EP 1110-1-19
30 Jun 01
Exhibit 4-6
Example Performance Standards and Construction Quality Control
(Section 5)
Performance Standards
The quantity of soil treated by landfarming was 8,100 yd3. Initial concentrations of PAHs in untreated, stockpiled
soil ranged from 100 to 208 mg/kg. Upon completion of land treatment, the concentration of TCICs in soil ranged
from 23 to 92 mg/kg.
All soil and sludge samples collected during operation of the land treatment area were analyzed for PAHs. EPA
Method 8270 was used to measure the concentrations of PAHs in all samples. Composite samples were collected
quarterly from eight subplots in the land treatment area over an 18-month operating period. Once the cleanup goal
had been achieved in a subplot, that subplot was not monitored further until an additional lift of soil was applied
to the subplot.
Performance Results Compared with Remediation Objectives
Remediation Objectives
Performance Results
Sampling conducted in June 1998 indicated that the concentration
Reduce concentration of TCICs to 100 mg/kg.
of TCICs was less than 100 mg/kg and ranged from 23 to 92 mg/kg
in the eight subplots.
Attain desired remediation objectives within two years after
Cleanup levels were attained within 18 months after startup of the
startup of the land treatment operation.
land treatment operation.
Identify, remove, stabilize, and dispose (off-site) of excavated
Sampling detected no soils with contamination above this specified
OU 2 soils with TCIC levels greater than 5,000 mg/kg.
level.
Quality Assurance and Quality Control
The QA/QC program used throughout the operation of the land treatment area was outlined in the RD/RA work
plan and quality assurance project plan (QAPP) approved by EPA. The program enabled EPA to determine that
all analytical results reported were accurate and adequate to ensure satisfactory execution of the remedial action,
in a manner consistent with the requirements of the ROD.
The RA contractor conducted sampling and analysis activities on the soils each quarter. EPA took split samples
during three sampling events, including the final sampling event on June 28, 1998. EPA periodically conducted
oversight of the PRP contractor's field sampling procedures. While deviations from the approved protocols were
identified, none was sufficiently significant to cause rejection of the data. Matrix spike, duplicate, and blank
samples were analyzed by the laboratory, and the resulting data provided to EPA. On the basis of the split sample
data, the confirmatory sampling data were acceptable to EPA. The Florida Department of Environmental
Regulation (FDER) also reviewed the data and found the data to be acceptable.
The QA/QC program is also being used for the semiannual sampling of groundwater.
4-9
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