Laserfiche WebLink
i <br /> k: <br /> ;k <br /> I <br /> 83 WEST MARCH LANE <br /> I. SUITE 12 <br /> STOCKTON,CA 95207 <br /> PHONE:(209)476-1635 <br /> M"GERS DESIGNERS/CONSULTANTS July 18, 1989 <br /> Mr. Richard Callistro <br /> Capital Project Division <br /> San Joaquin County <br /> 222 E. Weber Ave. <br /> Courthouse, Room 670 <br /> Stockton, CA� 95202 <br /> Dear Mr. Callistro, <br /> At the request of the San Joaquin County Captial Project <br /> Division, ROY1F. WESTON, INC. (WESTON) will abandon monitor well <br /> MW-1 by removal or destruction. The resultant borehole will be <br /> filled with grout. The abandonment of MW-1 is necessary because <br /> as presently located the well interferes with the planned <br /> construction of the new Human Services Building for San Joaquin <br /> County at this site. Figure 1 and Figure 2 depict the site and <br /> monitor well location. <br /> k <br /> The actual abandonment will be accomplished in one of two ways. <br /> 1. Initially, an -.attempt will, be .made to -remove the PVC casing <br /> intact by .pulling it from .the ground. If the casing can <br /> indeed ,be pulled intact from the ground, .the hole will then <br /> -be .-grouted from the .bottom .up using a 5% .bentonite cement <br /> grout °.pumped Into .place through a trim line. <br /> I <br /> 2. If the PVC casing cannot be removed intact, the well will be i <br /> drilled 'out using a 10 inch hollow stem auger. This <br /> drilling . procedure will completely destroy the PVC well <br /> casing. A set of AW rods will be placed within the well <br /> casing and will act as a centralizer thus ensuring that the <br /> destruction is complete and that the drill hole does not <br /> deviate from the well. The borehole will be grouted as <br /> described above, using a 5% bentonite cement grout pumped <br /> into place through a trim line. Grout placement will be <br /> done under the supervision of a San Joaquin County <br /> Environmental Health Inspector. <br /> I <br /> Sincerely, <br /> ROY F. WESTON, INC. <br /> Jeffrey F. Herrick <br /> Associate Geologist <br /> JFH/akw <br /> k <br />