Remediation

Remediation

Remediation

 

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Overview

Pipelines for the Avila Beach offshore loading facility ran under the main street of this coastal resort town. During their years of operation the pipelines leaked diesel, gasoline, and crude oil and gas, causing soil contamination in the area. After years of debate and public forums, oil company officials assembled a team and began developing a work plan for the excavation and remediation of the hydrocarbon affected sand and the removal, demolition, and replacement of the town of Avila Beach.

This Brownfield Development consisted of the following:

  • The 9.5 acres of clean-up effort was separated into three excavation areas called cells.
  • Utilities were temporarily relocated.
  • 70 residents were relocated; 23 buildings demolished; 27 residential units demolished; and 31 parcels excavated.
  • Interlocking steel panels called sheetpile were installed deep into the soil to create a wall around the perimeter of the excavation cells.
  • More than 200,000 tons of affected material was excavated and an equal amount of clean soil was brought in.
  • 10,000 truckloads were driven a total of 2.8 million accident-free miles to dispose of the waste.
  • Reconstruction of the public utilities and street improvements and park.

Cannon Projects - Energy - Avila Beach Remediation Project Cannon prepared plans, specifications and cost estimates for grading, drainage, and structural shoring for the beach properties and several of the town properties affected by the contamination. This included the layout of steel sheet pile cofferdam, removal and replacement of sand, placement of a high density polyethylene (HDPE) liner and the design of offsite temporary storage facilities for stockpiling the hydrocarbon affected sand. We prepared plans and specifications for approximately 4000 feet each of water, sewer, storm drain, gas, and wire utility mains and services. We worked closely with the client, the utility companies, the regulatory agencies, the contractors, and the other consultants to prepare a well-planned design within the project’s timeframe. In addition, Cannon was part of a team of consultants who developed a feasibility study of alternatives to address the options of solidification and/or excavation of hydrocarbon-affected sand prior to the excavation.

Cannon prepared the cultural resources evaluation, which identified buildings to be saved because of historic character. In addition, we participated in weekly coordination and planning meetings to implement all phases of the master plan including the replacement of buildings and the installation of streets and utilities (water, sewer, gas, electricity, storm drainage, telephone, and cable TV). Overall, more than 60 permits and approvals from more than 10 government agencies were needed to complete the project.

Cannon Projects - Energy - Avila Beach Remediation Project Cannon prepared work plans and documentation, coordinated with and processed the permits through the permitting agencies. We participated in weekly meetings with the agencies and prepared weekly project schedules and permit compliance reports. The agencies involved included Regional Water Quality Control Board, San Luis Obispo County Air Pollution Control District, Port San Luis Harbor District, Avila Beach Fire Department, Avila Beach Community Services, District State Historical Preservation Office, California Coastal Commission, California Department of Fish and Game, State Lands Commission, U.S. Fish and Wildlife Service, and U.S. Army Corps of Engineers.

The Avila Beach Remediation Project and Front Street Enhancement Project are finished and all the amenities are open to the public. The roads are open and a new pedestrian plaza features decorative concrete, an observation deck, colorful landscaping and a unique tide pool fountain.

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Information

Location
Avila Beach, California

Market
Remediation

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