COMPLIANCE INFO - Laserfiche WebLink

Home Browse Search

2.0 PEA OBJECTIVES The DTSC has agreed to provide the LUSD with a PEA for the Site under a grant funded by the USEPA. The overall objectives of the PEA include: • Evaluating historical information for indications of the past use, storage, disposal, or release of hazardous wastes/substances at the Site. • Evaluating whether current or past hazardous material management practices or waste management practices have resulted in a release or threatened release of hazardous materials, or whether naturally occurring hazardous materials are present which pose a threat to children's health,children's learning abilities,public health, or the environment. • Evaluating through a field sampling and analysis program the nature of hazardous materials that may be present in soil, surface water, or groundwater at the site, their concentration and general extent. • Estimating the potential threat to public health posed by hazardous materials at the site, using a residential land-use scenario, and performing an ecological risk screening evaluation, if necessary. Based on information developed during the PEA and the human and ecological risk screening evaluations using the DTSC's PEA Guidance Manual (January 1994, second printing June 1999), the DTSC will then make an informed decision regarding potential risks posed by the Site. Possible outcomes of the PEA decision include the requirement for further investigation through the USEPA remedial investigation/feasibility study (RDFS) process if the Site is found to be significantly impacted by hazardous substances release(s); the need to perform a removal action if localized impacts by hazardous substances release(s) are found; or issuance of a"No Further Action" finding if the Site is found not to be significantly impacted and risks to human health and the environment are found to be within acceptable levels based on the conservative screening level risk assessment. In consultation with DTSC and according to the scope of work, no asbestos-containing material (ACM) or lead-based paint inspections will be conducted for the structure during this PEA investigation. Inspections for ACM or lead-based paint may be conducted separately by the LUSD for review by the DTSC. Site visits and review of databases, historical site photos, and county records of land use provide no evidence of existing underground storage tanks or other subsurface structures. Therefore, a full geophysical survey is not within the scope of this PEA. A utility clearance survey will be conducted prior to any subsurface investigation at the Site. Page 6 PAPEA Lockeford\Work PIa U_ockeford WP.doc