{"id":989763,"date":"2022-11-16T15:31:26","date_gmt":"2022-11-16T18:31:26","guid":{"rendered":"https:\/\/biogroup.com.ar\/remediation-of-contaminated-sites\/"},"modified":"2026-05-19T11:55:33","modified_gmt":"2026-05-19T14:55:33","slug":"remediation-of-contaminated-sites","status":"publish","type":"page","link":"https:\/\/biogroup.com.ar\/en\/remediation-of-contaminated-sites\/","title":{"rendered":"Sites Remediation"},"content":{"rendered":"\t\t
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<\/div>\n
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\n \ud83c\udf31 Bioremediation \u00b7 ISCO \u00b7 Landfarming \u00b7 MNA \u00b7 SVE \u00b7 Phytoremediation \u00b7 RBCA \u00b7 Phase I\u2013IV\n <\/div>\n

\n Remediation of Contaminated Sites<\/span>\n <\/h1>\n

\n From site characterisation and risk assessment through technology selection,\n construction and closure certification \u2014 a complete, results-oriented service.\n <\/p>\n

\n Most industrial activities generate environmental damage \u2014 caused by inadequate\n waste management, improper raw material storage or accidental spills \u2014 allowing\n pollutants to reach soil and groundwater. Biogroup has \n 35 years of uninterrupted experience<\/strong> in site diagnosis, risk assessment,\n remediation project design, construction management and site closure.\n <\/p>\n

\n Our Engineering Area integrates field investigation, our own certified laboratory,\n RBCA risk assessment and the full range of in situ and ex situ corrective action\n technologies \u2014 delivering on time and within budget with proactive regulatory dialogue.\n <\/p>\n

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9 technologies<\/div>\n
In situ + ex situ<\/div><\/div>\n
Own laboratory<\/div>\n
Integrated field\u2013lab\u2013engineering<\/div><\/div>\n
RBCA \u00b7 Phase I\u2013IV<\/div>\n
Full project cycle<\/div><\/div>\n
+35 years<\/div>\n
Contaminated site expertise<\/div><\/div>\n <\/div>\n <\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\ud83c\udfaf<\/div>
Customer-aligned strategy<\/div>
Remediation strategy tailored to the client's land-use objectives, timeline and budget \u2014 not a one-size-fits-all technology prescription.<\/div><\/div>
\ud83e\udd1d<\/div>
Proactive regulatory dialogue<\/div>
Constructive engagement with environmental authorities that satisfies both technical requirements and regulatory expectations.<\/div><\/div>
\ud83d\udcb0<\/div>
Cost-effective corrective action<\/div>
Realistic plans that minimise costs and maximise effort allocation \u2014 applying the right technology at the right scale for the specific site conditions.<\/div><\/div>
\ud83d\udcc5<\/div>
On time and within budget<\/div>
Delivery against the original proposal, schedule and budget \u2014 with transparent reporting throughout the project lifecycle.<\/div><\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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<\/div>\n Engineering area services \u2014 the complete project cycle<\/span>\n
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\n Biogroup's Engineering Area \u2014 from the first site visit to regulatory closure certification<\/div>\n
\n A single team manages all phases \u2014 investigation, risk assessment, remediation design,\n construction supervision and analytical monitoring \u2014 eliminating the coordination failures\n that arise when multiple independent consultants work in sequence.<\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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I<\/span>
Phase I \u2014 Historical Study<\/div><\/div><\/div>
Review of historical uses, aerial photographs, regulatory databases and prior site records to identify Recognised Environmental Conditions (RECs). ASTM E1527 methodology. No intrusive work.<\/div><\/div>
\ud83d\udccd<\/span>
Baseline Determination<\/div><\/div><\/div>
Pre-project or pre-construction environmental baseline \u2014 soil and groundwater quality before any contamination-generating activity. The reference point for all subsequent impact and remediation assessments.<\/div><\/div>
II<\/span>
Phase II \u2014 Site Characterisation<\/div><\/div><\/div>
