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Activity |
Objectives |
Action |
Objective
Attained? |
Recommendations |
Objective
1: Meet TNRCC Requirements
for Site Closure |
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Attainment of Risk Reduction Standard Number 1: Closure/Remediation to Background |
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Remove
all hazardous and nonhazardous waste and waste residues and contaminated
design and operating system components such as liners, leachate collection
systems, and dikes from the unit or area of the unauthorized discharge.
For remediation of media that have become contaminated by releases from a
waste management unit or by other unauthorized discharge of hazardous or
nonhazardous waste, the contaminated media must be removed or
decontaminated to cleanup levels specified in this section (30 TAC
335.554(b) and (c)). |
Waste
on site was removed and surface soil samples were collected to determine
if waste residue remained.
A geophysical survey was conducted to determine if there is
evidence of buried waste at the site.
|
Yes.
Barbed wire fence roll and metal beams which were disposed of at the site
have been removed. Surface soil samples collected at the site indicated no
COCs above RRS1 standards. The
geophysical survey indicated that there are no electromagnetic anomalies
at the site, therefore, buried waste is not suspected.
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Closure |
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Determine
compliance with RRS1 closure requirements by comparing to background as
represented by results of analyses of samples taken from media that are
unaffected by waste management or industrial activities. If the practical
quantitation limit (PQL) is greater than background, then the PQL rather
than background shall be used as the cleanup level provided that the
person satisfactorily demonstrates to the executive director that lower
levels of quantitation of a contaminant are not possible (30 TAC
335.554(d)). |
Contaminant
concentrations were compared to second revised background levels (Parsons,
February 2002) or PQLs. |
Yes. |
Closure |
|
Attainment
of cleanup levels shall be demonstrated by collection and analysis of
samples from the media of concern (30 TAC 335.554(e)). |
Surface
soil samples were collected at the site and analyzed for contaminants of
potential concern, including metals, VOCs, and explosives. |
Yes |
Closure |
Objective
2: Meet Requirements of
3008(h) Order for RFI |
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RFI Workplan Requirements |
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Field Sampling (Detailed
listing of methods and procedures are provided in project plans which are
incorporated by reference). |
Conduct field sampling in accordance with
procedures defined in the project work plan, SAP, QAPP, and HSP. |
All
sampling was conducted in accordance with the procedures described in the
project plans. |
Yes.
|
NA |
Facility Investigation |
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Characterization of Environmental Setting -
Hydrogeology (B.3.A.1) |
Evaluate hydrogeologic conditions at the site. |
Not
included in this phase of the RFI at B5. Groundwater
of the Trinity Aquifer is being addressed through the Groundwater
Investigation. |
NA |
NA |
Characterization
of Environmental Setting- Soils (B.3.A.2) |
Characterize soils in accordance with USCS soil
classification system (B.3.A.2(a)). |
Soil
types at the site are based on the SCS Bexar County Soil Survey (USDA,
1991) and are described in Section 1.2.1.
|
Yes. |
NA |
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Determine soil pH (B.3.A.2(e)). |
The
pH of each of the soil types evaluated as part of the background metals
concentration study was determined through laboratory analysis.
According to those analyses, the pH of Krum Complex soils was 7.87. |
Yes. |
NA |
|
Determine moisture content (B.3.A.2(g)). |
The
moisture content of each sample was analyzed.
Moisture content values are provided in Appendix A and ranged from
10.3% to 22.2% |
Yes. |
NA |
|
Characterize marshes, creeks, wetland areas, or
ditches at the site. |
No marshes, creeks, wetland areas, or ditches are present at the site. Direction of runoff flow has been evaluated in Section 1.2.3 |
NA |
NA |
Characterization
of Environmental Setting – Surface Water and Sediment (B.3.A.3) |
Identify the source area (B.3.B.1). |
A
description of the source area is provided in Section 1.1.2.2. |
Yes.
The geophysical survey conducted did not reveal any anomalies
associated with waste management activities. |
NA |
Source
Characterization (B.3.B) |
Identify the location of the unit/disposal area
(B.3.B.2(a)). |
In
1999, points along the boundary of B5 were surveyed with a Rockwell
Plugger GPS unit (estimated accuracy of ±25 feet). The boundary of the site was reviewed during preparation of
this report and adjusted, if necessary, based on observations made during
the field investigation. |
Yes.
