Final Remedial Action Completion Report for the ... - Rvaap.org

Remedial Action Completion Report
June 2008
• 1,3-Dinitrobenzene – LL1mw084 (1.33 µg/L)
Remediation of Soils and Dry Sediments at RVAAP 08-11 (LLs 1-4)
Page 3-6
• 2,4,6-Trinitrotoluene – LL1mw084 (9.18 µg/L) and LL3mw238 (65.1 µg/L)
• 2,4-Dinitrotoluene – LL1mw084 (4.35 µg/L)
• 2-Amino-4,6-dinitrotoluene – LL1mw081 (0.553 µg/L J), LL1mw084 (15.8 µg/L J),
LL2mw267 (0.477 µg/L J) and LL3mw238 (2.84 µg/L)
• 4-Amino-2,6-dinitrotoluene – LL1mw081 (0.563 µg/L J), LL1mw084 (21.9 µg/L),
LL2mw267 (0.453 µg/L J) and LL3mw238 (26.6 µg/L and 26.3 µg/L )
• 4-Nitrotoluene - LL2mw267 (0.436 µg/L J)
• HMX – LL1mw084 (0.417 µg/L J) and LL3mw238 (1.49 µg/L)
• RDX – LL1mw084 (2.42 µg/L) and LL3mw238 (8.42 µg/L)
• 1,3,5-Trinitrobenzene (4.24 µg/L) and LL3mw238 (24 µg/L)
All of the aforementioned explosive compounds, with the exception of 4-nitrotoluene, were
detected at well LL1mw084. The well with the highest concentrations for the individual
explosive COCs was LL3mw238. Trinitrotoluene and RDX were above the Region 9 PRGs at
both well locations. No propellants were detected in any of the baseline groundwater samples.
3.2.8.4 Inorganics
In addition to MCLs and Region 9 PRGs, the inorganics detected above the laboratory reporting
limits were compared to facility-wide background criteria for filtered groundwater. Calcium,
magnesium, iron, potassium, and sodium were eliminated from this discussion as potential
on-site contaminants because they are considered essential nutrients. The following inorganic
elements were detected above the reporting limits and applicable background levels:
• Dissolved Arsenic – LL1mw081 (0.00102 mg/L), LL1mw082 (0.00191 mg/L),
LL1mw085 (0.000427 mg/L), LL2mw262 (0.000313 mg/L J and 0.000268 mg/L J),
LL2mw263 (0.0104 mg/L), LL2mw266 (0.00488 mg/L and 0.00554 mg/L), LL2mw267
(0.00438 mg/L), LL2mw269 (0.000623 mg/L J), LL3mw236 (0.000277 mg/L J),
LL3mw238 (0.000434 mg/L J), LL3mw239 (0.000981 mg/L J), LL4mw196 (0.00709
mg/L J), LL4mw197 (0.000268 mg/L J) and LL4mw198 (0.000421 mg/L J)
• Dissolved Antimony – LL1mw067 (0.00088 mg/L), LL1mw078 (0.000385 mg/L J),
LL1mw084 (0.000322 mg/L J), LL1mw085 (0.000432 mg/L J), LL2mw262 (0.000315
mg/L J and 0.000422 mg/L J), LL2mw266 (0.000452 mg/L J), LL2mw267 (0.000525
mg/L J), LL3mw239 (0.00053 mg/L J) and LL4mw197 (0.000333 mg/L J)
• Dissolved Barium – LL2mw269 (0.263 mg/L)
• Dissolved Beryllium – LL1mw084 (