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C <br />6. pH varies less than 0.2 pH units <br />7. Turbidity varies not more than 10% <br />3.04 WELL DEVELOPMENT RECORDS <br />A. Contractor shall submit to the Engineer in the writing the following well <br />development data for each well development. Submittal shall be made within <br />two business days of completing well development. Engineer may request any <br />iother data in the field. <br />1. Name of project, site, well identification number, date and time of <br />G. Contractor shall allow the Engineer to install hydrology meter during well <br />development. <br />equipment, bailer, and/or pump used during 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. <br />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 <br />times the water volume in the well prior to the start of purging plus three <br />times the volume of water added for purging and surging. <br />4. Temperature is consistent within 0.2 deg F, <br />5. Specific conductivity is consistent within ± 3 percent change in specific <br />conductance. <br />6. pH varies less than 0.2 pH units <br />7. Turbidity varies not more than 10% <br />3.04 WELL DEVELOPMENT RECORDS <br />A. Contractor shall submit to the Engineer in the writing the following well <br />development data for each well development. Submittal shall be made within <br />two business days of completing well development. Engineer may request any <br />iother data in the field. <br />Ci <br />5. Time spent developing the well by each method, to include typical pumping <br />rate, if pump is used in development. <br />6. Minimum purge volume <br />7. Amount of water purged. Provide physical character of water removed, to <br />include changes during development in clarity, color, particulates, and <br />odor. <br />8. Volume and source of water added to the well, if any. <br />San Joaquin County <br />Groundwater Monitoring Well Specifications 10 Public Works Dept <br />Solid Waste Division <br />1. Name of project, site, well identification number, date and time of <br />development and name of person developing the well. <br />2. Method used for development, to include size, type and make of <br />equipment, bailer, and/or pump used during development. <br />3. Depth to bottom of well pre and post development <br />4. Static water level before and after well development <br />Ci <br />5. Time spent developing the well by each method, to include typical pumping <br />rate, if pump is used in development. <br />6. Minimum purge volume <br />7. Amount of water purged. Provide physical character of water removed, to <br />include changes during development in clarity, color, particulates, and <br />odor. <br />8. Volume and source of water added to the well, if any. <br />San Joaquin County <br />Groundwater Monitoring Well Specifications 10 Public Works Dept <br />Solid Waste Division <br />