Design and execution of intrusive sampling programmes for soil and groundwater. Sampling plan design, field investigation (borings, phreatimeters), analysis at Biogroup's own laboratory, contaminant mapping.<\/div><\/div>
\ud83d\udcca<\/span>
Preliminary Site Reports<\/div><\/div><\/div>
Rapid preliminary assessment reports for regulatory notifications, transaction support or emergency response \u2014 summarising available data against applicable screening criteria before full characterisation is complete.<\/div><\/div>
\ud83d\udccb<\/span>
Periodic Monitoring Reports<\/div><\/div><\/div>
Scheduled analytical monitoring reports during active remediation \u2014 documenting contaminant concentration trends, remediation system performance and progress toward cleanup goals.<\/div><\/div>
\ud83c\udf31<\/span>
Biotreatability Studies & Pilot Trials<\/div><\/div><\/div>
Laboratory-scale and pilot-scale feasibility studies to determine the treatability of site-specific contaminated soils and groundwater using biological and chemical technologies before committing to full-scale remediation.<\/div><\/div>
III<\/span>
Phase III \u2014 Remediation Project<\/div><\/div><\/div>
Risk assessment (RBCA), cleanup goal establishment (NGR\/GRL), technology selection, engineering design, cost-benefit analysis and regulatory submission. ASTM E1739\/E2081 framework.<\/div><\/div>
\ud83c\udfd7\ufe0f<\/span>
Infrastructure Construction<\/div><\/div><\/div>
Construction management for all physical remediation infrastructure \u2014 landfarming cells, biopile structures, ISCO injection systems, SVE well networks, pump-and-treat systems and ex situ treatment units.<\/div><\/div>
\ud83d\udd2c<\/span>
In-house Analytical Laboratory<\/div><\/div><\/div>
All soil, water and subsoil gas samples analysed at Biogroup's own certified and accredited laboratory. Full contaminant panel per Ley 24.051 Table 9 \u2014 GC-MS, ICP-MS, HPLC-MS\/MS. No outsourcing.<\/div><\/div>
\u2696\ufe0f<\/span>
RBCA Risk Assessment<\/div><\/div><\/div>
Risk-Based Corrective Action under ASTM E1739\/E2081 \u2014 establishing site-specific maximum admissible concentrations and Generic Reference Levels (NGR) that define legally defensible cleanup targets.<\/div><\/div>
\ud83e\udd1d<\/span>
Environmental Due Diligence<\/div><\/div><\/div>
Phase I\/II assessments for purchase-sale transactions \u2014 environmental liability identification and quantification for price adjustment, indemnification clause and transaction risk management.<\/div><\/div>
\ud83c\udfc1<\/span>
Site Closure Certification<\/div><\/div><\/div>
Preparation of closure dossier, demonstration that cleanup goals have been achieved, regulatory submission and formal site closure certification from environmental authorities.<\/div><\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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<\/div>\n Remediation technologies \u2014 in situ and ex situ<\/span>\n
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\n Technology selection is the most critical decision in contaminated site management<\/div>\n
\n No single technology works for all contaminants and site conditions. Biogroup selects\n the technology \u2014 or combination of technologies \u2014 that best matches the specific\n contamination type, matrix properties, cleanup goal, timeline and budget.\n Selection is always preceded by treatability studies and pilot trials.<\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\ud83e\udda0 Biological technologies \u2014 harnessing microbial metabolism<\/div>\n
Best for: petroleum hydrocarbons (BTEX, TPH) \u00b7 PAHs \u00b7 chlorinated solvents (reductive dechlorination)<\/div>\n <\/div>\n
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\ud83c\udf3f Bioremediation<\/div>\n
Enhancement of indigenous microbial degradation of organic contaminants under monitored conditions \u2014 temperature, oxygen\/electron donor supply, nutrients, pH. Applied to petroleum-contaminated soils and groundwater in situ or ex situ.<\/div>\n <\/div>\n
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\ud83e\uddec Bioaugmentation & Biostimulation<\/div>\n
Biostimulation:<\/strong> addition of electron donors, acceptors (O\u2082, nitrate, sulphate) or nutrients to stimulate indigenous microbial populations.
