CX-020002: Data Acquisition and Installation of a Permeable Reactive Barrier in P-Area

A subcontractor designed and constructed a permeable reactive barrier (PRB) in the subsurface to intersect volatile organic compound (VOC) contamination within the P-Area groundwater plumes.  Revision 3:  After collection of soil and groundwater data, the design for the PRB has been modified to extend over a lateral distance of 252 feet.  The PRB will be installed via 22 injection locations.  A total of 23 resistivity strings will be installed approximately 24 ft away from the PRB to monitor the injection of ZVI.  Prior to the installation of the injection wells and resistivity strings, USFS will perform maintenance and site preparation to include minor grading and the placement of stone to allow for equipment access.  The area of disturbance will be less than 1 acre.   After installation of the PRB 4 additional monitoring wells will be installed.  All the activities described in this revision will be performed within the existing Site Use boundaries.

A laydown area will be located along SRS Road F where four (4) storage containers, an enclosed trailer, a fuel farm, and ancillary equipment will be stored.  Adjacent to the storage containers will be a fuel farm with a 500-gallon tank in secondary containment that will be fenced in and locked. Additionally, an enclosed trailer will be on-site to store the glacial acetic acid, which will also be in secondary containment.