Environmental Engineering

Phase I & II Environmental Site Assessments

City of Fresno, California

Phase I & II Environmental Site Assessment for Porterville Hotel

City of Porterville, California

Phase I Environmental Site Assessments for Conservation Efforts

The Nature Conservancy, Chico, California

Provost & Pritchard completed five Phase I Environmental Site Assessments (ESA) for the City of Fresno’s Department of Public Works for five new well pump stations. These properties included residential and industrial properties at various locations within the City of Fresno.


Another Fresno Area project included the Phase I & II ESA and Cleanup Plan prepared for the Fresno Redevelopment Agency prior to the construction of the new IRS building in Downtown Fresno. This project consisted of a Corridor Study site assessment of a downtown block of over 10 businesses. Former underground storage tank (UST) and auto repair businesses were identified from historical research. Geophysical and asbestos & lead based paint surveys, soil sampling & analysis for solvents, metals and petroleum compounds were also conducted. Groundwater monitoring wells were installed and sampled for the presence of volatile solvents. Groundwater monitoring wells were later decommissioned under RWQCB oversight. The project was successfully completed under an expedited schedule and tight budget to meet the construction timeline for the new building.

This project consisted of the completion of the Phase I Environmental Site Assessment (ESA) and asbestos and lead-based paint survey of the historic Porterville Hotel. The hotel was built in the late 1800s, and the site is less than one acre in size. The City of Porterville had tentatively slated the hotel for demolition and had concerns regarding the presence of asbestos and lead-based paint. Provost & Pritchard staff conducted an extensive historical use investigation of the hotel to identify other recognized environmental conditions of concern. Historical records reviewed included Sanborn fire insurance maps, city directories, historical topographic maps, and aerial photography as well as assessor’s tax improvement records. An asbestos and lead-based paint hazards survey which identified several hazards that would require abatement prior to demolition.


The hotel burnt down in 2013. The City wanted to understand the condition of the property as a result of the complete destruction of the structure before selling. Soil borings were recommended below the subgrade of the hotel basement. The hotel was constructed with a basement, which may have contained  heating fuel oil tanks and several unidentified pipelines.  A Geoprobe rig was brought in to be able to obtain soil samples for analyses to depths of 30 feet.  samples quickly. A ramp was constructed to allow access to the basement by the drill rigs and samples were collected directly adjacent to the suspected tanks and pipelines. Laboratory data indicated that that no significant soil impacts were present and the City of Porterville placed lot for sale.

Provost & Pritchard prepared Phase I Environmental Site Assessments for the Nature Conservancy to facilitate the Conservancy’s conservation efforts. Provost & Pritchard completed a Phase I ESA for the Foor 2 Ranch property, a 515-acre cattle ranch and rural residential property located in southern Tehama County, prior to The Nature Conservancy purchasing a conservation easement for the property. Additionally, Provost & Pritchard assisted The Nature Conservancy in preparing a Phase I ESA for 900+ acres of farmland located along the west side of the Sacramento River, south of Hamilton City in Glenn County. The Nature Conservancy, which had leased a majority of the acreage to tenant farmers, transferred the land to a local Reclamation District after the Phase I ESA and supplemental investigations were completed.

Provost & Pritchard Consulting Group, 2019