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04 May 2020 AdvancedGec4 04 May 2020 AdvancedGers <br /> An Fmpleyee4rmrd(nnpnn) MFmploymOmeOGmpany <br /> Project No. 16.2934 Project No.16-2934 <br /> Page 2 of 3 -`�IN Page 3 of 3 �. <br /> Environmental Protection Agency,1985).Priorto drilling activities,each proposed drilling If you have any questions or require further information, please contact our office at <br /> location will be clearly marked, and utility clearance obtained through Underground (209)467-1006. <br /> Service Alert.A well abandonmentldestruction permit will be obtained from the SJCEHD; <br /> additionally,an encroachment permit will be obtained from City of Stockton Public Works <br /> Department (CSPWD) to conduct work in the city right-of-way (i.e. wells MW-2 and Sincerely, <br /> MW-3). Both the SJCEHD and the CSPWD will be notified a minimum of 48-hours prior <br /> to commencement of well destruction activities. AdvancedGeo, Inc. n-*-4':Q1 <br /> usinga <br /> welldestruction activities,allwellswill bechecked fortotinthealtlepth andwellintegrityllnP.r�-v �'using a Solinst water level meter.Any obstructions found in the well vnll be removed. <br /> AGI is proposing to destroy wells MW-1 though MW-3 by removing all material within the Timothy . Cu ar Brian W. Millman <br /> original boreholes utilizing over-drill techniques.The abandonment of these wells will be Senior eolo ist Senior Geologist <br /> performed utilizing a truck-mounted CME 75 high torque mobile drill rig.All three wells Cafdomia Professional Geol 0.8574 <br /> will be drilled out to one foot deeper than the total depth of the wells utilizing 8.25-inch <br /> diameter hollow stem augers. All original well construction materials will be removed <br /> (including well casing,screen,filter pack,and annular sea[) by the drill rig to ensure that <br /> no residual contamination is sealed within the abandoned borehole and a filter pack does <br /> not remain to act as a vertical conduit. <br /> All three excavated borings will be completely balled to surface grade with a cement <br /> grout mixture (Portland type Ip and covered with either a concrete or asphalt cap, <br /> depending on the surrounding surface material. The grout mixture will consist of a ratio <br /> of six gallons waterfor every 94pound sack of Portland type II cement The drill rig hollow <br /> stem augers will be utilized as a tremie pipe for the grout seal. <br /> Rinseate, soil cuttings, well materials and construction waste generated during drilling <br /> and decontamination activities will be containerized in properly labeled Department of <br /> Transportation (D.O.T.)-approved 55-gallon drums and stored on-site until proper <br /> disposal is arranged to a suitable non-hazardous waste facility. <br /> 3.0. REPORTING <br /> Upon completion of field work and disposal of rinseate and soil cuttings,a well destruction <br /> report describing all well destruction activities and procedures, including documentation <br /> of waste disposal, will be prepared and submitted to both the SJCEHD and the <br /> CVRWQCB.The report will be in a format acceptable to the SJCEHD and the CVRWQCB <br /> and will be reviewed and signed by a California Professional Geologist III <br />