Laserfiche WebLink
CLEARWATER <br /> G R O U P, I N C . <br /> Eiiviron metrtal Services <br /> December 5, 1997 <br /> Mr. Harlan Knoll <br /> San Joaquin County PHS/EHD . <br /> PO Box 388 <br /> Stockton, CA 95201-0388 <br /> PAYMENT <br /> Re: Workplan for Well Abandonment RIEC : <br /> 4555 North Pershing Ave. Stockton CA DEC 1.5 '�997 <br /> Dear Mr. Knoll, PUBLIC HAEOA TH COUNTY C9 <br /> ENVIRONMENTAL HEALTH W&ON <br /> This letter workplan for well abandonment is written in anticipation of a favorable response by the <br /> Regional Board and SJC PHS/EHD of our recent petition for closure of the referenced site. This <br /> workplan describes the work required to destroy and abandon 5 monitoring wells and 1 vapor <br /> extraction well, the final stage of site work required at this site. <br /> Scope of Work <br /> As specified above Clearwater intends to abandon 5 groundwater monitoring wells and 1 vapor <br /> extraction well. The monitoring wells are 2 inches in diameter and are between 40 - 42 feet in <br /> depth. The vapor well is also 2 inches in diameter and 28.5 feet in depth. The well abandonment <br /> work will be performed in accordance with state and county well abandonment and destruction <br /> procedures. Clearwater proposes to pressure grout these wells using a hollow stem auger drill rig <br /> and compressor system. A-bentonite grout seal will be injected into the well to approximately 5 <br /> feet below grade. The well casing from.5 feet below grade to the surface will be removed by <br /> overdrilling and filled to approximately b" to 12" below grade with the bentonite grout. The <br /> borehole will be finished with concrete to grade. <br /> Reporting <br /> The well abandonment work shall be documented in a letter report to your office The report shall <br /> contain a write up of the work performed and will describe abandonment methods and seals used. <br /> I <br /> 520 Third Street,Suite 104 & Oakland,California 94607 ♦ Telephone 510-893-5160 • Fax 510-893-5947 <br />