ARCHIVED REPORTS_XR0004864 - Laserfiche WebLink

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Task 5 - Reporting • Interpret all laboratory sample analyses and field data. • • Prepare site maps, and other documentation. • Prepare this report utilizing a California Registered Geologist in accordance with California ' State guidelines that resents all analytical data and interpretations, and recommendations for g P y rP further work, as appropriate. 3.0 SITE WORK PLAN The following sections describe the tasks conducted in the performance of the approved work plan. The scope of work was designed to meet the objectives for this phase of the project as outlined above. ' 3.1 Planning and Permits After approval by Western Refrigerating & Cold Storage Company representatives, the work plan and HASP were submitted to the PHSIEHD and the CRWQCB for their review and ' approval. Upon modification and approval by the appropriate agencies, monitoring well abandonment and soil aeration permits were obtained. Notification was made to Underground Service Alert (USA) to mark out all underground utilities in the vicinity of the excavation area ' under ticket number 205634. All overhead utilities or other obstructions were noted and referred to the excavation crew prior to initiating the excavation. 3.2 Monitoring Well Abandonment I Monitoring well MW-1 was located within the boundaries of the proposed soil excavation and required abandonment prior to excavation. Monitoring wells MW-2, MW-3, MW-4 and MW-8 were previously removed from the quarterly ground water sampling program and were also ' approved for destruction. Well destruction was performed by V & W Drilling, a California state licensed drilling contractor, in accordance with California water well standards as specified in document 74-90. ' Monitoring wells MW-1, MW-2, MW-3 and MW-4 were abandoned using a pressure grout method. A neat cement grout was installed from the surface using a tremie pipe inserted to the ' bottom of the well casing. The casing was grouted from its base to the surface. Pressure was applied-to the well casing to ensure that the well screen and sand pack were filled with grout. The well monuments were removed and the well collars were excavated approximately 12 inches below grade and native soil was placed into the hole after the cement grout had been allowed to set. Monitoring well MW-8 was destroyed by drilling out the entire cased length and grouting American Geological Services,Inc. CA95DE-029 5