Although the accuracy of the boundary survey of the site is
estimated to have an approximate error of 25 feet, this accuracy is
sufficient for closure under RRS1. If CSSA decides to close the site under RRS2, a metes and
bounds survey by a licensed surveyor will be necessary. |
NA |
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Identify the type of unit/disposal area
(B.3.B.2(b)). |
The
site was located on a historical aerial photograph.
The site was reportedly used as a disposal area for fired small
arms ammunition brass. |
Yes |
NA |
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Identify design features (B.3.A.2(c)). |
Information
regarding design features was obtained during the Environmental Assessment
(ES, 1992) and through visual observation during the field investigation.
All available information regarding the design of the disposal site
is provided in Section 1.1.2.1. |
Yes |
NA |
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Identification of past and present operating
practices, period of operation, age of unit/disposal area, and method used
to close the unit/disposal area (B.3.B.2(d), (e), (f), and (h)). |
All
known information regarding these items is provided in Section 1.1.2. This information is from the Environmental Assessment,
records review, interviews, aerial photo review, and visual observations. |
To
the extent possible with data available. |
NA |
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Determine general physical conditions of the site
(B.3.B.2(g)) |
The
general physical condition of the site is presented in Section 1.2 |
Yes. |
NA |
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Identify waste characteristics, including type of
waste placed in the unit, physical and chemical characteristics of the
wastes, and migration and dispersal characteristics of the waste
(B.3.B.3). |
Records
regarding historic waste disposal practices at CSSA are very limited.
All known information, derived from the Environmental Assessment,
records review, interviews, and visual observations at the site is
provided in Section 1.2. |
Yes |
NA |
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Characterize the vertical and horizontal extent
of groundwater contamination. |
NA |
NA |
NA |
Contamination
Characterization – Groundwater (B.3.C.1) |
Determine vertical and horizontal extent of
contamination (B.3.C.2(a)). |
NA |
NA |
NA |
Contamination
Characterization – Soil (B.3.C.2) |
Describe contaminant and soil properties with the
contaminant source area, including contaminant solubility, speciation,
adsorption, leachability, exchange capacity, biodegradability, hydrolysis,
photolysis, oxidation, and other factors that might affect contaminant
migration and transformation (B.3.C.2(b)). |
NA |
NA |
NA |
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Describe soil properties (B.3.C.2(c)). |
See
“Characterization of Environmental Setting – Soils” above. |
Yes |
NA |
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Identify the direction of contaminant movement
(B.3.C.2(d)). |
NA |
NA |
NA |
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Extrapolate future contaminant movement
(B.3.C.2(e)). |
No
action |
NA |
NA |
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Implement a soil boring investigation to
determine the extent of soil contamination.
Soil gas monitoring will be performed during drilling of all
borings. Laboratory analysis of borings for contaminants of
potential concern will be performed on soils at depths where either visual
contamination is evident, or soil gas concentrations indicate
contamination. All boreholes
shall be properly abandoned. |
Not
included in this report for SWMU
B-5. A soil boring
investigation is not considered necessary for this site since there is no
evidence of buried waste. |
NA |
NA |
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Prepare a map of all areas included in the
investigation (B.3.C.2(i)). |
Figures
B5 1-4 show all areas included in the investigation |
Yes |
NA |
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All reporting limits should be below regulatory
criteria. |
RLs
were approved by TNRCC on October 5, 1999. RLs are considered RRS1
standards for all analytes except metals.
|
Yes |
NA |
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Perform all analyses in accordance with the AFCEE
QAPP. |
All
analyses were performed in accordance with the AFCEE QAPP and approved
variances. |
Yes |
NA |
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All
data flagged with “U”, “F”, or “J” are considered usable for
closure and site characterization purposes.
|
Yes |
NA |
Contaminant
Characterization – Sediment and Surface Water (B.3.C.3) |
Conduct a surface water and sediment
investigation to characterize contamination resulting from releases at the
Facility. |
No
surface water is present at the site.
All remaining samples from surface soils had no COCs detected above
background levels. |
Yes |
Closure |
Potential
Receptors (B.3.D). |
Collect
the information necessary to describe the human populations and
environmental systems that are susceptible to contaminant exposure from
the facility. |
Information
regarding receptors is provided in the Risk Assessment Technical Approach
Document (Volume 1-6). In
addition, the Well Research Report identifies private groundwater users
within 0.25-mile and public water suppliers within 0.5 mile of CSSA. |
Yes |
NA |