Install Purge Water Management Unit(s) at Chemicals, Metals, and Pesticides Pits Monitoring Well(s) CX(s) Applied: B6.9 Date: 12/13/2011 Location(s): South Carolina Offices(s): Savannah River Operations Office
Office of NEPA Policy and Compliance
December 13, 2011
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Install Purge Water Management Unit(s) at Chemicals, Metals, and Pesticides Pits Monitoring Well(s)
CX(s) Applied: B6.9
Date: 12/13/2011
Location(s): South Carolina
Offices(s): Savannah River Operations Office
Groundwater Monitoring Well Chemical, Metal and Pesticide (CMP) 10D requires a purge water management system (PWMS) tank due to the presence of pesticides in the most recent groundwater monitoring sample. The presence of pesticides (lindane), along with perchloroethylene and trichloroethylene, prohibits the purge water from this well to be discharged to the ground and exceeds the waste acceptance criteria for all other waste disposal options. CMP 10D is required to be sampled semi-annually as part of the Monitored Natural Attenuation (MNA) remedy for the CMP Pits Groundwater. A PWMS tank will be installed on CMP 10D so that groundwater samples can be collected semi-annually without generating investigative derived waste (IDW). The PWMS tank allows the purge water to be returned to the monitoring well after sampling. The appropriate calculations were performed to confirm that the hydraulic properties for the well are suitable for the PWMS.
CX(s) Applied: B6.9
Date: 12/13/2011
Location(s): South Carolina
Offices(s): Savannah River Operations Office
Groundwater Monitoring Well Chemical, Metal and Pesticide (CMP) 10D requires a purge water management system (PWMS) tank due to the presence of pesticides in the most recent groundwater monitoring sample. The presence of pesticides (lindane), along with perchloroethylene and trichloroethylene, prohibits the purge water from this well to be discharged to the ground and exceeds the waste acceptance criteria for all other waste disposal options. CMP 10D is required to be sampled semi-annually as part of the Monitored Natural Attenuation (MNA) remedy for the CMP Pits Groundwater. A PWMS tank will be installed on CMP 10D so that groundwater samples can be collected semi-annually without generating investigative derived waste (IDW). The PWMS tank allows the purge water to be returned to the monitoring well after sampling. The appropriate calculations were performed to confirm that the hydraulic properties for the well are suitable for the PWMS.