WORK PLANS_FILE 2 - Laserfiche WebLink

Home Browse Search

Mr. Frank Girardi Senior Reg istercd Environmental health Specialist Page 2 of 2 Pressure grouting was initiated on January 4, 2010, by Gregg Drilling and Testing of Martinez, California, under the oversight of URS Geologist, Matt Farris. San Joaquin County oversight was provided by Lori Duncan on ,January 4, and Frank Girardi on January 5. Pressure grouting was completed on January 5. At all eight wells grout pressure was maintained at 15 pounds per square inch (psi) for 5 minutes. Overdrilling followed by grouting of the remauiing five wells was initiated on January 6, 2010, and completed January S. Surface completion of the pressure-grouted wells was completed during the same time by excavating to a depth of five feet below ground surface, leaving approximately six inches of the PVC casing sticking up within the excavation. The casing was then topped off with grout which was allowed to overflow the casing, extending to a minimum of one foot beyond the casing laterally and six inches above the casing vertically, forming a "mushroom cap". The overdrilling and surface completion activities were observed by Frank Girardi of San Joaquin County on January 7, 2010. The excavations for the mushroom-capped wells were backfilled with clean fill on Monday, January 11, 2010. Soil cuttings and well debris generated during the well destruction has been placed in a lined rolloff bin for appropriate disposal following receipt of analytical results. It has been our pleasure to provide this report of well destruction. Please contact me at 916-679-2293, or via my cell phone at 916-512-8037 with any comments or questions. Very truly yours, URS CORPORATION Anthony Mindling, R.G. Senior Hydrogeologist Attachments: Attachment 1: Well Destruction Work Plan Attachment 2: Well Destruction Permit Application Approval C`UsersTor,y Doc,u eMs�URS iAFP�W ell oesvmOOT)Mel I'JestrUubon Repan'fRepon-R.FP-02.iioc