Phase I Environmental Site Assessments

Oceano Drainage Project, Oceano, California

Project Name: Oceano Drainage Project, Oceano, California
Services: Phase I and II Environmental Site Assessment
Client: County of San Luis Obispo Public Works Department

Padre recently completed a Phase I ESA for the County of San Luis Obispo Public Works Department for the proposed Oceano Drainage Project in Oceano, California. The objective of the proposed drainage project is to convey storm water runoff from the commercial area of Oceano to the Arroyo Grande Creek, crossing the Union Pacific Railroad right-of-way and several industrial properties. Padre identified two historical areas of potential concern along the proposed drainage pipeline alignment, including potential surface soil contamination from historical railroad maintenance activities, and a historical industrial cooling tower location. Padre is currently implementing a Phase II ESA work plan to collect and chemically analyze soil samples from designated sample locations along the proposed pipeline alignment.

San Benito High School District, New High School, Hollister, California

Project Name: San Benito High School District, New High School, Hollister, California
Services: Phase I Environmental Site Assessment
Client: San Benito High School District

In 2012 Padre completed a Phase I environmental site assessment (ESA) and environmental hazards report for a proposed high school site, located at 510 Hillcrest Road, Hollister, San Benito County, California (Project Site). The objective of the ESA was to determine whether current or previous land use at or adjacent to the Project Site may have involved, or resulted in the use, storage, disposal, treatment, and/or release of hazardous substances to the environment. The ESA was completed consistent with the American Society for Testing and Materials (ASTM) Standard Practice for Environmental Site Assessments (E-1527-05). Based on the past agricultural uses at the Project Site, it is Padre's opinion that the Department of Toxic Substances Control (DTSC) will require the completion of a Preliminary Environmental Assessment (PEA) to address: 1) the potential for residual pesticides in soils from former agricultural use; 2) the potential for lead in soils from the weathering of lead-based paint from building structures; 3) the potential for residual termiticides in surface soil from building structures; and 4) the potential for TPH in soil from an AST containing diesel fuel and from 55-gallon drums containing waste oil at the Project Site.

Kettleman Unit Oilfield, Kings and Fresno Counties, California

Project Name: Kettleman Unit Oilfield, Kings and Fresno Counties, California
Services: Limited Phase I Environmental Site Assessment
Client: Chevron North America Exploration and Production Company

Padre conducted a limited Phase I environmental site assessment (ESA) for the approximately 30,080-acre Kettleman Unit Oilfield, located in both Kings and Fresno Counties, California (Project Site). The objectives of the limited Phase I ESA services were to identify areas of potential concern (AOPCs) located at the Project Site; to determine whether or not historic or current use of the Project Site has resulted in potential recognized environmental conditions; identify AOPCs that are documented and listed with publicly accessible regulatory agency files; and to assist Chevron in understanding known or suspected environmental conditions associated with the individual sections that comprise the Project Site.

The limited Phase I ESA, included the review of available environmental databases and available historical data, and was performed in general accordance with the current American Society of Testing and Materials (ASTM) E 1528 standard practice for environmental site assessment (ESA) transaction screening process guidelines.

Padre identified the general historical uses at the Project Site including AOPCs, and concluded that the observed AOPCs that would represent the greatest potential environmental risks were the historical and current presence of crude oil-gas production facilities; drilling sumps, and aboveground facilities used for produced oil and water. These types of facilities are known to potentially result in the generation of significant volumes of total petroleum hydrocarbon (TPH)-containing soil, and potentially elevated concentrations of volatile organic compounds and metals in soil.