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Remedial Action Completion Report June 2008 Remediation of Soils and Dry Sediments at RVAAP 08-11 (LLs 1-4) Page 4-2 facility requirements ultimately dictated the sample frequency and analyses performed for the soil stockpiles. Waste samples were collected at a minimum of one sample per stockpile which translated into a frequency of greater than one sample per 700 cubic yards of material excavated. In all, a total of 13 waste characterization samples were analyzed for the following parameters: • Toxicity Characteristic Leaching Procedure (TCLP) analysis for inorganics, mercury, pesticides, herbicides, and SVOCs • PCBs • Nitroaromatics and nitramines • RCRA characteristics (reactive cyanide and sulfides, pH, and ignitability) Analytical results for all the waste characterization samples collected from the excavated soil stockpiles did not identify any of the soils to be hazardous. No local disposal facilities were permitted to accept soils with known PCB concentrations greater than 50 mg/kg; therefore, in order to be conservative, the soil stockpiles with the known concentrations of PCBs greater than 40 mg/kg were shipped to an out-of-state facility that was permitted to accept the material. A summary of waste characterization analytical results for the soil stockpiles are presented in the data tables (Table B-5) in Appendix B. The laboratory reports and associated data evaluation reports for waste characterization samples are in Appendix H included as an electronic attachment to this RACR. 4.1.3 Load-Out to the Disposal Facility Stockpiled soils and dry sediments were loaded into trucks in designated areas only with adequate spill control measures, including equipment to catch and contain spillage, and equipment necessary to recover spillage and clean the area. Dust control measures were implemented as necessary during loading. Disposable sheeting was placed on the ground around trucks to catch any incidental spillage during loading. Before loading, trucks were inspected and surveyed for damage and residual contamination by Shaw personnel. Materials were loaded into each transport vehicle in a uniform manner and distributed over the full length of the vehicle. Once loading was complete, the truck was inspected from the ground for loose or escaping soil or leaching water before leaving the load-out area. The load was then covered with a tarp or other suitable covering using an automated pull-over mechanism from within the truck cab or a manual hand-crank. Only authorized personnel performed the inspection and all truck drivers were directed to remain in their vehicle until the vehicle had been properly decontaminated and had left the load-out area. Vehicle tires were brushed prior to leaving the load-out area to minimize tracking of soils to other areas within and outside each load line. The soil transportation vehicles were tare and weighed before and after soils loading, respectively. The trucks were weighed at a nearby off-site truck-scale at Route 5 Sand & Gravel, located approximately one mile west of the RVAAP. Federal Department of Transportation (DOT) regulations were followed during transport activities. The soil was DOT classified based on direct sample results or on previously collected data. The labeling requirements outlined in the WMMP (Shaw 2006g) were followed to meet all *** FINAL***
Remedial Action Completion Report June 2008 Remediation of Soils and Dry Sediments at RVAAP 08-11 (LLs 1-4) Page 4-3 appropriate placards, waste manifests, bill of lading, and letter of approval requirements to transport contaminated soil from the RVAAP. 4.2 LIQUID WASTES Liquid waste consisted of laboratory waste solvents associated with on-site field screen activities, monitoring well development and purge liquids, equipment decontamination fluids, and precipitation accumulated in protected excavation areas. Liquid wastes were segregated by waste streams. 4.2.1 Contained Liquids for Off-Site Disposal The generated laboratory waste was collected in a 5-gallon sealed plastic bucket. The monitoring well development and purge water and equipment decontamination liquids were collected and pumped directly into labeled, DOT-approved 55-gallon drums. The containers were properly labeled to indicate the dates generated and their contents and were stored at the RVAAP drum storage area at Building 1036. All liquids wastes were disposed at an approved off-site disposal facility. The laboratory waste pail was not sampled since it contained solvents of known concentrations and was pre-determined to be a hazardous waste. The drums of purged groundwater and decontamination liquids were analyzed for waste characterization purposes and analytical results did not identify any of the drummed liquids as hazardous. Liquids wastes were generated and handled in accordance with the requirements of the WMMP (Shaw 2006g). A summary of analytical results for the waste liquids generated are presented in the data tables (Table B-6 and B-7) in Appendix B. The laboratory report and associated evaluation report for the waste liquids are presented in Appendix I included as an electronic attachment to this RACR. 4.2.1 Excavation Storm Water In general, any precipitation that collected in excavations were allowed to dissipate prior to continuing excavation or backfilling with the exception of one excavation location, LL2ss-066-cs, in LL 2. Precipitation had continued to collect in this excavation over several large rain events. Due to the clay nature of the soils and continuing precipitation, the collected storm water was not dissipating and was encroaching upon the project schedule. Any ground surface discharges are subject to strict state, federal, and RVAAP-specific discharge conditions; in order to expedite the removal of the storm water, Shaw coordinated sampling and direct discharge to ground surface with USACE, the Ohio EPA, and the RVAAP. The storm water was sampled for the COCs of concern in the excavation, TAL inorganics, in addition to explosives and SVOCs. Analytical results did not identify any contaminants above the RVAAP water quality standards and the storm water was approved for discharge directly to ground surface by the Ohio EPA, USACE, and the RVAAP. A summary of analytical results for the storm water discharged are presented in Table B-8 Appendix B. The laboratory report and associated evaluation report for discharged storm water are presented in Appendix J in the electronic attachment to this RACR. *** FINAL***
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