WORK PLANS - Laserfiche WebLink

Home Browse Search

• Health and safety plan 1.2 Proposed Monitoring Well Locations The monitoring wells are proposed to be constructed in the locations shown on the attached map. MW-1 and MW-2 are intended to represent the first groundwater condition in the Reserve Dispersal Area;MW-3 and MW-4 are intended to represent the first groundwater condition of the Primary Dispersal Area(See Groundwater Monitoring Well Locations). The quality of groundwater samples collected from the upgradient and downgradient wells, will be used to determine the baseline groundwater condition. The installation of each groundwater monitoring well will be carefully evaluated to assess borehole geology and water level measurements. This information will be considered when placing the remaining wells appropriately for the monitoring network. 2.0 DRILLING DETAILS This section provides a description of the equipment that will be used to construct the monitoring wells, along with associated drilling activities. 2.1 Drilling Equipment The wells will be drilled by Western Strata Exploration, Inc. using an all terrain truck mounted with a hollow-stem auger. The drilling contractor will be required to hold a valid Class C-57 California Contractor's License. A permit for installation of the wells will be obtained from the San Joaquin County Environmental Health Department. The County will also be contacted for the well seal inspection. The borehole will be drilled to a depth of approximately 50 feet, depending on the depth at which saturated soil conditions are first encountered. The well borehole will be approximately 6.0 to 10.0 inches in diameter, to allow for adequate space for the gravel pack and well casing. All cuttings will be disposed of by spreading onsite, as directed by French Camp. Drilling equipment will be washed at each monitoring well site to avoid cross-contamination. Well casings will be inspected to ensure they are clean when installed. 2.2 Well Installation Activities The drilling operation and logging activities are to be supervised by a Professional Geologist. No drilling mud or decontamination procedures are required for this site. Soil samples will be collected every five feet and will be logged based upon the Unified Soil Classification System (USCS). Collected information will include soil of rock type, color, grain size,hardness moisture and plasticity when appropriate. A well installation report will be included with the log and will show by depth the bottom of the boring, screen location, granular backfill, seals, grout, and height of protective casing above ground surface. The actual composition of the granular backfill, seal, and grout will be recorded French Camp-Monitoring Well Installation Workplan 2 SAB027100 September 2006 CADmuments and Settings\mlagorio\Local Settings\Temporary Internet Fi1es\OLK9F\Work Plan