Bioaugmentation:<\/strong> inoculation with specialised bacterial cultures (e.g. Dehalococcoides<\/em> for reductive dechlorination of TCE\/PCE).<\/div>\n <\/div>\n
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\ud83c\udf21\ufe0f Monitored Natural Attenuation (MNA)<\/div>\n
Documented reliance on naturally occurring physical, chemical and biological processes to achieve cleanup goals. Requires robust monitoring network and quantitative evidence of active attenuation. The most cost-effective option when contaminant mass and flux support the case.<\/div>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\ud83c\udfd7\ufe0f Ex situ soil technologies \u2014 excavate and treat<\/div>\n
Best for: surface soil contamination \u00b7 accessible source zones \u00b7 limited area \/ high-concentration hot spots<\/div>\n <\/div>\n
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\ud83c\udf3e Landfarming<\/div>\n
Excavation and spreading of contaminated soil in a lined treatment cell. Periodic tilling to aerate and mix soil, with addition of nutrients and moisture as required. Biodegradation by indigenous aerobic microorganisms. Effective for petroleum hydrocarbons (TPH, DRO, MRO) at moderate concentrations.<\/div>\n <\/div>\n
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\ud83d\udce6 Composting & Biopiles<\/div>\n
Excavated contaminated soil is piled and amended with bulking agents (straw, wood chips), nutrients and moisture. Aeration through perforated pipe network. Higher treatment intensity than landfarming \u2014 suitable for higher-concentration petroleum hydrocarbon contamination. Enclosed variants provide VOC emission control.<\/div>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\u2697\ufe0f In situ chemical technologies \u2014 treat without excavation<\/div>\n
Best for: NAPL source zones \u00b7 deep contamination \u00b7 chlorinated solvents \u00b7 rapid mass reduction<\/div>\n <\/div>\n
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\ud83d\udd34 In Situ Chemical Oxidation (ISCO)<\/div>\n
Direct injection of chemical oxidants into the subsurface to destroy organic contaminants in place. Common oxidants: permanganate (KMnO\u2084), persulphate (activated with heat, alkali or Fe\u00b2\u207a), hydrogen peroxide \/ Fenton's reagent, ozone. Effective for BTEX, PAHs, chlorinated solvents and NAPL source zones. Rapid mass reduction.<\/div>\n <\/div>\n
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\ud83d\udd35 In Situ Chemical Reduction (ISCR)<\/div>\n
Injection of zero-valent iron (ZVI), emulsified ZVI (EZVI) or other reducing agents. Drives reductive dechlorination of chlorinated solvents (PCE\u2192TCE\u2192DCE\u2192VC\u2192ethene) abiotically. Also applied to hexavalent chromium Cr(VI) reduction to non-toxic Cr(III). Can be combined with bioaugmentation for enhanced biotic\/abiotic pathways.<\/div>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\ud83c\udf3f Additional technologies<\/div>\n
Phytoremediation \u00b7 soil vapour extraction (SVE) \u00b7 solidification\/stabilisation \u00b7 pump-and-treat<\/div>\n <\/div>\n
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\ud83c\udf33 Phytoremediation<\/div>\n
Use of plants to extract, degrade or immobilise contaminants. Phytoextraction of metals (Cd, Zn, Ni), rhizodegradation of petroleum hydrocarbons, phytostabilisation of arsenic.<\/div>\n <\/div>\n
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\ud83d\udca8 Soil Vapour Extraction (SVE)<\/div>\n
In situ extraction of volatile and semi-volatile contaminants from the unsaturated zone through vacuum-applied wells. Effective for petroleum GRO, BTEX, chlorinated solvents in vadose zone soils.<\/div>\n <\/div>\n
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\ud83e\uddf1 Solidification \/ Stabilisation<\/div>\n
Immobilisation of contaminants (metals, semi-volatile organics) by mixing with binders (Portland cement, lime, fly ash). Reduces leachability and mobility \u2014 applied to materials that cannot be treated by biological or chemical methods.<\/div>\n <\/div>\n
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\ud83d\udca7 Pump-and-Treat<\/div>\n
