Central Florida Drum Brownfield Site Winter Springs, Florida

Transcription

1 Central Florida Drum Brownfield Site Winter Springs, Florida

2 Site History Mixed Use Setting Early 1940s Through Late 1980s Citrus Groves Central Florida Drum (Cleaning/Refurbishing) Polymetrics, Inc. (Industrial Paint Manufacturing) Dayscape Landscaping and Residential December 2007 BSRA Executed Between LD Plante and FDEP June 2015 Standard Pacific of Florida Purchases Property Late 2015 Standard Pacific Merges With CalAtlantic Homes May 2017 Tuskawilla Crossing Site Development Begins

3 Site History April 2013 Phase I ESA Drum Cleaning Consisted of Caustic Bath Cleaning (1965 through 1970) Chlorinated Solvent Impacts Later Drum Cleaning Consisted of Mechanical Process With Thermal Treatment (1971 through 1986) Former Onsite Petroleum UST Release Achieved Conditional Closure in July 2012 from Seminole County Current Onsite Storage of Pesticides and Herbicides Northwest Adjacent LUST Site (Mobil Filling Station)

4 Site History

5 Site Assessment Assessment Activities Began In 1997 Supplemental Assessments Conducted by Universal In May and September/October 2013 Primary COCs In Soil for Primary Area of Concern (PAC) Include Pesticides, Metals, BaP, and PCBs Above RSCTLs Primary COCs In Groundwater Include PCE and TCE Above GCTLs and NADCs Soil Impacts Defined to PAC of 4.5 Acres and Area 1B of 3.43 Acres Groundwater Impacts Confirmed to be Consistent With Historic Assessments (North of Warehouse Building)

6 Site Assessment

7 Site Assessment

8 Limited Scope Remedial Action Plan 2013 Previous Consultant Plan Recommended Biostimulation Combined With Bioaugmentation Remedial Approach Would Raise ph and With the Addition of Amendments and Bacteria to Create Reductive Dechlorination Plan Was Not Viable Due to Length of Time for Dechlorination Process Needed to Begin Redevelopment and the Likelihood of Long-term Groundwater Monitoring

9 Limited Scope Remedial Action Plan Universal Proposed In-Situ Chemical Reduction Technology for Groundwater Treatment Dual Blend of Persulfate (Na 2 S 2 O 8 ) as an In-Situ Oxidation Agent to Destroy COCs Regenesis Developed the Amendment Using PersulfOx TM Products Specific for the Site Proposed Injections in a Grid Fashion Within High Concentration COC Areas (Existing Sparge Points and Additional Hydraulic Push Injection Points) FDEP Approved LSRAP in November 2014 LSRAP Implemented September Through November 2015 (Groundwater) LSRAP Implementation Report Approved By FDEP In May 2016 (Groundwater)

10 Limited Scope Remedial Action Plan

11 Limited Scope Remedial Action Plan

12 Limited Scope Remedial Action Plan

13 Limited Scope Remedial Action Plan

14 Limited Scope Remedial Action Plan

15 Limited Scope Remedial Action Plan Quarterly Groundwater Monitoring Conducted After Injection Events to Evaluate COC Reduction Surficial, Intermediate, and Deep Saturated Zones Were Monitored for Approximately One Year TCE No Longer Present in Surficial Zone TCE and PCE Above GCTLs in Only Two Monitoring Wells In the Intermediate Zone But Not Above the NADCs

16 Limited Scope Remedial Action Plan No COCs Above GCTLs in Deep Zone Groundwater Monitoring Completed in February 2017 April 19, 2017 FDEP Approves Completion of Groundwater Monitoring Program and Monitoring Well Network is Abandoned Part of Conditional Closure For the Site Through Groundwater Use Restrictions, Including a Portion of the Bike Trail Owned by the State

17 Impacted Soil Excavation Plan PAC is an Approximate 4.5 Acre Area COCs Include Pesticides, Metals, BaP, and PCBs Above RSCTLs and Are Near Surface to Greater Than 4 Feet Deep Area 1B is an Approximate 3.43 Acre Area COCs Include BaP and Arsenic Above RSCTLs and Are Near Surface Up to 4 Feet Deep Both PAC and Area 1B Delineated; With Buffer Zone Around PAC Soil Management During Construction so Impacted Soils From Area 1B Could be Relocated to PAC

18 Impacted Soil Excavation Plan Estimated Excavation Footprint of 9,694 CY (13,571 Tons) Estimated 498 CY (697 Tons) of Asphalt for Disposal Estimated 9,196 CY (12,874 Tons) of Soil Relocated From Area 1B to PAC Excavation to be Conducted in Lifts From 2 Feet BGS to 4 Feet BGS Across Area 1B PAC to be Capped With 2 Feet of Clean Fill and Engineering Controls For Conditional Site Closure From FDEP, Which Includes a Park and Pool Complex Closure of Six Artesian Water Wells To Be Completed in 2017 in Conjunction With Site Development Activities

19 Impacted Soil Excavation Plan

20 Impacted Soil Excavation Plan

21 Impacted Soil Excavation Plan

22 Brownfield Benefits Fills Gap in Area of Residential Development Preservation of Wetland and Wildlife to Area Incorporates Existing Infrastructure (i.e. Trotwood Park, Cross Seminole Trail, Schools, and Downtown Winter Springs) Into Development Plan 2014 Brownfield Tax Credit = $142, Brownfield Tax Credit = $59, Brownfield Tax Credit = TBD; Est. $65,000 Plus Creation of 5-7 Jobs for Residential Development Management Creation of Jobs for Commercial Development Business

23 Future Use Tuskawallia Crossing Residential Development Approximately 379 Residential Units Club House/Pool Area (Engineering Control) Preserve Nature and Wetland Areas Cross Seminole Trail Improvements Small Commercial Development

24 Future Use A PAC Area 1B

25 Future Use Area 1B Soil Removal

26 Future Use Relocated Soil to POC Excavation Control Point

27 Future Use Tie-In for Clean Soil Tie-In for Impacted Soil PAC

28 Future Use

29 Future Use

30 Future Use

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