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L <br /> Former Discovery Chevrolet <br /> August 12, 1994 <br /> To complete the investigation outlined above, GSI proposes the following scope of <br /> work: <br /> Task 1 . Pre-field Activities: Obtain the required groundwater monitoring well <br /> permits from SJCEHD, and notify Underground Service Alert (USA) of <br /> the planned activities. <br /> Task 2. Well Drilling: A California licensed well driller approved by the (SJCEHD) <br /> will drill three soil boring at the locations shown on Figure 2. The well <br /> borings will be drilled with eight-inch diameter hollow-stem augers. <br /> These borings will extend to 10 feet below first encounter groundwater <br /> assumed to be at approximately 10 feet bgs. A GSI geologist will <br /> supervise the drilling activities and prepare a log of each boring. Soil <br /> samples for description and possible chemical analysis will be collected <br /> at five-foot intervals. Soil samples will be handled as described in <br /> Attachment A. Soil samples selected for analysis will be analyzed as <br /> described in Task 3. Based on available site data, we anticipate 1 soil <br /> samples per boring will be submitted for chemical analysis. <br /> Groundwater Monitoring Well Construction: Groundwater monitoring <br /> wells will be constructed of two-inch-diameter polyvinyl chloride (PVC) <br /> casing. The screened interval will consist of 0.02-inch, machine-slotted <br /> well screen, and will extend approximately two feet above first <br /> encountered groundwater to accommodate fluctuations in groundwater <br /> levels. The annular space around the well screen will be backfilled with <br /> Lonestar #3 sand to approximately one foot above the top of the well <br /> screen. A one-foot-thick bentonite seal will be place above the <br /> sandpack, and the annular space then backfilled with neat cement. The <br /> proposed well construction detail is presented in Figure 3. <br /> Well Development and Sampling: After the well seals have been <br /> allowed to cure for a minimum of 48 hours, the newly installed <br /> monitoring wells will be developed. Development will remove sediment <br /> which accumulated in the well during installation and improve hydraulic <br /> communication between the well and aquifer. Well development water <br /> will be stored onsite in drums pending disposal. The wells will be <br /> a we t an or 24 hours after development, and the groundwater <br /> samples will be collected from each well. Well development and <br /> sampling procedures are presented in Attachment A. Groundwater <br /> samples will be analyzed as described in Task 3. <br /> Report No, 6146.701-1 <br /> 3 <br /> GeoStrategies Inc. <br />