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Page 3 of 6 <br />SOP IMBIBER 0.0 Well Development <br />(1) Well casing volume (gal) = Depth to bottom of well (ft) Depth to water level (ft) x 045 <br />(gal/ft) <br />(For a 2 -inch diameter well, replace 0.65 with 0.16; and for a 6 -much diameter well, replace 0.65 with 1.5) <br />All depth measurements are taken from the top of the inner well casing at the designated <br />measuring point. A weighted tape measure and electronic water -level indicator will be used to <br />determine the depth to bottom of the well and depth to water level. These procedures are <br />discussed in SOP No. ** Water - Level Measurements. <br />Field parameters including pH, temperature, conductivity, and turbidity will be measured after <br />each well casing volume has been evacuated. The calibration and operation of pH, conductivity <br />and turbidity meters is discussed in SOP No. ** Calibration of Field Instnunents. The well <br />will be developed until these field parameters have stabilized. Stabilized field parameters are <br />defined as three consecutive readings where temperatures are within 1 °C, pH readings are <br />within 0.2 units, and conductivity and turbidity values are within 10 %. If for any reason this <br />cannot be accomplished, the well will be considered developed after being purged of 10 well <br />casing volumes. <br />For slow producing wells (wells that do not fully recover within 8 hours), the wells shall be <br />purged dry a minimum of three times.. <br />All development equipment corning in contact with well water will be decontaminated in <br />accordance with SOP No. xK Decontamination, before each well is developed. Development <br />equipment will be protected from the ground surface with clear• plastic sheeting. <br />6.0 DOCUMENTATION <br />Documentation of observations and data acquired in the field mill provide information on the <br />activities concluded and also provide a permanent record of field activities. The observations <br />and data will be recorded with waterproof ink in a permanently bound weatherproof field <br />logbook with consecutively numbered pages, and on field data sheets. <br />6.1 WELL DEVELOPMENT RECORD <br />The following well development information will be recorded on the Well Development Form <br />included as Attachment A. <br />o Well I.D. and location <br />o Date of well installation <br />o Date and time of well development <br />o Static water level from top of casing before and after development <br />o Total depth of well from top of casing <br />o Quantity of water used during drilling <br />o Volume of well casing volume <br />o Field measurements of pH, conductivity, turbidity, and temperature taken after each well <br />casing volume has been evacuated <br />0 -3 <br />