Extraction of contaminated groundwater, above-ground treatment (air stripping, activated carbon, biological) and discharge or re-injection. Hydraulic containment of plume expansion while mass removal proceeds.<\/div>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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<\/div>\n Technology selection \u2014 matching the right approach to contaminant and site<\/span>\n
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\n Primary contaminants and preferred remediation technologies<\/div>\n <\/div>\n
\n \n \n \n \n
Contaminant type<\/th>\n Primary technology<\/th>\n Secondary \/ combination<\/th>\n Key consideration<\/th>\n <\/tr>\n <\/thead>\n
TPH (petroleum) in soil<\/td>Landfarming \u00b7 Biopiles<\/td>Biostimulation \u00b7 SVE (GRO fraction)<\/td>Concentration, depth, fractions<\/td><\/tr>
BTEX in groundwater<\/td>Biostimulation \u00b7 MNA<\/td>ISCO (permanganate) \u00b7 Air sparging<\/td>Plume size and receptor proximity<\/td><\/tr>
Chlorinated solvents (PCE\/TCE)<\/td>ISCO (persulphate) \u00b7 ISCR (ZVI)<\/td>Bioaugmentation (Dehalococcoides)<\/td>Reductive vs. oxidative pathway<\/td><\/tr>
PAHs in soil<\/td>Biopiles \u00b7 Bioremediation<\/td>Phytoremediation (low concentration)<\/td>Bioavailability decreases with age<\/td><\/tr>
Heavy metals in soil<\/td>Solidification\/Stabilisation<\/td>Phytoextraction (Cd, Zn, Ni)<\/td>Metals cannot be destroyed<\/td><\/tr>
NAPL source zone<\/td>ISCO \u00b7 Thermal treatment<\/td>ISCR \u00b7 Pump-and-treat<\/td>Free phase vs. residual NAPL<\/td><\/tr>
Cr(VI) in groundwater<\/td>ISCR (ZVI \u00b7 ferrous sulphate)<\/td>PRB (permeable reactive barrier)<\/td>Reduction to non-toxic Cr(III)<\/td><\/tr>
Mixed organic\/inorganic<\/td>Phased approach<\/td>Biological then S\/S for metals<\/td>Sequential treatment<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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<\/div>\n Biotreatability studies and pilot trials \u2014 de-risking remediation investment<\/span>\n
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\ud83e\uddea Laboratory treatability studies<\/div>\n <\/div>\n
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\n Laboratory-scale feasibility studies conducted on actual site soil and water\n samples \u2014 before any full-scale remediation design commitment. Confirm whether\n the proposed technology will achieve the required cleanup goal under site-specific\n conditions.<\/div>\n
\n \u2713 Microcosm studies \u2014 indigenous biodegradation potential
\n \u2713 Rate constant determination \u2014 first-order and Michaelis-Menten kinetics
\n \u2713 Electron donor\/acceptor optimisation
\n \u2713 ISCO reagent screening \u2014 oxidant demand and effectiveness
\n \u2713 Solidification\/stabilisation TCLP pass\/fail testing
\n \u2713 Phytotoxicity testing for phytoremediation feasibility\n <\/div>\n <\/div>\n <\/div>\n
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\ud83c\udfd7\ufe0f Field pilot trials<\/div>\n <\/div>\n
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\n Pilot-scale implementation at one sector of the site to confirm performance\n under actual field conditions \u2014 before committing to full-scale construction.\n Generates the operational data needed to size the full-scale system.<\/div>\n
\n \u2713 Landfarming cell \u2014 treatment rate under field temperature and moisture
\n \u2713 ISCO injection test \u2014 reagent distribution radius of influence
\n \u2713 SVE pilot \u2014 vacuum influence radius and mass extraction rate
\n \u2713 Bioaugmentation \u2014 culture establishment and dechlorination confirmation
\n \u2713 Pilot monitoring with Biogroup's own laboratory
\n \u2713 Regulatory acceptance of pilot data for full-scale design approval\n <\/div>\n <\/div>\n <\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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<\/div>\n Typical applications<\/span>\n
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\u26fd<\/div>
Petrol stations & fuel spills<\/div>
The most frequent contaminated site type in Argentina. TPH, BTEX and MTBE in soil and groundwater from UST leaks. Full cycle from Phase I\/II to ISCO or bioremediation closure.<\/div><\/div>
\ud83c\udfed<\/div>
Industrial plant closures<\/div>
