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f <br /> California Fuels Station Page 2 <br /> 2402 Pacific Avenue July 20, 2012 <br /> Stockton California 95204 <br /> limits may be destroyed by pressure grouting from the bottom upward, while leaving the <br /> well casing in place. The top three feet or more of the well shall be drilled out with an <br /> auger that is at least one foot larger in diameter than the auger originally utilized to <br /> install the well, and the soil around the cut-off casing removed to a depth of an <br /> additional six inches below the new `top' of the cut-off casing. The grout sealant shall <br /> spill out of the top of the well casing to form a mushroom cap seal, with at least 12 <br /> inches of neat cement grout poured 6 inches above and 6 inches below the top of the <br /> cut-off casing. <br /> • EHD records indicate the presence of `nested' wells [AW1(A-B) and AW2(A-B)] installed <br /> using ten-inch augers. The EHD has found destruction results of nested wells are best <br /> obtained when an auger larger than the original auger is used and centered on the <br /> deepest casing (which is off-center in the original borehole). The auger needs to be <br /> sized sufficiently to reach out and remove all well casings, screens, filter packs, and <br /> grout sealant installed during construction. <br /> • All groundwater displaced to the surface during grout installation shall be pumped out of <br /> the excavation to allow for the EHD inspection and verification that the well has been <br /> properly destroyed. Contaminated groundwater pumped out of the excavation shall be <br /> containerized for proper disposal. <br /> • This site has seven wells located off-site in the City right-of-way. Please submit a copy <br /> of the valid encroachment permit when submitting the EHD Well and Boring Permit <br /> Application form for these wells. <br /> After the EHD has approved the well destruction scope of work proposal, you may submit an <br /> EHD Well and Boring Permit Application form, Master File Record form, encroachment permit <br /> issued by the City of Stockton for wells located in the City right-of-way, and the appropriate fees <br /> for each parcel. The permit fee for the destruction of each well is $125, and the Inspection <br /> Activity fee is $375 per parcel. A review of the site records indicates that 15 monitoring wells <br /> [including multi-chamber tubing (CMT) well MW-13], 1 extraction well, 9 air sparge wells <br /> (including nested wells AW1 and AW2)and 7 vapor extraction wells currently are installed. A <br /> fee of$5,000.00 will be required for the well destruction permit. <br /> To determine the fees for nested wells (including AW1, AW2 and MW-13), each nested well is <br /> considered as one well for permitting and fee purposes. <br /> Please provide the EHD certification in writing that all record owners of fee title to the above <br /> referenced site have been notified of your request for closure. This is in accordance with <br /> Section 25297.15 (a) of the California Health and Safety Code. Submit a complete list of record <br /> owners of fee title and their mailing addresses to the EHD. A form has been enclosed for this <br /> purpose. <br /> If you have any questions, please contact Vicki McCartney at (209) 468-9852 or by email at <br /> vmccartney@sjcehd.com. <br />