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U <br />D. Contractor shall remove the PVC end caps from the top of the casing and then <br />install well plugs. <br />E. Contractor shall place coarse sand in the annular space between the enclosure <br />and the well casings. The sand shall be placed six inches below the top of the <br />well casings. <br />F. Contractor shall clean cement grout from the well casing and enclosure prior to <br />painting. <br />G. Contractor shall apply the final coat of paint on the enclosure and then shall label <br />the enclosure with the well No provided by the Engineer after installation . <br />H. Contractor shall install bollards plumb. <br />3.03 WELL DEVELOPMENT <br />A. Contractor shall verify if the well casing has not collapsed and that grout has not <br />intruded into the well. <br />B. Prior to development, the Contractor shall allow a minimum 48 hours for the neat <br />cement to set. <br />C. Contractor shall develop groundwater wells within 7 days of completion of that <br />well. <br />D. Well development shall be in the presence of the Engineer. <br />E. Contractor shall not damage the well casing during well development. <br />F. Contractor shall remove any tools or other parts dropped in the well casing. <br />G. Contractor shall allow the Engineer to install hydrology meter during well <br />development. <br />H. Contractor shall develop well using mechanical surging or over pumping or a <br />combination thereof per ASTM D 5521. Contractor shall purge the well until: <br />1. Well water is clear to the unaided eye. <br />2. Sediment in the well casing is less than 0.1 foot thick. <br />3. Water removed during surging and purging shall be a minimum of three times the <br />water volume in the well prior to the start of purging plus three times the volume <br />of water added for purging and surging. <br />FH -Groundwater Monitoring <br />Well Specifications 8/15/18 Page 8 of 12 San Joaquin County Public Works Dept <br />Solid Waste Division <br />