Remedial Design & Oversight

Guadalupe Oil Field Restoration Project, Guadalupe, California

Project Name: Guadalupe Oil Field Restoration Project, Guadalupe, California
Services: Remediation, Air Monitoring, Groundwater Monitoring, Biological Monitoring, and Reporting Services
Client: Chevron Environmental Management Company

Since April 2010, Padre has provided remediation, groundwater monitoring, air monitoring, biological monitoring, archaeological monitoring and reporting services for the Guadalupe Restoration Project located in the southwestern corner of San Luis Obispo County, approximately 3 miles west of the City of Guadalupe. Since the second quarter of 2010, over 175,000 tons of hydrocarbon-affected soil were excavated and transported to the Santa Maria Sanitary Landfill. Air monitoring and archaeological monitoring is conducted during the course of excavations. Groundwater monitoring is conducted throughout the year and includes site-wide gauging and sampling. Results of these activities are reported in the Guadalupe Restoration Project Water Monitoring and Remediation Activities on a semi-annual basis and submitted to the Regional Water Quality Control Board, the California Coastal Commission, the California Department of Fish and Wildlife, the United States Fish and Wildlife Service, and the San Luis Obispo County Department of Planning and Building. Biological monitoring and restoration activities are conducted throughout the year and include botanical monitoring, wildlife monitoring, restoration activities, native plant propagation, and weed eradication. Results of these activities are reported in the Guadalupe Restoration Project Quarterly Ecological Monitoring Report.

Avila Beach Remediation Project, Avila Beach, California

Project Name: Avila Beach Remediation Project, Avila Beach, California
Services: Remediation Oversight and Confirmation Assessment
Client: County of San Luis Obispo

Padre staff assisted the County of San Luis Obispo in overseeing the assessment and remediation of the extensive soil and groundwater contamination in the city of Avila Beach. The soil and groundwater contamination was the result of historical oil company operation of a tank farm and pier in Avila Beach.

The initial cleanup effort addressed release of petroleum hydrocarbons in the beach surf zone and an adjacent creek estuary. Thousands of cubic yards of contaminated sand were removed for offsite treatment and disposal. Padre monitored the excavation activities and the associated confirmation sampling.

Padre reviewed the work plan and Phase II assessment work performed at the tank farm and other areas within Avila Beach on behalf of both the County of San Luis Obispo and the Regional Water Quality Control Board (RWQCB). Padre staff members were also involved in a confirmation assessment prepared as part of an environmental impact report on the remediation of the entire town. Padre was also a member of the monitoring team selected to perform environmental monitoring for the remediation of the town on behalf of the County of San Luis Obispo and the RWQCB.

Stanislaus County Office of Education, New School Site, Oakdale, California

Project Name: Stanislaus County Office of Education, New School Site, Oakdale, California
Services: Remediation
Client: Stanislaus County Office of Education

Padre completed a removal action for a proposed Alternative Education School located in Oakdale, Stanislaus County, California. The removal action consisted of the excavation and off-site disposal of approximately 1,800 cubic yards (insitu) of toxaphene impacted soil. Removal action field activities began on October 18, 2010 and were completed on November 22, 2010. Confirmation soil sampling was conducted when the extent of planned soil excavation activities were completed. Soil samples were collected from the bottom and side walls of the excavation area and chemically analyzed for the presence of organochlorine pesticides by U.S. EPA Method 8081A. The results of the confirmation soil sampling and subsequent screening level risk assessment indicated that the objectives and standards of the response action have been met. The water well was permanently abandoned prior to the start of school construction in accordance with the California Department of Water Resources water well abandonment standards. Post-Remedial Action Work Plan site conditions do not pose a significant threat to human health or the environment under an unrestricted land-use scenario. Therefore, no further action was recommended by Padre. The Department of Toxic Substances Control concurred with the Removal Action Completion Report in a letter dated February 17, 2011.