WORK PLANS - Laserfiche WebLink

Home Browse Search

MMAG E ENVIRONMENTAL,INC. 465 S.Meadows Pkwy,Ste.20 PMB 157 Fq� V 89521 C `V -{I,� 1851-7239 Fax(775)851-7240 SEP 1 9 2008 September 19, 2008 ENVIR )ivi`l E l`� HEALTH PERMt'i;SERVICES ,J aw Ms. Vicki � McCartney, Sr. R.E.H.S. San Joaquin County EHD 600 East Main Street Stockton, CA 95202-3029 Re: Letter Work Plan—Destruction of Groundwater Monitoring Wells San Joaquin County Courthouse, 222 E. Weber Avenue, Stockton, California EHD Site Code: 1285, USTCF Claim#15630, Global ID#T0607700470 Dear Ms. McCartney: On behalf of the San Joaquin County Facilities Management Department, Ramage Environmental, Inc. is pleased to submit to the San Joaquin County EHD this work plan to destroy the three groundwater monitoring wells at the above-referenced site. On September 10, -- 2008, EHD requested this work plan. The locations of the three monitoring wells (MW-1, MW-2 and MW-3) are shown on the attached site plan. Prior to destroying the wells, Ramage Environmental will obtain a permit from EHD. Since all three of the monitoring wells are on the subject site, neither private property access agreements nor encroachment permits are required. At least two working days prior to destroying the wells, Ramage Environmental will contact EHD and Underground Service Alert (USA) so that regulatory and underground utility clearance inspections can be scheduled. Given the county court operations at the site, the field work will be conducted on a Saturday. The work is currently scheduled for Saturday,November 8, 2008. The three monitoring wells will be destroyed by a C-57 licensed drilling contractor(i.e., driller), under the supervision of Ramage Environmental and inspection of EHD. All three monitoring wells are 2-inch diameter and are installed in 8-inch diameter boreholes. The wells all include 20 feet of polyvinyl chloride (pvc) well screen and blank pvc casing. Monitoring wells MW-1 and MW-2 are 25 feet deep, and MW-3 is 35 feet deep. The monitoring well logs are attached. The driller will destroy the wells by over-drilling the boreholes and casings with a truck-mounted drilling rig and 10-inch diameter hollow-stem augers. Once all of the well materials have been removed, the driller will seal the resulting boreholes by filling them with neat cement grout, placed to the bottom of the boreholes with a tremie pipe. The driller will cap the cement-filled boreholes with six-inch layers of concrete or asphalt to match the surrounding pavements.