COMPLIANCE INFO_FILE 1 2003-2006

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' the expected lead intake due to inhalation of ambient air, ingestion of drinking water, and consumption of produce grown on the site in addition to the ingestion, inhalation and dermal contact with the soil. The program calculates the expected blood lead concentration resulting ' from occupancy of the property for both adults and children and for residential and occupational (commercial/industrial) exposure. The output section of the spreadsheet displays the calculated blood lead value and also displays the soil lead concentrations (PRG-99) that would be expected to result in a blood lead concentration of 10 micrograms/deciliter. 10 ug/dl is the US Centers for Disease Control's level of concern for adverse health effects. The PRG-99 for residental exposure for an average child is 146 ppm, and for the more sensitive pica child (eats dirt) is 94 ppm. Both these values are greater than the maximum concentration on the site. Utilizing the UCL soil concentration of 73 ppm (which is higher than the maximum ' detected level) the calculated blood lead concentration for a residential occupant of the site, from all sources of exposure, is only 7.2 ug/dl for a normal child and 8.8 ug/dl for a pica child. iThe lead in soil at the site would not pose a significant health risk under a residential property use. The Leadspread input and output data are presented in Table 4. 6.0 COMMUNITY PROFILE The subject property is located on the western boundary of the incorporated area of the City of Stockton. According to the 2002 US Census the population of the City is approximately 265,000. Approximately 8,500 individuals live within one mile of the site. Land use to the east of the Village West Marina is fully developed for residential and commercial use. Land to the west of the site is part of the San Joaquin/Sacramento River Delta and is agricultural. The Marina itself is utilized primarily for non-resident boat storage although according to the manager approximately 10 or 12 individuals are living on their boats. Given the proximity of the property to the Delta and the aquatic recreation demand of nearby population centers we ' would not anticipate a change in use in the near future. We are not aware of any community or media interest in this minor contamination case. 7.0 CONCLUSIONS ' The concentrations of COPCs in soil at the site would not present a significant toxicity hazard to potential residential occupants (Hazard Index <1 and blood lead concentration < 10 ug/dl). The lifetime excess cancer risk associated with potential exposure to the COPCs in the soil under a residential property use is insignificant (less than one chance in one million). No significant risk to human health exists due to the presence of COPCs in the soil at the site. The extremely low solubility of the copper in the site soil (less than 1%) and actual DI-WET leachate concentrations which are at least an order of magnitude below drinking water standards 9