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Addendum to Corrective Actio(,'Man Page 6 _ <br /> Former Manna Pro Site <br /> Project No. 207.3 <br /> February 10,2009 <br /> i <br /> 4.0 MONITORING WELL ABANDONMENT <br /> The following sub-sections ,describe the work to be completed to properly, <br /> abandon the groundwater monitoring well, MW-7. <br /> 4.1 Preparatory Work <br /> A permit .to abandon the well will be obtained from the San Joaquin County <br /> Environmental Heath Department(SJC-EHD)..,The well box protecting the well will be femoved; and the concrete collar will be broken <br /> out. <br /> 4.2 Pressure Grouting <br /> Pressure grouting is the appropriate method of abandoning the well. This work will be <br /> performed by' V&W Drilling (C-57 # 720904 or other suitable C-57 licensed well <br /> contractor). The following steps task will be performed to complete the well <br /> abandonment. <br /> �1 1. The lock and cap will be removed-from the well, and the well box removed. <br /> 2. Contract drilling personnel will prepare Class G neat cement for use as grout in <br /> pressure grouting the well. <br /> 3. The well will be :fitted with a:2-inch pressure cap. Neat cement will then be <br /> pumped into the well using a pneumatically actuated cement pump. Pumping will <br /> continued until a positive pressure of atleast 5 pounds per square inch is reached <br /> at the well head. The volume of grout pumped will be monitored to verify that the <br /> casing is full and the grout has squeezed through the slots and into the gravel <br /> pack.. <br /> 4.3 Finish Work <br /> After the well is grouted, the casing will'cut off 3 feet below grade and a mushroom <br /> shaped concrete cap will be .set over the casing stub. The remaining hole around each <br /> well head will be brought up to grade with soil. <br /> s 2937 Veneman Ave. #13240 Geo-Phase Environmental Inc. Phone 209 569-0293 <br /> Modesto,CA 95356 Fax(209)569-0295 <br />