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Former Manna Pro Site Page 2 <br /> Quarterly Groundwater Monitoring Report <br />' Project No 207 2 <br /> December 11, 2001 <br />' Later, Groundwater Technology Inc (GTI) installed four additional monitoring <br /> wells, a combination groundwater/vapor extraction well and three observation <br /> wells These wells were used for the completion of groundwater pumping and <br />' vapor extraction pilot tests <br /> Between 1996 and April of 2000, the principal remedial activity consisted of <br />' groundwater monitoring In April of 2000, a deep monitoring well (MW-11) <br /> was constructed to characterize the vertical distribution of hydrocarbons in the <br />' subsurface At the same time, a new vapor extraction well and an air sparge <br /> well were constructed as part of a pilot remedial test program The <br /> construction of MWD-11 was documented in the quarterly monitoring report <br />' for the spring 2000 monitoring event The results of the pilot test were <br /> documented in the July 31, 2000 report entitled Report, Remedial Action Pilot <br /> Study, Former Manna Pro Site To date, a total of 11 groundwater monitoring <br />' wells, 5 observation wells, and three test wells have been constructed on or <br /> near the Manna Pro site The San Joaquin County PHS-EHD recently <br /> concluded that the release at this site has been adequately characterized and <br />' directed that a Corrective Action Plan be prepared and submitted for approval <br /> The Corrective Action Plan dated February 16, 2001 has been approved and <br /> the first phase of the system has been constructed This entailed the <br /> construction of one new air-sparge well, and the installation of vapor <br /> extraction and air sparge equipment as well as associated electrical equipment <br /> and pipe runs <br /> 1.2 Scope of Work <br /> The following work was completed during this round of groundwater <br /> monitoring <br />' 1 The depth to groundwater was measured in 10 monitoring wells, and 3 <br /> observation wells located on, or near the site <br />' 2 Groundwater monitoring included sample collection and subsequent <br /> laboratory analysis from 6 monitoring wells <br /> 1 <br />' 2937 Veneman Ave ,#B240 Geo-Phase Environmental Inc Phone (209) 569-0293 <br /> Modesto, CA 95356 Fax (209) 569-0293 <br /> t <br />