Characterisation and remediation of decades of industrial activity \u2014 petroleum hydrocarbons, solvents, metals, PCBs \u2014 for regulatory closure and site redevelopment.<\/div><\/div>
\ud83d\udd29<\/div>
Metal finishing & electroplating<\/div>
Hexavalent chromium (Cr(VI)) and heavy metal plumes in soil and groundwater. ISCR for in situ Cr(VI) reduction.<\/div><\/div>
\ud83e\uddea<\/div>
Solvent-contaminated sites<\/div>
Chlorinated solvent (TCE\/PCE\/DCE) dense non-aqueous phase liquid (DNAPL) \u2014 the most technically challenging remediation scenario. ISCO, ISCR and bioaugmentation.<\/div><\/div>
\ud83c\udf3e<\/div>
Agro-industrial sites<\/div>
Pesticide residues, herbicides and process waste contamination from soy, maize and vegetable oil processing facilities.<\/div><\/div>
\ud83c\udfd7\ufe0f<\/div>
Pre-transaction due diligence<\/div>
Phase I and Phase II for M&A environmental liability quantification and purchase price allocation.<\/div><\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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<\/div>\n Official registrations<\/span>\n
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Provincial registry<\/div>\n
Official Registry of Environmental Consultants, Experts and Expert Witnesses<\/div>\n
Province of Santa Fe, Argentina<\/div>\n <\/div>\n
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Ministerial registry<\/div>\n
Registry of Environmental Impact Assessment Consultants<\/div>\n
Ministry of Environment, Argentina<\/div>\n <\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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<\/div>\n Related services<\/span>\n
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\ud83c\udf3f Environmental Passives \u2192<\/div>
Phase I \u00b7 II \u00b7 RBCA \u00b7 ASTM E1527 \u00b7 due diligence<\/div><\/a>
\ud83c\udf0d Geology & Hydrogeology \u2192<\/div>
Phreatimeters \u00b7 MODFLOW \u00b7 RT3D \u00b7 VES<\/div><\/a>
\ud83c\udfde\ufe0f Soil Monitoring \u2192<\/div>
TPH \u00b7 BTEX \u00b7 metals \u00b7 PAHs \u00b7 Table 9<\/div><\/a>
\ud83d\udca7 Underground Water \u2192<\/div>
Groundwater \u00b7 phreatimeters \u00b7 Table 2<\/div><\/a>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\n Bioremediation \u00b7 ISCO \u00b7 Landfarming \u00b7 MNA \u00b7 SVE \u00b7 RBCA \u00b7 Phase I\u2013IV\n <\/div>\n
\n Need to remediate a contaminated site?<\/div>\n
\n From a preliminary Phase I assessment to full-scale bioremediation or ISCO\n implementation and regulatory site closure \u2014 Biogroup delivers on time and\n within budget with proactive regulatory dialogue.\n <\/div>\n \n Request a site remediation consultation \u2192<\/a>\n
\n \ud83d\udcde +54 341 425-6431<\/span>\n \ud83d\udcde +54 341 447-4486<\/span>\n \u2709 biogroup@biogroup.com.ar<\/span>\n \ud83d\udccd 3 de febrero 920 \u00b7 Rosario, Argentina<\/span>\n Mon\u2013Fri 08:00\u201317:00<\/span>\n <\/div>\n <\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

🌱 Bioremediation \u00b7 ISCO \u00b7 Landfarming \u00b7 MNA \u00b7 SVE \u00b7 Phytoremediation \u00b7 RBCA \u00b7 Phase I\u2013IV Remediation of Contaminated Sites From site characterisation and risk assessment through technology selection, construction and closure certification \u2014 a complete, results-oriented service. Most industrial activities generate environmental damage \u2014 caused by inadequate waste management, improper raw material storage…<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"inline_featured_image":false,"_joinchat":[],"footnotes":""},"class_list":["post-989763","page","type-page","status-publish","hentry"],"yoast_head":"\nSites Remediation - BioGroup<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/biogroup.com.ar\/remediacion-de-pasivos\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sites Remediation - BioGroup\" \/>\n<meta property=\"og:description\" content=\"🌱 Bioremediation \u00b7 ISCO \u00b7 Landfarming \u00b7 MNA \u00b7 SVE \u00b7 Phytoremediation \u00b7 RBCA \u00b7 Phase I\u2013IV Remediation of Contaminated Sites From site characterisation and risk assessment through technology selection, construction and closure certification \u2014 a complete, results-oriented service. 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