Technical data

Initial Characterization
Baseline soil samples will be collected from the placed lift prior to initiating treatment for
each batch, and periodically thereafter. The treatment cell (1000 cubic yards) will be
divided into 6 equal quadrants for baseline sampling and analysis.
Representative
samples will be taken with a soil hand auger or other sampling device from each of the six
quadrants and composited into three samples for off-site analysis. The samples will be
analyzed for the following:
l Average total petroleum hydrocarbon concentration (mg/kg TPFH) using EP,A
Method 5030/8015;
l Average total petroleum hydrocarbon concentration (mg/kg TPFH) using EP,A
Method 3550/8015;
l
Concentration of Oil and Grease (mg/kg) using EPA Method 9071; and
l
Section 1.2, Table 1.1 parameters.
Baseline soil contaminant concentrations for both light and heavy fraction hydrocarbons
will be identified. This information will be used to determine nutrient loadings and predict
treatment time needed to achieve the specified standards.
Following each sampling event,
the equipment will be decontaminated by OHM personnel using a three-step process in
accordance with standard operating procedures.
Performance Monitoring
Monitoring during the O&M period consists of measuring total organic carbon, available
nutrients, moisture, microbial population and pH which are key for optimizing biological
degradation. These parameters, methods, and frequencies were previously provided in
Section 1.2, Table 1.1.
Confirmation Sampling
At the end of each month, confirmation soil samples are collected by personnel.
The same
six quadrants used for initial characterization and performance monitoring are used for
confirmation sampling. One composite sample per two quadrants are obtained and
analyzed by an off-site laboratory using the same methods as performed in the initial
characterization as described above.
The laboratory results are evahrated to compare the
effectiveness of treatment in removing hydrocarbons to below the treatment criteria.
An
evaluation is made whether the cleanup objectives have been attained or to continue
treatment.
O&M Manual
l-6
OHM/16032