IRP Manager Comments on Former Waste Pit TEM

October 14, 2014

View IRP Manager Comments on the Former Waste Pit Technical Exchange Meeting (TEM) of 9-11-2014.

September 11, 2014

The Lahontan Regional Water Quality Control Board (Water Board), PG&E, Community Advisory Committee (CAC), United States Geological Survey (USGS) and the Independent Review Panel (IRP) Manager met at the IRP Manager’s office in Hinkley on September 11, 2014 to discuss the next steps for the Former Waste Pit Investigation. The Former Waste Pit is located on a PG&E owned property located southwest of Community Blvd and Hinkley Rd. Waste from the Former Waste Pit consisted of primarily household and automotive materials. PG&E removed the waste and backfilled the Former Waste Pit with clean soil during the summer of 2013. Low detections of Total Petroleum Hydrocarbons (TPH) and Polychlorinated Biphenyl (PCB) in soil samples were detected during the closure of the Former Waste Pit. The Water Board issued an Investigative Order (IO) on March 5, 2014 to PG&E to investigate if waste from the Former Waste Pit had impacted groundwater.

During the meeting the CAC had the opportunity to ask the Water Board several questions regarding the reduction of monitoring locations from the March 5 IO, the need of oversight from the Water Board, additional soil samples and sampling locations. Results at MW-163 were discussed along with proposed next steps for the Former Waste Pit Investigation. The IRP Manager has reviewed the situation and has written comments regarding the seeming infeasibility, based on what is presently known, for hydrocarbons to impact MW163D and not MW 163S.

July 14, 2014

Location of IO No R6V-2014-0019

View PDF – Closure Report for Debris Removal and Cleanup, 12-4-2013