SECTION FIVE
Performance Standards and Construction Quality Control
The overall performance of the AS/SVE system, as compared to the performance objectives, is
discussed below.
PERFORMANCE OBJECTIVES
The ROD specified four objectives for the remedy:
To prevent exposure to contaminated groundwater;
To restore the contaminated groundwater to its beneficial use (drinking water);
To minimize movement of contaminants from soil to groundwater; and,
To prevent exposure to the contents of the landfill.
No soil cleanup levels were identified. The cleanup levels established for groundwater in the
upper aquifer beneath the site were:
TCE - 5 g/L - the Federal Safe Drinking Water Act MCL
VC - 1 g/L - the Ohio State Model Toxics Control Act Method B
Monitoring of Mn was required along the western border of South and Northwest LF5 to
determine any changes in concentration.
A site-specific air emission threshold limit of 2.5 parts per million volume (ppmv) TCE was
calculated by USACE using Screen Model 3 and the Riverfront Air Pollution Control Agency
(RAPCA) acceptable source impact levels. The air stream between the first and second carbon
canisters is monitored every other week using a photoionization detector (PID). The PID
breakthrough action level is 1.5 ppmv total VOCs. The breakthrough action level is used to
determine when the first carbon bed needs to be removed from service.
To assess the overall performance of the system, performance monitoring is required throughout
the operation of the system. The specific requirements are detailed in the compliance monitoring
plan and include contaminant reduction monitoring to evaluate progress towards achieving the
cleanup goals, contaminant migration monitoring to confirm that the plume is being contained,
and contaminant treatment monitoring for air emissions.
TREATMENT PERFORMANCE DATA AND ASSESSMENT
The full-scale system operation began when the startup activities were completed on July 29,
1995. The full-scale system operation is currently ongoing. Performance data through
December 7, 1999 were included in Chemical Data Report #5, which was the most recent
document used in preparation of this report.
In general, the SVE system was operated between 0 and 1,290 standard cubic feet per minute
(scfm) extracted, and the air sparging system was operated at between 0 and 210 scfm injected.
The passive air injection wells initially remained closed from April 1, 1995 and July 29, 1995,
5-1
Ft. Griffey Landfill 5 OU Interim RA Report
Previous Page
