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L Groundwater will be sampled quarterly for a period of two years after the completion of soil cleanup to assure that levels of lead and copper remain at or below their present levels, which fall well within standards for safe drinking water. Public Health Based on studies conducted through mid-1988, DHS has concluded that at this site there appears to be little current threat to public health from direct exposure to contaminated concrete or soil , and no evidence that contaminated groundwater is reaching wells used for drinking water. The cleanup will be carried out so that potential risks to the public are minimal . During the cleanup, the site will remain fenced to prevent anyone except authorized workers from entering. Workers will wear protective clothing and respirators as needed, according to a DHS-approved site Health and Safetv Plan. Soil and concrete will be stored on site prior to hauling to Class I facilities. Soil that is to be treated will be placed in a storage area that is lined and bermed and will be covered if necessary to protect against contact with surface water, soil , or precipitation. Dust control measures (moistening, covering) will be applied as necessary. Soil treatment will take place in a container (a rotary mill or cement mixer) to minimize dust. The treated material will be cured in batches in a lined and bermed area of the site prior to testing and hauling to Class III facilities. Materials will be hauled by truck in covered drop boxes. Cleanup Schedule Cleanup operations at the site will commence in late August 1989 and will continue for a period of eight to twelve weeks. Groundwater sampling will continue for a period of two years after completion of remediation unless elevated levels of metals are detected. If elevated levels of metals are detected, a fact sheet will provide information about the levels, and about proposed methods for groundwater remediation. More Information Technical reports of investigations at the 2041 Navy Drive site are available at the Stockton Library, 605 N. Ei Dorado Street, and aL LiKA Corporation' s present facility at 1441 Navy Drive, Stockton. Questions and continents should be directed to the DHS Project Manager or to LIKA' s consultant: Lorna Kirby, Project Manager Mr. Jonathan Tuck Department of Health Services Woodward-Clyde Consultants 4250 Power Inn Road 500 12th Street, Suite 100 Sacramento, CA 95826 Oakland, CA 94607 (916) 924-2516 (415) 874-3248 Both Ms. Kirby and Mr. Tuck will return long distance calls to avoid telephone expenses for callers from the Stockton area.