SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

i . M Former Circle K Store No . 08671 Page 2 of 3 8606 Thornton Road June 12 , 2015 Stockton , California 95209 California 95205-6232. Prior to distribution of the notification, please provide a copy of the draft letter to the EHD for review and comment along with the list of agencies and owners/occupants who will receive the public participation letter. An example letter is available from the EHD, if requested. The public will have sixty days to comment. During the sixty-day public participation period , it is necessary to plan and prepare to execute the destruction of all wells installed as part of your site investigation and remedial action so that once responses received during the sixty-day public participation period have been properly addressed, well destructions can commence. Please submit a scope of work proposal that details the conditions and construction of the wells and the methods and materials to be used to destroy them . To be issued a well destruction permit, the proposal must address the concerns of the EHD and the San Joaquin County Well Standards requirements, such as: • Wells that have laboratory data from the last sampling event that demonstrate the presence of any contaminants of concern remaining in groundwater are to be destroyed by removing all the contents of the well [well casing, screen , filter pack, grout sealant (except steel conductor casing) ; the cleared borehole is then to be sealed with neat cement from the bottom upward to the depth of three to five feet below grade. • All wells with unknown construction and/or located in an area of known or suspected contamination are to be destroyed by removing all the contents of the well [well casing , screen , filter pack, grout sealant (except steel conductor casing)]; the cleared borehole is then to be sealed with neat cement from the bottom upward to the depth of three to five feet below grade. • Wells that have laboratory data from the last groundwater sampling event that report non- detectable concentrations of contaminants of concern and with acceptable laboratory detection limits , and are not in an area of known or suspected soil contamination , may be destroyed by pressure grouting from the bottom upward , while leaving the well casing in place. The top two-and-a-half feet or more of the well shall be drilled out with an auger that is at least one foot larger in diameter than the auger originally utilized to install the well, and the soil around the cut-off casing removed to the depth of an additional six inches below the new `top' of the cut-off casing . The grout sealant shall spill out of the top of the well casing to form a mushroom cap seal with at least twelve inches of neat cement grout poured six inches above and six inches below the top of the cut-off casing . • All groundwater displaced to the surface during grout installation shall be pumped out of the excavation to allow for EHD inspection and verification that the well has been properly destroyed . Contaminated groundwater pumped out of the excavation shall be containerized for proper disposal . After the EHD has approved the well destruction scope of work proposal and the public participation comments have been properly addressed , you may submit an EHD Well and Boring Permit Application form for each parcel along with a Licensed Contractors' Declaration (LCD) , Encroachment Permit issued by the City of Stockton , Master File Record (MFR) form , and appropriate fees . The permit fee for the well destruction of seven onsite and three off-site monitoring wells , two soil vapor extraction wells, and eight oxygen injection wells is $ 1 , 040. 00.