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April 2015 0 • <br /> AGE Project No. 14-3175 <br /> Page 2 of 3 <br /> Institute for Occupational Safety and Health Administration, U.S. Coast Guard and U.S. <br /> Environmental Protection Agency, 1985). Prior to drilling activities, each proposed <br /> location will be clearly marked and utility clearance will be obtained through <br /> Underground Service Alert. <br /> The required well destruction permits (attached) will be obtained from the SJCEHD prior <br /> to destruction activities. Before commencement of drilling, all wells will be checked for <br /> total depth and integrity using a Solinst water level meter. Any obstructions found in the <br /> well will be removed. <br /> Wells proposed for over drilling will be drilled-out to one foot deeper than their installed <br /> total depths (81 feet below surface grade [bsg; MW-11] and 14 feet bsg [MW-12 and <br /> MW-13]) utilizing 8-inch hollow stem augers. All original well construction materials will <br /> be removed (including well casing, screen, filter pack, and annular seal) to ensure that <br /> no residual contamination is sealed within the destroyed borehole. The boreholes will be <br /> backfilled to surface grade with neat portland cement and covered with concrete, <br /> asphalt, or native soil, depending on the surrounding surface material. <br /> Rinseate generated during drilling and decontamination activities will be containerized in <br /> properly labeled Department of Transportation (D.O.T.)-approved 55-gallon drums and <br /> soil will be contained in an onsite soil bin and both will be stored on-site until proper <br /> disposal is arranged to a suitable non-hazardous waste facility. Upon completion of field <br /> work and disposal waste, a report documenting the field activities and procedures, <br /> including documentation of waste disposal, will be prepared and submitted to the <br /> SJCEHD and the Regional Board. <br /> If you have any questions or require further information, please contact our office at <br /> (209) 467-1006. <br /> Sincerely, <br /> Oucl G <br /> Advanced GeoEnvironmenfal, Inc. of« Pt o LoF��<c <br /> m <br /> Q � N <br /> O <br /> No. 6709 v <br /> Daniel Villanueva Rob Loe er I 0 c^"` <br /> Project Geologist Vice President/Senlor roject Geologist <br /> Registered Geologist No. 6709 <br /> Cc: Mike Smith, California Regional Water Quality Control Board <br /> Mr. Alan Coon, Delta Farms Reclamation District <br /> Advanced GcoEnvironmental,Inc. <br />