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California Regional Water Quality Control Board <br /> Central Valley Region <br /> Karl E.Longley,ScD,P.E.,Chair ' <br /> Linda S.Adams Arnold <br /> Secretary for Sacramento Main Office Schwarzenegger <br /> Environmental 11020 Sun Center Drive 4200,Rancho Cordova,California 95670-6114 <br /> Protection <br /> Phone(916)464-3291•FAX(916)464-4645 Governor <br /> http://www.waterboards.ca.gov/centralvaUey <br /> 25 March 2008 <br /> Mr. Cecil Dillon Mr. Richard Bokides Mr. Navtej Dhingsa <br /> Flag City Ltd. Partnership Bokides Family Ltd. Partnership First Investment Flag City, Inc. <br /> 1820 W. Kettleman Lane P.O Box 1411 5517 Coronawood Lane <br /> Suite E Woodbridge, CA 95258 Carmichael, CA 95608 <br /> Lodi, CA 95242 <br /> WORKPLAN APPROVAL GRANTED TO DECOMMISSION WELLS <br /> FLAG CITY CHEVRON, 6421 CAPITOL AVENUE, LODI, SAN JOAQUIN COUNTY <br /> CLEANUP AND ABATEMENT ORDER NO. 5-00-700 (LUST CASE#390782) <br /> 1 reviewed the Monitoring Well Destruction Work Plan (Workplan) received 19 March 2008 from <br /> Advanced GeoEnvironmental (AGE), the consultant for the Bokides Family Ltd. Partnership. <br /> The Workplan was written in response to the 27 June 2007 Central Valley Regional Water <br /> Quality Control Board (Regional Board) staff directive letter, which stated that "...Prior to <br /> (LUST Case No. 390782) closure, all wells that were installed as a result of the investigation <br /> and remediation shall be properly decommissioned, or transferred to other parties for their <br /> investigations." Figure 2 (enclosed) shows the locations of all Flag City Chevron wells and their <br /> proposed fate (destruction or transfer to New West Petroleum). Figure 2 also shows wells <br /> installed for the neighboring investigation at the 3 B's Truck Stop, which is ongoing and not <br /> affected by this Workplan. An electronic copy of the Workplan may be downloaded from the <br /> Internet at <br /> https://geotracker.waterboards.ca.gov/reports/electronic submittals asp?global id=T060770061 <br /> 5&sub type=GEO REPORT&assigned name=MAINSITE . <br /> The Workplan also includes a copy of the San Joaquin County Environmental Health <br /> Department (SJCEHD) well destruction variance letter (Letter) September 2007 for <br /> decommissioning the Continuous Multichamber Tubing (CMT) wells at your site. The SJCEHD <br /> issues permits for installation or destruction of wells in that county, and provides inspection for <br /> the grouting of said wells. <br /> A CMT well, when viewed in cross section, is arranged as a single cylinder with six circular <br /> continuous chambers surrounding a seventh circular center continuous chamber, patterned <br /> similar to a hexagon with a central core W . During well construction, individual tubes are cut <br /> open and plugged at predetermined depths while the cylinder is stretched out at surface. The <br /> CMT cylinder is inserted into the open boring, and the well is completed by adding alternating <br /> lifts of filter pack sand and bentonite grout to achieve multiple screen zones in a single <br /> completion well. Due to the soft polyethylene tubing used in the manufacturing of the CMT well <br /> casing, the small diameter of the seven chambers, and the preexisting bentonite grout used <br /> California Environmental Protection Agency <br /> �'s Recycled Paper <br />