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Tri-Valley Growers March 25, 1987 <br /> -Page 3 of 10 Quote No. 6225G <br /> Task 2.3 Monitoring Wells <br /> Three (3) groundwater monitoring wells will be constructed in the <br /> exploration borings. All monitoring wells will be built under permit <br /> requirements of the Sari Joaquin County Health Department. The wells will <br /> be constructed of 2 inch flush threaded PVC pipe; no glues or solvents will be <br /> used. After drilling the boring to the desired depth the PVC casing will be <br /> installed through the hollow stem. The auger will then be removed and the <br /> natural formation used to form the sand pack. The sand pack will be <br /> installed to a level approximately one to two feet above the slotted screen <br /> section where bentonite will be used as a seal. The remaining portion of the <br /> annular space will be sealed with a neat cement and bentonite grout. The top <br /> of the well will be set in a traffic rated box at grade with an internal <br /> locking cover to provide security. County regulations require that a County <br /> Inspector be on site to observe the placement of the well seals. The County <br /> will bill the Client for the Inspectors time at a rate of $35.00/hour. This fee <br /> is in addition to the prices listed herein. <br /> Task 2.4 Well Qgvelopment <br /> After construction, the wells will be developed to improve the hydraulic <br /> conductivity between the wells and the natural formation. The development <br /> will consist of manually bailing or mechanically pumping to remove residual <br /> silts and clays left from the drilling operations. At least ten (10) well <br /> volumes of groundwater will be removed. After development, the well will <br /> be allowed to recharge for approximately 24 hours, enabling Exceltech to <br /> collect a representative water sample and to measure the thickness of any <br /> floating product. Any contaminated water resulting from the development of <br /> the wells will be placed in drums (provided by the Client or available from <br /> Exceltech at extra cost). It shall be the responsibility of the Client to <br /> properly dispose of any contaminated water. Exceltech can assist the client <br /> in the disposal of any contaminated material on a time and material cost <br /> basis. <br />