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*01 GROUND ZERO ANALYSIS, INC. ,:L_RVICI= , 3422 W. Hammer Lane, Suite C-294 AM 10: 35 Stockton, California 95219 'telephone: (209) 952-3451 Facsimile: (209) 952-9891 August 15, 1995 Mr. Steve Sasson, Senior REHS San Joaquin County Public Health Services Environmental Health Division P.O. Box 388 Stockton, California 95201 Subject: Final Closure.Report -Destruction of Monitoring Well MW-1, Nor Cal Beverage Company, 1800 East Fremont Street, Stockton, California. Dear Mr. Sasson: In response to the August 1, 1995 San Joaquin County Public Health Services Environmental Health Division (PHSIEHD), letter Ground Zero Analysis, Inc. (Ground Zero) is submitting this final closure report for the subject site. On August 14, 1995 a Ground Zero geologist supervised Spectrum Drilling Company (C-57 license No. 512268) of Stockton, California destroy 2-inch diameter, monitoring well MW-1. The well was screened from 60.16 feet to 74.26 feet. Depth to water was measured in MW-1 at 61.93 feet below the top-of-casing prior to destruction. The well was destroyed in accordance with PHS/EHD requirements under permit No. 006960. Mr. Harlin Knoll of PHSIEHD observed the well destruction. A mixture of four bags of Type 11 low alkali Calaveras cement, 5 lbs of bentonite powder and approximately 30 gallons of water were tremmied into the well casing using 1-inch diameter PVC pipe from the total depth (75 feet) to ground surface. The well was then pressure grouted, to ensure that any void space in the filter pack and surrounding formation around MW-1 were filled. An 8-inch outside diameter hollow-stem auger was advanced by Spectrum to a depth of five feet in order to drill out the well casing. The remaining grout was then poured into the boring from 5 feet to 1 foot below ground surface. Concrete mixed with black dye was placed in the remaining 1 foot of the boring, level with the surrounding asphalt surface. Nor Cal has complied with all PHSIEHD requirements for site closure, and trusts that the property will now be removed from the contaminated site list, and a final closure letter will be forthcoming.