SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

Three Palms Grocery Page 2 of 3 6732 East Highway 88 July 15, 2014 Stockton, California 95205 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 the 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. To expedite the process of closing this site, the EHD has omitted the need to submit a well destruction work plan. In place of the work plan, the EHD directs that a well destruction permit application be submitted to this agency that includes the proposed method to destroy each well. The EHD will review the well destruction proposal submitted on the permit application/s and if the proposed well destruction method does not meet the San Joaquin County Well Standards, the permit application/s will be revised by the EHD and the permit/s will be issued, contingent upon the modifications made on the permit application by the EHD. Compliance with the San Joaquin County Well Standards requirements includes: • 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 (except steel conductor casing), screen, filter pack, grout sealant]; 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 (except steel conductor casing), screen, filter pack, grout sealant]; 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 areas of known or suspected soil contamination, may be destroyed by pressure grouting form the bottom upward, while leaving the well casing in place. [At least 25 pounds per square inch (psi) of liquid grout pressure must be applied for at least ten minutes.] The top three 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. Submit an EHD Well and Boring Permit Application form along with a Licensed Contractor's Declaration form and appropriate fees for each parcel. The permit fee for the destruction of each well is $125, along with a $375 Inspection Activity fee. A review of the site records indicate that ten wells (5 monitoring wells and 5 vapor extraction wells) currently are installed at this site. A fee of $1,625.00 (10 x $125 + $375) will be required for the well destruction permit. (Please note that on 01 August 2014, the EHD fee-rate will increase to $130 per well; the total fee will be $1,675.00.) Once wells are destroyed, submit a brief well destruction report containing the