WORK PLANS FILE 2 - Laserfiche WebLink

Home Browse Search

Mr.Michael Infurna,SJCEHD April 7,2006 Well Installation Work Plan Palisades Station No. 835,Stockton,CA Page 8 Preliminary Investigation and Evaluation of Underground Tank Sites, April 2004) and SJCEHD guidelines. A California-licensed C-57 well driller will perform all soil boring activities. A copy of Stratus' field practices and procedures that will be utilized during this work is provided in Appendix A. Task 1: Pre-field Activities Following approval of this Work Plan by SJCEHD personnel, the following activities will be completed: • Secure a revocable permit and an encroachment permit from the City of Stockton, • Obtain well installation permits from SJCEHD, • Retain and schedule a licensed C-57 drilling contactor, • Update the health and safety plan for the site, • Mark boring locations and contact Underground Service Alert to locate underground utilities in the vicinity of the work site, and • Notify SJCEHD, the City of Stockton, and Palisades of the scheduled field activities. Task 2: Field Activities Task 2A: Soil Borings A licensed well driller will advance the soil borings using a truck mounted drill rig equipped with 8-inch, 10-inch, and 15-inch diameter hollow stem augers. Each boring will be completed as a groundwater monitoring well, as described below. The initial 5 feet of each boring will be advanced with a hand auger and/or posthole digger to reduce the possibility of damaging underground utilities. Prior to the advancement of. borings MW-12, MW-13, MW-14, MW-18, MW-19, and MW-21 to total depth, 9-inch diameter steel conductor casing, connected using welded joints, will be installed in the borehole through 15-inch diameter augers. The conductor casing will be grouted in place using neat cement, and a minimum of 36-hours will be allotted for curing of the grout. Prior to further advancement of the conductor cased borings, residual groundwater situated inside of the conductor casing will be evacuated from the borehole to minimize the possibility of cross contaminating dissolved hydrocarbons during drilling. Soil samples will be collected at select intervals using a California-type, split-spoon sampler equipped with three pre-cleaned brass tubes. The ends of the bottom-most, intact tube from each sample interval will be lined with TeflonTm sheets, capped, and sealed. Each sample will then be labeled, placed in a resealable plastic bag, and stored in an ice- KAUSA Gasoline\0835\Work PlanApalisades835 workplan2006.doc STRATUS