ARCHIVED REPORTS XR0001885 - Laserfiche WebLink

Home Browse Search

APPENDIX BRISK BASED CORRECTIVE ACTION TIER 1 AND TIER 2 ANALYSIS SITE CLOSURE EVALUATION REPORT Former Beacon Station No 695 900 South Cherokee Ione Lodi, Califonua Delta Project No D093-915 Page 5 and if any wells were to be added they would be in the newly developing areas of the City or north towards the Mokelumne river. A search of well logs conducted at the DWR on June 19, 1996, indicated that there are no private water supply wells located within a 2,000-foot radius of the subject property. DWR records identified five private water supply wells located between 2,000 feet and approximately 5,280 feet and 7,920 feet northeast, east, and south of the subject property The closest private water supply well is estimated to be located approximately 5,280 feet east of the subject property. Based on DWR records, the private water supply wells located nearest to the subject property generally screened from depths ranging from 150 to 460 feet bsg However the private well, located approximately 5,280 feet to the east, was screened from 52 to 72 feet bsg The status (active, inactive, or destroyed) of the private supply wells is not Down 3.0 SUMMARY OF IIWSTIIGATIION RESULTS 3.1 Distribution of]Petroleum Hydrocarbons in Soil In 1985, the initial soil borings were drilled, and three were completed as ground water monitoring wells (MW-1, MW-8, and MW-9). Table 2 summarizes the results from this initial investigation MW-10 through MW-14 were installed between 1985 and 1987 No records are available from San Joaquin County or Ultramar regarding these five wells In 1987, monitoring wells MW-15 through MW-25 were installed Table 3 summarizes soil analytical results In January 1994, the four known USTs and the associated piping were excavated and removed Confirmation soil samples were collected and analyzed from beneath the tanks, pump islands and product Imes Concurrent with this removal, monitoring wells MW-2, MW-5 and MW-7, located east and northeast of the former known tanks were destroyed Because these wells were dry, confirmation samples were also collected and analyzed from their base A tabulation of these results are presented in Table 4 RPT001 915