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2.3 Monitoring Well Installation <br /> In September 1988, three groundwater monitoring wells were installed at the site by <br /> Klienfelder. Laboratory results of soil samples collected during the installation of <br /> monitoring well MW-3 indicated that hydrocarbon impacted soil was present. <br /> After installation, a groundwater sample was collected from each well. Low concentrations <br /> of total petroleum hydrocarbons (TPH as gasoline), xylenes and ethylenedibromide (EDB) <br /> were detected ill the sample from MW-3. Coliform was also detected in samples from each <br /> well. No other impacted soil or groundwater was encountered during this investigation. <br /> 2.4 Groundwater Depth and Gradient <br /> According to data obtained from the oil-site nionitorinyg,Nvells, depth to groundwater is <br /> between 8 and 10 feet below StlrfaCe grade (bsg). Groundwater flow direction at the site <br /> is northerly, with a gradient of 0.263 percent. Tilts flow direction is consistent with local and <br /> regional flow directions. <br /> 2.5 Soil Borings <br /> In February 1995, two soil borings were drilled at the site. Soil samples collected from the <br /> borings indicated that impacted soil was present in the arta near the former dispelhser <br /> Island. Ont' grab gl"ollladwatt:'r sample was also collected from each boring-, analytical results <br /> of the groundwater samples indicated that impacted groundwater was present near the <br /> dispenser islands and at the north portion of the property, towards Grant Line Road. <br /> 3.0 SCOPE OF NVORK <br /> AGI_ proposes to excavate impacted soil from the former dispenser- :lira, between Tank <br /> Excavations A and B, Approximately 100 cubic yardk of impacted soil xvill be excavated <br /> from the area. Excavation \vlll be monitored and directed easing a ph0t0-i0111Zat1loll detector. <br /> Excavated soil Nvill be stockpiled on plastic sllee.tnlg near the soutlicast corner of the site. <br /> Soil samples will be collected adutlg e,tell side%ajtll �trld, 11, necessarv, tronl the floor of the <br /> 'oil to a depth of appromillateiy S feet; therefore, <br /> excavation. \ 'e. anticipate exr�i\:it <br /> groundwater will be encountered In the excavation. At the recItiest of the Sall Joaquin <br /> County Public Heralth Services - Environmental I lealth Division (PI IS/El ID) a water sample <br /> can be collected from the excavation. <br /> After collection of soil samples, the excavation will be backfilled to the surface. with clean <br /> fill dirt; the area x%,i11_ then be resurfaced with asphalt. <br /> Hi 6-IL1,.,,.,,, 1- <br />