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E CHOW ENGINEERING, INC. 7770 Pardee Lane,Suite 100,Oakland,CA 94621 <br /> ' Tel: (510)636-8500 FAX(510)636-8544 <br /> ' January 24 2012 <br /> ' Ms. Stacy Rivera <br /> San Joaquin County Environmental Health Dept. <br /> 600 E. Main Street <br /> Stockton, CA 95202-3029 <br /> ' Re: Final Closure Report, Underground Storage Tank Systems <br /> California Water Service, 1602 E. Lafayette St., Stockton, CA 95205 <br /> ' Dear Ms. Rivera: <br /> Enclosed please find the Final Closure Report for the Underground Storage Tank (UST) <br /> ' System at California Water Service Co.'s facility located at 1602 E. Lafayette Street, <br /> Stockton, CA. The closure was performed under San Joaquin County Environmental Health <br /> Department permit numbers SR0063739 and SR0064081, as well as City of Stockton Fire <br /> ' Department permit 11/12-093. <br /> The closure activities began in December 2011 and ended in January 2012. The tasks <br /> ' performed included: 1) removal of the residual tank contents, 2) excavation, removal, <br /> transportation, and disposal of the USTs at a permitted facility in Richmond, CA, 3) tracing <br /> ' and removal of associated pipelines up to the adjacent building, 4) confirmation soil sampling <br /> at the tank excavation and along the associated piping, 5) closure in place of three short <br /> segments of piping under the building foundation and confirmation sampling under the <br /> ' foundation, 6) backfill of the excavation, 7) disposal of waste generated during the closure <br /> and 8) preparation of this final closure report. <br /> ' Please contact us at (510) 636-8500 with any questions or if you need additional information. <br /> Regards, <br /> ' CHOW ENGIN G, INC. <br /> uben , <br /> Principal <br /> ' www.choweng.com Contractor's License.A545102 HAZ, C16 info®choweng.com <br />