SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

2. Capping and Deed Restriction-This Restoration of all removed paving; and alternative includes covering the entire site with a Cleanup and restoration of all related structures new asphalt and/or concrete cap and recording a and work areas. deed restriction on the site to protect and maintain the cap. In addition, project controls designed to protect the 3. Targeted Excavation of Impacted Soil and surrounding community will be implemented during Off-site Treatment-'Ibis alternative includes cleanup activities and include the following: excavation of PAH,TPH, and VOC DTSC will oversee the preparation of a site- contaminated soil in accessible areas of the site specific health and safety plan to guide all and backfilling excavated areas with clean fill. remediation work; The excavated soil would be transported off-site An environmental project manager will be for treatment using a combination of heat to get on-site daily to monitor and approve all work; rid of contaminants and recycling. • Dust suppression activities will be performed 4. Targeted Excavation of Impacted Soil and including limiting the size of excavated areas for Off-site Disposal—This alternative includes easy management, spraying water onto soil and excavation of PAH,TPH, and VOC work areas,stopping all work on windy days, contaminated soil in accessible areas of the site covering soil piles, and covering all trucks leaving and backfilling the excavated areas with clean fill. the site; The excavated soil would be transported off-site for disposal at an appropriately permitted facility. Workers will take measure to limit noise from construction including working only during Proposed Cleanup—Alternative 4: Soil hours allowed by rhe city and keeping noise Removal with Off-Site Disposal levels below city-allowed decibel levels; and Based on evaluation of the cleanup alternatives, On-site workers will monitor noise and airborne targeted excavation of PAH,TPH, and VOC dust during all excavation activities and contaminated soil and backfilling the excavated areas throughout the daytime work schedule. with clean fill is the preferred remedial alternative In the unlikely event that the implementation of the identified in the draft RAW. Implementation of this alternative would return the site to unrestricted land removal action at the site does not meet the project use, offering long term protection of the goal of returning the site to unrestricted land use, the environment and the surrounding community. following contingency planning activities, outlined in detail in the draft RAW, may be implemented for The following activities would be performed under areas that could not be remediated due to the proposed alternative: inaccessibility: • Performing an underground utility survey to Placement of land use covenants/deed restrictions identify all piping and other underground on the property; features; • Installation of extraction systems for the soil gas • Removal and demolition of asphalt paving and groundwater to remediate residual impacts within six areas of the site; not removed during the removal action; and/or • Phased removal of 6,000 tons (approximately Placement of an oxygen release compound in the 200 truckloads) of soil and asphalt from depths water to stimulate biological remediation of ranging between one and thirteen feet; impacts in groundwater. • Placement of excavated soil in a truck and/or bin for off-site disposal;Backfill and compaction of excavated areas with clean, imported soil;