Pump Station 117 and 284 PCE Treatment
The City of Fresno currently has two pumping Stations, PS 117 and 284 that are contaminated with PCE. PS 117 has been off-line since 2008 due to PCE levels exceeding the regulatory maximum contaminant level (MCL) while recent PCE levels at PS 284 have been below the MCL Both sites are too small to accommodate the addition of any wellhead treatment. Provost & Pritchard prepared an initial report that analyzed both sites and identified that granular activated carbon (GAC) and air stripping were both the best available treatment technologies. After the initial submittal of the report, the City directed Provost & Pritchard to investigate and provide design criteria for removal of PCE using air stripping. A second report was prepared which defined the treatment plant design parameters and developed schematic site plans for review by the City. The site plans included in the report will form the basis for the subsequent preparation of construction bid documents (i.e. plans and specifications) that will be used to bid and construct the recommended improvements.
City of Fresno