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i PORT OF STOCKTON Phone: (209)946-0246 -ItFax: (209)465-7244, 04��0 April 28, 2000 Transmitted Via U.S. Mail Ms- Carol Oz, REHS Senior Environmental Health Specialist San Joaquin County Public Health Service Environmental Health Division 1 304 East Weber Avenue, Third Floor Stockton, California 95202 RE: Well Destruction Workplan for Site No. 5, 1237, Port of Stockton Dear Carol: In response to your letter, dated April 24, 2000,to Mr. Jay Jahangiri, Director of Environmental and Regulatory Affairs Department, the Port of Stockton (Port) is pleased to submit the enclosed Permit Application, Well Detail Farms, Well Abandonment Logs, as well as a site map. This information is included to serve as a workplan for destruction of the three monitoring wells designated MW5-1, MW5-2 and MW5-3. All wells shall be destroyed in a manner which will not produce water, act as a conduit for the interchange of water, or present a hazard to the safety and well being of people and or animals. Upon approval by San Joaquin County Public Health Service, Environmental Health Division (PHS/EHD),the following procedures will be employed in the field: 1- A C-57 licensed contractor will be hired to perform the work. In our telephone conversation of April 26, 2000, you indicated that V&W Drilling, is very familiar with the destruction standards of San Joaquin County PHS/EHD. I 2. The work schedule will be coordinated by the Port with for the designated contractor to perform the work. The Port will also coordinate with PHS/EHD to inspect the procedures to its satisfaction. 3. Total depth of each well will be sounded with a weighted tape measure and compared to the depth recorded on the original boring logs created on May 17, 1999. Total volume of each 2- inch diameter well has been calculated by multiplying the total depth by the factor 0.17 gallons per foot(correlation for 2-inch diameter wells). 25 feet times 0.17 gallons per foot yields 4.25 gallons per well of neat cement. 4. A tremmie pipe or hose will be put down the well until it rests less than 5-feet off the bottom, to assure that no bridging of the cement occurs. ust-sites well destruction worlpten.doc F7ost Office BOX 2080 • Stockton, CA • 05201-2080 • E-mail: porlmaiWDstocktonporl,com Administration Office: 2201 -Vest xvasE-)ington Street . Stockton. CA • 95203 • W-b 1'age:w"w.portofstockton.com