WORK PLANS FILE 2 - Laserfiche WebLink

Home Browse Search

II A q necessary because the groundwater had fallen below the depth of the original wells. This work was reported in our report dated April 30, 1992 , In July 1993 we installed two additional monitoring wells and drilled one boring . This work was reported in our report dated August 24, 1993, In September 1994, we installed three additional monitoring wells. This work was reported in our report dated October 10, 1994, In April 1995 we drilled two CPT borings and they were reported in our report dated March 15, 1995 , In February and March , 1996 five vapor extraction wells , one air sparging well and one boring were installed at this site. This work was reported in our report dated March 19, 1996, In April 1996 we drilled two additional CPT borings. They were reported in our report dated June 10, 1996, In July 1999 , we drilled an additional monitoring well MW- 12 to 80 feet. This was reported in our report dated August 5 , 1999. On November 6, 2000 we drilled two borings (B-2 and B-3) to a depth of 90 Feet Bgs and 100 Feet Bgs. This was reported on our report dated December 14 , 2000 . On November 17, 2003 , we submitted a Amended Site Concept Model. On July 20, 2005, we drilled one boring and two monitoring well (B-4, MW- 14 and MW- 16) to a depth of 158 feet bgs for the borings and 50 feet bgs for the two monitoring wells. This was reported in the drilling report dated August 24 , 2005, WORK PROPOSAL - Installation of Monitoring Wells / Confirmation of CPT Define Vertical Migration California Geophysical proposes to install two 2" PVC Monitoring Wells (MW- 17 and MW- 18) . They will be placed on the south side of Charter Way and west of Grant Street on site near boring 134, see the attached site map for location details . The area where these wells will be installed is level and stable. The surface area is either cement or asphalt with a engineered surface storm water drainage system . Careful consideration will be exercised in the placement of the wells due to the fact that this is a active gasoline station in full operation . The wells will be permitted through the City of Stockton and the San Joaquin County Environmental Health Department and will be installed only with their approval . The monitoring wells will be named MW- 17 and MW- 18 , respectively. They will be drilled via a truck mounted hollow stem auger to a depth of 180 vertical feet and will be screened from 170 to 180 feet bgs .