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Nolte and Associates, Inc. •MONITORING WELLS d 616 MONITORING WELLS PART 1 - GENERAL 1.01 SCOPE This section specifies all work required to obtain necessary permits, drill bore hole, install casing and screen, develop, survey of well head, sample, and perform laboratory analysis of samples for two groundwater monitoring wells. The wells shall be located on the Franzia Winery wastewater disposal site at the locations shown on Figure 1 at the end of this section. Work to be performed shall be as follows: A. Drill and Log Monitoring Well Monitoring wells shall be drilled to a depth of 20 ft below the standing groundwater level at the well location (estimated total well depth 70 ft). The well will be logged by a registered geologist to be provided by the owner. Sieve analyses shall be conducted on selected formation samples as directed by the geologist. B. Install Casing and Develop Well Based on the well logs and sieve analyses, the Engineer will select a screen slot size. The Contractor shall install screen and casing, seal the well and develop the well. The Contractor will record well construction details on "as-built" plans, a copy of which will be given to the Engineer. C. Pump Testing and Sampling Water samples shall be collected from each monitoring well and shall be submitted for laboratory analysis after at least 2 hours of pumping at not less than 2 gpm, or until the water is free of turbidity, whichever takes longer. Approved sampling equipment shall be used to collect the samples. D. Survey of Well Heads Elevation of the top of the well casings shall be determined by registered surveyor provided by the Engineer. This elevation shall be the basis of determining the depth to groundwater. Surveyor will also determine horizontal position of wells. 1.02 PERSONNEL AND EQUIPMENT Monitoring well drilling shall be by conventional direct rotary drilling methods unless an alternate drilling method is approved by the Engineer. Drilling equipment shall be in good condition and of sufficient capacity to perform the work required by these Specifications. All drilling equipment; including mast and draw works, air compressors, drilling fluid pumps, drill pipe, etc. must be of the size, capacity, and condition to drill and set casing to required depths. Contractor shall furnish documentation regarding capacity of various components of the drilling equipment. Rigs shall be equipped with a weight indicator. 1