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- <br /> All <br /> Harry's Auto Page 2 <br /> 2662 North Wilson Way January 31, 2014 <br /> Stockton, California 95205 <br /> Concurrent with the public participation period, please provide the EHD certification in writing <br /> that all record owners of fee title to the above-referenced site have been notified of your request <br /> for closure. This is in accordance with Section 25297.15 of the California Health and Safety <br /> Code. Submit a complete list of record owners of fee title and their mailing addresses to the <br /> EHD. A form has been enclosed for this purpose. Please submit the information by 3 March <br /> 2014. <br /> During the sixty-day public participation period, it is necessary to plan and prepare to execute <br /> the destruction of all wells installed as part of your site investigation and remedial action so that <br /> once responses received during the sixty-day public participation period have been properly <br /> addressed, well destructions can commence. <br /> Please submit a scope of work proposal that details the conditions and construction of the wells <br /> and the methods and materials to be used to destroy them. To be issued a well destruction <br /> permit,.the proposal must address the concerns of the EHD and the San Joaquin County Well <br /> Standards requirements, such as: <br /> • Wells that have laboratory data from the last sampling event that demonstrate the presence <br /> of any contaminants of concern remaining in groundwater are to be destroyed by removing <br /> all the contents of the well (well casing, screen, filter pack, grout sealant); the cleared <br /> borehole is then to be sealed with neat cement from the bottom upward to the depth of three <br /> to five feet below grade. <br /> • All wells with unknown construction and/or located in an area of known or suspected <br /> contamination are to be destroyed by removing all the contents of the well (well casing, <br /> screen, filter pack, grout sealant); the cleared borehole is then to be sealed with neat <br /> cement from the bottom upward to the depth of three to five feet below grade. <br /> • Wells that have laboratory data from the last groundwater sampling event that report non- <br /> detectable concentrations of contaminants of concern and with acceptable laboratory <br /> detection limits, and are not in areas of known or suspected soil contamination, may be <br /> destroyed by pressure grouting form the bottom upward, while leaving the well casing in <br /> place. The top three feet or more of the well shall be drilled out with an auger that is at least <br /> one foot larger in diameter than the auger originally utilized to install the well, and the soil <br /> around the cut-off casing removed to the depth of an additional six inches below the new <br /> `top' of the cut-off casing. The grout sealant shall spill out of the top of the well casing to <br /> form a mushroom cap seal with at least twelve inches of neat cement grout poured six <br /> inches above and six inches below the top of the cut-off casing. <br /> • All groundwater displaced to the surface during grout installation shall be pumped out of the <br /> excavation to allow for EHD inspection and verification that the well has been properly <br /> destroyed. Contaminated groundwater pumped out of the excavation shall be containerized <br /> for proper disposal. <br /> • This site has several wells located off-site in the City of Stockton right-of-way. Please <br /> submit a copy of the valid encroachment permit when submitting the EHD Well and Boring <br /> Permit Application form for these wells. f <br />