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' San Joaquin County <br /> p P.Q•V N. <br /> DIRECTOR <br /> Environmental,.._ ..o Environmental Health Department <br /> z :2 1868 East Hazelton Avenue Donna Heran,REHS <br /> Stockton, California 95205-6232 PROGRAM COORDINATORS <br /> Robert McClellon,REHS <br /> -Jeff Carruesco,REHS,RDI <br /> Website: www.sjgov.org/ehd Kasey'Foley,REHS <br /> i F p R Linda Turkatre,REHS <br /> Phone; (209)468-3420 Rodney Estrada,REHS <br /> Fax: (209)464-0138 Adrienne Ellsaesser,REHS <br /> May 2, 2013 <br /> Mr. Ellis Cecchini <br /> Cecchini Cecchini& Giovannoni <br /> 3000 E. 18th Street <br /> Antioch, CA 94509 <br /> Subject: Cherokee Truck (former) CUF#: 8109 <br /> 3535 E. Cherokee Road ROM 01.18 <br /> Stockton, CA 95205 <br /> Dear Mr. Cecchini, <br /> The San Joaquin County Environmental Health Department (EHD) has received and reviewed <br /> Well Destruction Work Plan (WP) dated 08 April 2013, prepared and submitted on your behalf <br /> by your consultant,Advanced GeoEnvironmental, Inc. (AGE). <br /> In WP, AGE proposes to destroy seven wells (MW5NP1, MW-7, MW-8, MW-9, VW-1, VW-2 <br /> and VW-3)by removing the well contents by over-drilling the wells and grouting from total depth <br /> to the surface with neat portland cement, AGE proposes to destroy the other seven Wells <br /> .(MW-2, MW-3, MW-4, MW-6, SI-1, S1-2 and SI-3) by pressure grouting the wells utilizing a thick <br /> neat portland cement mixture, installing a pressure connection to the top of.the well casing and <br /> applying 25 pounds per square inch pressure for at.least. 10 minutes. The wells will then.be <br /> over-drilled to a depth of 3 feet below surface grade (bsg),.the casing removed six inches above <br /> the base of the over-excavation; and filling the excavation to a. foot -above the base-of the <br /> excavation making a mushroom cap over the casing, The remainder of the excavation to be <br /> filled with clean fill material and the surface returned to its original condition. <br /> The EHD approves the WP with the following exception: <br /> Low concentrations of benzene were encountered in soil samples collected from the boring I <br /> advanced'to install monitoring well MW-4. No remediation was performed in the area,. so the i <br /> well is in zan area of known or suspected contamination and, in accordance with.the Well <br /> Standards of San Joaquin County, must also be destroyed by removal of the well contents. <br /> Prior to pressure grouting the wells approved for that method of destruction, verify that the wells <br /> are unobstructed from surface grade to•total depth of each well. Any obstructed wells must be <br /> cleared of the obstruction prior to destruction by pressure grouting: If the obstruction-cannot'be <br /> removed,:the well must be destroyed by removal of the well contents.. <br /> Well Destruction WP Approval Letter.0513 <br />