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SOP No. 66.0 <br />Well Development <br />installation. A well casing volume is determined by the following formula for 4-inch diameter <br />wells: <br />(1) Well casing volume (gal) = Depth to bottom of well (ft) - Depth to water level (ft) x 0.65 <br />(gal/ft) <br />(For a 2-inch diameter well, replace 0.65 with 0.16; and for a 6-inch diameter well, replace 0.65 <br />with 1.48) <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. 6.0 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. 8.0 Calibration of Field Instruments. The well will <br />be developed until these field parameters have stabilized. Stabilized field parameters are defined <br />as three consecutive readings where temperatures are within 1 °C, pH readings are within 0.2 <br />units, and conductivity and turbidity values are within 10%. If for any reason this cannot be <br />accomplished, the well will be considered developed after being purged of 10 well casing <br />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. All purge water from the wells will be placed into an <br />appropriate container and handled as IDW as discussed in the SAP. <br />All development equipment coming in contact with well water will be decontaminated in <br />accordance with SOP No. 10.0 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 will 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 />• Well I.D. and location <br />• Date of well installation <br />• Date and time of well development <br />• Static water level from top of casing before and after development <br />• Total depth of well from top of casing <br />8/05/08 Page 3 of 5 R Squared Inc. <br />Attachment A