News Alert!!: Colorado River Tri-State: Public open houses to be held regarding the Pacific Gas and Electric Topock Compressor Station groundwater remediation project.
In preparation of work on the Pacific Gas and Electric Topock Compressor Station groundwater remediation project, the public is invited to attend 2 open houses planned to be held in 3 weeks in the Colorado River Tri-State.
** Public Open House Locations: **
- Tuesday, April 17th, 2018:
From 5:00pm To 7:00pm PT
Needles Senior Center
1699 Bailey Avenue
- Wednesday, April 18th, 2018:
From 5:00pm To 7:00pm MST
Golden Shores Community Recreation Center
13136 Cove Parkway
Golden Shores, Arizona
The open houses, that plan to provide more information on the project that is schedule to begin late 2018, will be hosted by United State Department of the Interior with support from the California Department of Toxic Substances Control, Pacific Gas and Electric (PG&E) and others officials.
The Pacific Gas and Electric Topock Compressor Station is located on 65 acres of land south of Needles, California and is surrounded by the Havasu National Wildlife Refuge and is on a hilltop overlooking the Interstate 40 bridge and Colorado River.
An environmental investigation and cleanup around the Pacific Gas and Electric Topock Compressor Station has been underway since 1997, when a plume of chromium was detected in the groundwater.
From 1951 to 1985, Pacific Gas and Electric used hexavalent chromium as a corrosion inhibitor for the facility’s gas compression cooling tower.
From 1951 to 1964, the hexavalent chromium was dumped into near by dry washes and treated wastewater was discharged into ponds for storage and evaporation.
Eventually, hexavalent chromium seeped into the groundwater and created a groundwater plume under Pacific Gas and Electric Topock Compressor Station.
In 1996, Pacific Gas and Electric self-reported contamination of the groundwater and testing located an underground plume from 28 to 35 feet below ground covering about 150 acres.
Operations at the Pacific Gas and Electric Topock Compressor Station also resulted in contamination of soils located both inside and outside the Pacific Gas and Electric Topock Compressor Station’s fence line.
There has been no detection of the chemical in the Colorado River and no contaminated drinking water wells in the area.
According to a report by the from the California Department of Toxic Substances Control, an interim cleanup measure was installed in 2005 to continue to protect the Colorado River; to date, more than 8,700 pounds of chromium have been removed from groundwater, with the cleaned water recycled back into the aquifer.
According to the California Department of Toxic Substances Control, the final cleanup technology of in-place treatment with freshwater flushing was accepted in 2011 and Pacific Gas and Electric expects to begin construction, operation, and monitoring of the final groundwater remedy in the third quarter of 2018, after the Supplemental Environmental Impact Report is approved.
A soil remedial investigation report is being prepared concurrently with the soil risk assessment and is expected to be completed sometime in 2019.
Back on Thursday, March 9th, 2017, ZachNews Photojournalist Zachary A. Lopez was with members of the California Regional Water Quality Control Board during a tour of the PG&E Topock Compressor Station.
During that tour, members of the California Regional Water Quality Control Board learned more information about the cleanup project to clean up the plume and were shown where the cleanup project will take place as well as what will be done during that process.
** More information regarding the Pacific Gas and Electric Topock Compressor Station and the groundwater remediation project can be found at the following website addresses: **
- California Department of Toxic Substances Control:
- Pacific Gas and Electric:
** Pictures and Video from ZachNews: **