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14 November 2014 AGE Project No . 07-1529 Page 5 of 6 format acceptable to the EHD and CVRWQCB , and will be reviewed and signed by a �i California Professional Geologist. i. FIELD PROCEDURES All field procedures will be overseen by an AGE representative under the supervision of a California Professional Geologist. Procedures for the well installation and completion , soil sample collection and analysis , well development and well sampling , and ISCO injections are described below. BORING ADVANCEMENT Utilizing a truck- or track-mounted , hollow-stem drill rig equipped with 8. 25-inch diameter hollow-stem augers , two pilot borings will be advanced to 55 feet bsg (shallow monitoring) and three pilot soil borings will be advanced to a depth of approximately 120 feet bsg (deep injection [2] and monitoring [1 ]) . Soil samples will not be collected during the installation . WELL COMPLETION The pilot soil borings will be completed as shallow and deep monitoring and deep injection wells utilizing two-inch diameter, Schedule 40 PVC blank well casing and 0 . 020-inch slotted well screen . For shallow wells screen will be installed from 40 to 55 feet bsg ; for deep wells screen will be installed from 100 feet to 120 feet bsg . Diagrams of the proposed wells are depicted in Figures 7 and 8. After installing the well casing in each pilot boring , a filter pack material consisting of pre-washed #3 Lonestar sand will be added through the augers from total depth to approximately two feet above the screened interval . Following placement of the filter pack, the well will be surged to assist in settling the filter pack. Additional sand will be added if settling occurs. A three-foot bentonite seal will be placed above the filter pack to minimize the potential for grout penetration into the screened section of the wells . The bentonite seal will be formed by pouring bentonite pellets into the annulus and allowing them to settle on the filter pack. The bentonite pellets will be allowed to hydrate for the duration of time specified by the manufacture , prior to grouting . The remaining annular space will be filled to within one foot of the ground surface with a cement grout. The grout mixture will consist of Type 1/11 Portland neat cement and not more than 6 gallons of water per 94- pound sack of cement. The grout will be placed by pumping through a tremie pipe or Advanced GcoEnvironmental, Inc.