Isaac Aboulafia, P.E. Executive Vice President, C.O.O.

Transcription

1 MEC X A SERVICE-DISABLED VETERAN OWNED SMALL BUSINESS SUSTAINABLE REMEDIATION USING EX-SITU CHEMICAL OXIDATION ENABLING REDEVELOPMENT OF BROWNFIELD PROPERTY PRESENTED TO THE FLORIDA BROWNFIELDS ASSOCIATION, OCTOBER 29, 2013 Isaac Abulafia, P.E. Executive Vice President, C.O.O.

2 Cmpany Overview Independently wned, 35 emplyees, established 2002 Prfessinal certificatins: - P.E. (27 states & DC) ; P.G.; CHMM Registered cntractr in CA Prfessinal leaders: - AHMP, SAME, ITRC Headquarters in Hustn, TX, ther ffices in: New Braunfels, TX; Aurra, CO; Buffal, NY; Chicag, IL; and Edwards, CA Actively engaged: U.S.A. (federal & cmmercial), EU, Japan, China, Brazil Service-Disabled Veteran Owned Small Business (certified) GSA Envirnmental Schedule

3 Prject Challenges Tight matrices, NAPL, TOC Site cnstraints & eclgical cnsideratins Time t remediate and cst effectiveness Regulatry permitting Ttal mass destructin Objectives (business, technical, regulatry, cmmunity/scial..)

4 Sil Remediatin Hw lng? Hw much? Rebund?...get it dne Decisin drivers Cst Biremediatin/mass transfer technlgies Time excavatin and ff site dispsal Optimized time and cst excavatin and ex-situ chemical xidatin (ESCO)

5 Chemical Oxidatin Prcess Oxidant and reagent screening Cntinuus dsage refinement 1. Oxidant demand empirical mdeling (initial dsage determinatin) 2. Design Parameter Evaluatin (dsage refinement) 3. First/pilt field applicatin (dsage refinement) 4. Subsequent plishing field applicatin, if necessary

6 1. Oxidant Screening/Selectin Oxidant Vlts (1) Flurine (F) 3.0 Hydrxyl Radical (OH ) 2.7 Sulfate Radical (SO4 ) 2.6 Ozne (O 3 ) 2.4 Sulfate (S 2 O -2 8 ) 2.1 Hydrgen Perxide (H 2 O 2 ) 1.8 Permanganate (MnO 4- ) 1.7 Chlrine (Cl 2 ) 1.4 (1) = Prvided by FMC Crpratin Activatin methds fr sdium persulfate: Presence f transitin metal Heat (> 40 C) Hydrgen perxide (H 2 O 2 ) Alkaline cnditins (high ph) Ultravilet Prcess designed uses 4 f the 5 activatin methds synergistically: 1. Presence f transitin metal 2. Heat 3. Hydrgen perxide 4. Alkaline (+ph)

7 2. Labratry Treatability Test ISCO with radicals is nt slely stichimetric Ttal xidant demand (TOD) is determined via predictive empirical mdeling and labratry testing Oxidant demand and viability cnfirmed via parallel xidant frmulatin treatability tests Treatability test bjectives include: 1. Determine reactivity f the site media 2. Select the ptimum reagent frmulatin 3. Observe adverse reactins, if any

8 3./4. Safety and Prcess Mnitring Oxidant prperties Reactive with mst metals Highly acidic (ph < 2) Requires careful handling/use Chemical Strage: Stred in cl/dry area Hmgenized in vented, chemically cmpatible vessels Health 0 Flammability 1 1 Reactivity Temperature Pressure Reagent

9 Site Backgrund Frmer industrial facility Silty clay TPH (heating il/diesel) Debris and abandned building in sil Adjacent t eclgically sensitive bay

10 Prcess Optimizatin Technical gals 1. Enhance desrptin 2. Persistent xidatin 3. Maximize radical prductin 4. Ttal mass reductin Business Gals 1. Fast 2. Cst-Effective ESCO methd selected : sdium persulfate activated by sdium percarbnate and irn

11 Field Applicatin ESCO treatment cells 7 ttal 200 x 75 Lined Chemical reagents Applicatin: bradcasting Distributin: mixing Hydratin: high vlume water Wrking in wet sils with yellw irn

12 Sil Mixing Optins In-situ mixing Ex-situ agricultural mixing Lang Tl C. Vertical auger

13 NAPL Oil-Filled Pipes MISC. Debris Wd In-situ versus Ex-situ Encumbrances t in-situ mixing/treatment Physical bstructins Oxidant sinks

14 Hydratin

15 Mixing

16 Prcess Mnitring Real-time irn mnitring Real-time persulfate mnitring

17 OXIDANT/SOIL RATIO (lb/cy) % 0.20% 0.15% 0.10% 0.05% EFFICIENCY (lb xidant / [TPH]) 0 Lw (10,000 mg/kg TPH) Mid (30,000 mg/kg TPH) High (100,000 mg/kg TPH) 0.00% Oxidant Efficiency

18 TPH Mass Destructin 350, , , , , ,000 50,000 0 Lw (10,000 mg/kg TPH) Mid (30,000 mg/kg TPH) High (100,000 mg/kg TPH) Pst Pre

19 Cst The answer ESCO: $98/cy ($75/tn) Off-site landfil: $250-$300/cy (nt used) Savings : >$1.5 millin

20 Sustainable ChemOx Permanent cntaminant destructin (nt relcatin) Minimal and temprary infrastructure required Perfrmed n-site, eliminates trucking Shrt remediatin implementatin duratin (<3 weeks) Minimal electrical cnsumptin Uses elements/cmpunds fund in nature (sulfates, irn) Inncuus end prducts (CO 2, O 2 ) Remediates saturated and grundwater simultaneusly

21 Questins?? Isaac Abulafia, P.E. * cell x7008 ffice isaac.abulafia@mecx.net *P.E. in: FL, TX, NY, NJ, IN, IL, MI Califrnia-Licensed General Engineering Cntractr with Hazardus Substance Remval Certificatin MEC X 3203 Audley St Hustn, Texas