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4 2. GENERAL REQUIREMENTS 2.1 SCOPE OF WORK A. Purpose— One, triple completion monitoring well will be drilled, constructed, and developed as part of the project. Minimum 8 3/,-inch diameter test hole shall be drilled site at the site which shall serve to evaluate the lithologic character of subsurface formations and aquifers at the site to determine characteristics of the aquifer materials through geophysical surveys and measurements. The monitoring wells will be used to sample ground water and measure water levels at selected depth horizons. The individual piezometers monitoring test hole depth and preliminary monitoring piezometer depths are summarized below. Borehole Well Depth Piezometer Casing Screen Interval ft Depth (ft) (ft) MW 190 195 180-190 Site 21 MW 300 MW 250 255 240-250 MW 290 295 280-290 B. Test Hole Drilling and Well Construction 1. The Work to be completed under this Contract will consist of furnishing all materials, labor, equipment, fuel, tools, transportation and services for the drilling, sampling and logging of test holes at selected sites. The test holes shall be converted to permanent monitoring wells and one extraction well. In the event that the Owner does not elect to convert a test hole to a well,the test hole shall be destroyed in the manner specified herein. 2. The project site is located in San Joaquin, County, CA. 3. The maximum anticipated test hole depth is 300 feet. The actual depth of the test hole will depend on the lithology encountered. A driller's log will be prepared to describe the lithology encountered during drilling. The contractor will collect samples of drill cuttings. The test hole shall be geophysically logged. 4. The minimum diameter of the test hole is 8 '/-inches. The contractor may drill a larger diameter test hole at his own expense. 5.The final design for the monitoring wells will be prepared by the Engineer after evaluating the test hole data. 6. Cuttings, drilling fluids, and development water shall be completely contained. Contractor shall take care and employ all reasonable measures to prevent fluids from leaving work area and/or entering storm water systems. The Contractor shall take full ownership of drill cuttings generated from drilling operations and be responsible for handling and proper offsite disposal. Transportation and disposal costs shall be the responsibility of the Contractor.