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Former Manna Pro Site Page 2 ' Quarterly Groundwater Monitoring Report Project No 207 2 . July 11, 2001 ' wells, a combination groundwater/vapor extraction well and three observation wells These wells were used for the completion of groundwater pumping and vapor extraction pilot tests Between 1996 and April of 2000, the principal remedial activity consisted of ' groundwater monitoring In April of 2000, a deep monitoring well (MW-11) was constructed to characterize the vertical distribution of hydrocarbons in the subsurface At the same time, a new vapor extraction well and an air sparge well were constructed as part of a pilot remedial test program The construction of MWD-11 was documented in the quarterly monitoring report for the spring 2000 monitoring event The results of the pilot test were ' documented in the July 31, 2000 report entitled Report Remedial Action Pilot Study Former Manna Pro Site To date, a total of 11 groundwater monitoring wells, 5 observation wells, and three test wells have been constructed on or near the Manna Pro site The San Joaquin County PHS-EHD recently concluded that the release at this site has been adequately characterized and ' directed that a Corrective Action Plan be prepared and submitted for approval The Corrective Action Plan dated February 16, 2001 has been approved and preliminary work has begun to implement the plan • 1.2 Scope of Work The following work was completed during this round of groundwater monitoring 1 The depth to groundwater was measured in 11 monitoring wells, 5 observation wells and 3 service wells located on, or near the site ' 2 Groundwater monitoring included sample collection and subsequent laboratory analysis from 5 monitoring wells r i ' 2937 Veneman Ave #B240 - Ph 2 Geo Phase Environmental Inc one ( 09) 569-0293 Modesto, CA 95356 Fax (209) 569-0293