SCH Number 2023120010

Project Info

Title

Bradley 5-3 Well Sump Remediation Project

Description

The project is for a Land Use Permit (Case No. 23LUP-00066) to implement the actions described in the Site Assessment Report and Remedial Action Work Plan dated January 20, 2023 prepared by Atlas Technical Consultants LLC, including excavation of approximately 2,700 cubic yards (0.17 acres) of hydrocarbon impacted soil and the historic well sump from the Bradley 5-3 oil well sump location. Excavation of hydrocarbon-impacted material surrounding the oil well sump is proposed to extend to a maximum depth of approximately 10 feet below ground surface (bgs) within an approximately 32,000-square-foot (0.7-acres) work area Hydrocarbon-impacted soil may be temporarily stockpiled onsite. Temporary chain link fencing with access gates will be installed around the work area. The project will result in approximately 2,700 cubic yards of impacted soil to be removed and replaced with clean fill. Following excavation, inspection and verification sampling will be performed. Up to 25 confirmation samples will be collected within the sump area. When confirmatory soil samples collected from the bottom and sides of the excavation indicate that TPH concentrations are below the Environmental Health Services investigation level of 100 mg/kg, and other compounds are below their respective Environmental Screening Level or accessible limits are reached, the cleanup objective will be considered achieved. Impacted soil will be excavated, stored, loaded into dump trucks, and transported off-site to the Santa Maria Landfill for disposal. Plastic sheeting or geotextile fabric will be placed on the ground surface in the load out area (as necessary) to prevent hydrocarbon-impacted material from coming in contact with the underlying surface. Clean fill will be placed in lifts and compacted. Imported backfill and clean excavated soil (soil above the impacted zone) may be stockpiled onsite and re-used as backfill. The project will include approximately 185 truck trips for export material and 185 truck trips for import material. The property will be restored to existing conditions by grading the area to as near original grade as possible and removing the temporary fencing. The anticipated duration of the project is approximately 4 to 6 weeks. One week for site set-up; two to three weeks to excavate and backfill / compact; and one week for site restoration and landscaping. Heavy equipment will not be used at the site before 8 a.m. or after 5 p.m. Monday through Friday, with no weekend or after hours work unless dictated by unforeseen circumstances. The total area of disturbance of the excavation of the sump and lease road is approximately 0.90 acres. The project site is located at 3700 Telephone Road and is associated with Assessor Parcel Numbers (APN) 129-010-011, zoned Ag-II-40, in Santa Barbara County, California within the Fourth supervisorial district.

2 documents in project