sandybeachroad_optimizationreport_april2014
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sandybeachroad_optimizationreport_april2014
ĂEPẠUnited States Environmental Protection AgencyOffice of Solid Waste and Emergency Response (5203P)EPA 542-R-14-003April 2014 www.epa.gov superfimd sandybeachroad_optimizationreport_april2014 remedytech www.clu-m.org optimizationRemedial Design-Stage Optimization Review ReportSandy Beach Ground Water Plume Superfund Site Tarrant County, Texas EP A Region 6Prepared for United StatesEnvironmental Protection AgencyPrepared by Tetra Tech. Inc. and GS1 Environmental. Inc.EXECUTIVE SUMMARYOpt sandybeachroad_optimizationreport_april2014imization BackgroundU.S. Environmental Protection Agency defines optimization as the following:“Efforts at any'phase of the removal or remedial responsandybeachroad_optimizationreport_april2014
se to identify and implement specific actions that improve the effectiveness and cost-efficiency of that phase. Such actions may also improve the remeĂEPẠUnited States Environmental Protection AgencyOffice of Solid Waste and Emergency Response (5203P)EPA 542-R-14-003April 2014 www.epa.gov superfimd sandybeachroad_optimizationreport_april2014se a systematic site review by a team of independent technical experts, apply techniques or principles from Green Remediation or Triad, or apply some other approaches to identify opportunities for greater efficiency and effectiveness. Contractors, states, tribes, the public, and PRPs are also encour sandybeachroad_optimizationreport_april2014aged to put forth opportunities for the Agency to consider.An optimization review considers the goals of the remedy, available site data, conceptual ssandybeachroad_optimizationreport_april2014
ite model (CS.M). remedy performance, protectiveness, cost-effectiveness and closure strategy'. A strong interest in sustainability has also developedĂEPẠUnited States Environmental Protection AgencyOffice of Solid Waste and Emergency Response (5203P)EPA 542-R-14-003April 2014 www.epa.gov superfimd sandybeachroad_optimizationreport_april2014remediation and environmental footprint reduction during optimization reviews.An optimization review includes reviewing site documents, interviewing site stakeholders, potentially visiting the site for one day, and compiling a report that includes recommendations in the following categories:•Protect sandybeachroad_optimizationreport_april2014iveness•Cost-effectiveness•Technical improvement•Site closure•Environmental footprint reductionThe recommendations are intended to help the site teamsandybeachroad_optimizationreport_april2014
identify opportunities for improvements in these areas. In many cases, further analysis of a recommendation, beyond that provided in this report, may ĂEPẠUnited States Environmental Protection AgencyOffice of Solid Waste and Emergency Response (5203P)EPA 542-R-14-003April 2014 www.epa.gov superfimd sandybeachroad_optimizationreport_april2014of the optimization review team. These recommendations do not constitute requirements for future action, but rather are provided for consideration by the EPA Region and other site stakeholders. Also note that while the recommendations may provide some details to consider during implementation, the r sandybeachroad_optimizationreport_april2014ecommendations are not meant to replace other, more comprehensive, planning documents such as work plans, sampling plans and quality assurance projectsandybeachroad_optimizationreport_april2014
plans (ỌAPP).■ U.S. Envircsunent 11 Protection Agency. 2012. Memorandum: Transinit-.nl of the National Strategy to Expand Superfund Optumzatico PractĂEPẠUnited States Environmental Protection AgencyOffice of Solid Waste and Emergency Response (5203P)EPA 542-R-14-003April 2014 www.epa.gov superfimd sandybeachroad_optimizationreport_april2014fund National Policy Managers (Regions 1 - 10). office of Solid Waste and Emergency Response (OSWER) 9200.3-75. September 28.Sandy Beach Rood Ground Water Plume SuperRmd SiteTarrant County. TexasRemedial Design-Stage Optimization Review ReportES-1Site-Specific Backgroundrhe Sandy Beach Road Ground W sandybeachroad_optimizationreport_april2014ater Plume Superfund site. CERCL1S ID No. TXN000605649. is located within incorporated areas of Pelican Bay and Azle. Texas and an unincorporated portsandybeachroad_optimizationreport_april2014
