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FFdocuments: TION FROM PUBLIC ENVIRONMENTAL DOCUMENTS g numbered information corresponds with the numbered Investigative Methods e 2 that are applicable in describing information from the public environmental (at' The Environmental Data Resources Radius Map denoting all sites containing environmental ncerns shows that only one site out of 11 sites can be considered theoretically upgradient to the ubject property with respect to assumed groundwater flow. This facility is the Equinoa Property 4599 Manthey Road. This site appears to have been a solid waste disposal site and is one-half / mile south of the property. ® As referenced, the attached aerial photographs illustrate the land use of the subject property to be residential, trees (almonds and walnuts), cattle grazing and the discarding of refuse. Regarding agrichemical residues, it can be noted from all of the aerial photographs, particularly the 1982 and 1994 photographs, that the property was never farmed entirely in tree crops. The potential for agricultural chemical soil residues is highly unlikely. It is a slight possibility that the insecticide DDT could have been applied to the trees up to 1970, but again unlikely. Residual studies of DDT and its degradates DDD and DDE conducted in San Joaquin County suggest the hazard to human health from these compounds is insignificant. OO Mr.Noceti, Mr. Rose and Mr. Whorton all grew up in the location of the subject property. It is their collective recollection that the on-site trees were never actually "farmed" and that there had been cattle, specifically Brahma cattle, grazed on the property until a year ago. None of them recall a building in the southwest corner of the property. ® The Lines of Equal Depth and Elevation of Groundwater maps published by the San Joaquin County Flood Control District show the groundwater to be approximately 20 feet below grade and flowing in an east-northeasterly direction. It is conceivable that the Walker Slough affects the depth and direction of flow of the underlying groundwater. The nearby Well Log illustrates the underlying soil lithology to be composed of sand and clay strata. Research of the EHD files on the World Enterprises Landfill reveals it was a permitted site that was started in 1971 and was closed in 1983. It encompassed 8 acres and was 18 to 20 feet deep. In December 1988, it was conveyed in correspondence that methane gas existed at the Landfill site. It is unknown if methane gas remains, or has migrated off-site. The attached plot plan from the EHD files illustrates the location and orientation of the Landfill. Title 27, §21190, Item(g) of the California Code of Regulations pro Bthane gas mitigation requirements for potential construction that may occur wi 1ofany disposal area. This includes disposal facilities such as the World Enterpll. Page-5- Ch mey Cmisulting