleum <br />' Hydrocarbons (TEPH) and 760 ppm of Total Volatile Petroleum Hydrocarbons (TVPH) <br /> Groundwater was not encountered at a maximum excavation depth of 10 feet bgs The extent of <br /> impacted soil was not defined <br /> i <br /> 1 2 <br /> 1 <br />