ion of 1 arrant County, Texas, lhe site is the location of a former unpermitted landfill where existing ravines were used to deposit waste and later bĂEPẠUnited States Environmental Protection AgencyOffice of Solid Waste and Emergency Response (5203P)EPA 542-R-14-003April 2014 www.epa.gov superfimd sandybeachroad_optimizationreport_april2014ce of drinking water. 1 he former landfill has since been converted to residential property' with significant open space. 1 he source area is currently owned by an innocent owner operator (1OO). The basis for taking action at the site is the exceedance of drinking water standards in private water we sandybeachroad_optimizationreport_april2014lls and in Pelican Bay public water supply (PWS) wells screened in the 1’aluxy Aquifer.hl 2004. the Texas Commission on Envữonmental Quality I1CEQ) resandybeachroad_optimizationreport_april2014
ported that pws wells in Pelican Bay. as well as private residential wells, were contaminated by TCE at concentrations exceeding the Maximum ContaminaĂEPẠUnited States Environmental Protection AgencyOffice of Solid Waste and Emergency Response (5203P)EPA 542-R-14-003April 2014 www.epa.gov superfimd sandybeachroad_optimizationreport_april2014e installed on the affected private water wells. The site was added to the National Priorities List (NPL) in 2005 and a remedial investigation (RD and feasibility study (FS) were finalized in 2011. The Record of Decision (ROD) was published in 2011. Water supply connections from the City of Azle dis sandybeachroad_optimizationreport_april2014tribution system have replaced all of the filtration systems, except for the residences located along Liberty School Road and one residence located onsandybeachroad_optimizationreport_april2014
Sandy Beach Road, to address exposure pathways associated With contaminated water supplies. In addition to providing clean water for residents, remedĂEPẠUnited States Environmental Protection AgencyOffice of Solid Waste and Emergency Response (5203P)EPA 542-R-14-003April 2014 www.epa.gov superfimd sandybeachroad_optimizationreport_april2014or P&T) remedy components. The Site IS currently in the remedial design phase.The optimization review team along with the site project managers and regional consultants conducted a site visit in April 2013. This site optimization review report includes recommendations based on review of site documen sandybeachroad_optimizationreport_april2014ts, finding of the site visit and meeting with EPA remedial project managers (RPM).Summary of C onceptual Site Model and Key FindingsIn site decisionsandybeachroad_optimizationreport_april2014
documents, the most likely source of contamination to soil and groundwater was identified as an unpermitted landfill that operated from 1958 to 1971 nĂEPẠUnited States Environmental Protection AgencyOffice of Solid Waste and Emergency Response (5203P)EPA 542-R-14-003April 2014 www.epa.gov superfimd sandybeachroad_optimizationreport_april2014stigations including a passive soil gas survey anil geophysical surveys. Histone records on the type and quantity of material buried at the site arc unavailable. Minimally invasive source characterization was performed to comply with the wishes of the current IOO.The optimization renew team has iden sandybeachroad_optimizationreport_april2014tified uncertainties about materials remaining in the source as a data gap in the GSM. The primary release mechanisms al the landfill is believed to bsandybeachroad_optimizationreport_april2014
e historic direct disposal of ICE into the ravines (RI. June 2011). however, the potential presence of intact drums of chlorinated solvents or other pĂEPẠUnited States Environmental Protection AgencyOffice of Solid Waste and Emergency Response (5203P)EPA 542-R-14-003April 2014 www.epa.gov superfimd sandybeachroad_optimizationreport_april2014nd the ravines, where TCT may volatilize or leach to groundwater. Shallow' soils consist of a mixture of silty to sand clays, clayey sands and silty sand. Saturation occurs at a depth below 70-75 feet below ground surface (ft bgs) in the source area. The precise distribution of ICE in shallow and sa sandybeachroad_optimizationreport_april2014turated soils, including Its distribution in soils of varying porosity (for example clays versus sands), is another data gap affecting the design of tsandybeachroad_optimizationreport_april2014
he source remedies.1 he Paluxy Aquifer IS a shallow water table aquifer underlying the former landfill. The Paluxy Aquifer generally has no more than ĂEPẠUnited States Environmental Protection AgencyOffice of Solid Waste and Emergency Response (5203P)EPA 542-R-14-003April 2014 www.epa.gov superfimd sandybeachroad_optimizationreport_april2014 Review ReportĂEPẠUnited States Environmental Protection AgencyOffice of Solid Waste and Emergency Response (5203P)EPA 542-R-14-003April 2014 www.epa.gov superfimdGọi ngay
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