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i Raymond Investment Corporation Page 2 730 Channel Street February 1, 2013 Stockton, Califomia 95202 directs that 25 pounds per square inch (psi) of liquid grout pressure be applied for a minimum of ten minutes. Following the pressure grouting, a hole at least one foot larger diameter than the originally drilled hole must be excavated around the outside of the well casing to a depth of k three feet bsg. The well casing must then be cut off six inches above the bottom of the excavation and removed. The grout used to fill the well must then be allowed to spill over into the excavation and fill the hole for a thickness of one foot and form a cap which has a diameter at least one foot greater than the diameter of the originally drilled hole. (If augers are used to excavate the top three feet, the augers must be at least twenty inches in diameter for wells that were installed using eight-inch augers.) The remaining wells (MW-2, MW-4, MW-4D, MW-5 and MW-6) have either' impacted groundwater or are located in an area of known or suspected contamination. These wells must be over-drilled to total depth and the well contents removed prior to grouting from the bottom upward to a depth of three to five feet bsg using a tremie pipe. The EHD approves over-drilling the three soil vapor wells using a four-inch hand auger as proposed by Condor. With these conditions the EHD approves the work plan to destroy the wells at this site. Please submit a copy of the encroachment permit issued by the City of Stockton, the Well and Boring Permit Application for the well destructions, Master File Record form and appropriate fees for each parcel. The permit fee for the destruction of each well is $125.00, along with-a $375.00 Inspection Activity fee per parcel. Since 11 wells currently are installed on two parcels, a fee of $2,125.00 will be required for the well destruction permits. Please provide the EHD certification in writing that all record owners of fee title to the above- referenced site have been notified of your request for closure. This is in accordance with Section 25297.15 of the California Health and. Safety Code. Submit a complete list of record owners of fee title and their mailing addresses to the EHD. If you are the sole landowner, provide a statement to this effect to the EHD. 'A form has been enclosed for this purpose. Submit future correspondence and permits to our new location at 1868 East Hazelton Avenue, Stockton, California 95205. If you have any questions concerning this letter,'please contact Vicki McCartney at (209) 468- 9852, or by email at vmccartney@sjcehd.com. Sincerely, i Victoria L. McCartney, RENS Nuel Henderson, PG Senior Registered Environmental Health Specialist Engineering Geologist c: Mr. Bill A. Cook III, PG, Condor Earth Technologies, Incorporated, 188 Frank West Circle, Suite 1, Stockton, California 95206 Mr. James L.L. Barton, PG, California Regional Water Quality Control Board Central Valley Region, 11020 Sun Center Drive, Suite 200, Rancho Cordova, California 95670 i