[DUE DILIGENCE & CERCLA AAI]

PHASE I & II ENVIRONMENTAL SITE ASSESSMENTS

ASTM E1527-21 STANDARD • RECOGNIZED ENVIRONMENTAL CONDITIONS (RECs) • INNOCENT LANDOWNER DEFENSE

Commercial acquisitions, industrial redevelopments, and municipal transactions require rigorous due diligence to satisfy CERCLA All Appropriate Inquiries (AAI). Envirogyn executes comprehensive environmental audits to shield purchasers, lenders, and portfolio managers from catastrophic liability.

SITE RECON // ACTIVE Environmental Consulting and Phase I ESA Historical Blueprint Reconnaissance

ENVIRONMENTAL AUDIT // NON-INTRUSIVE RECON

PHASE I ESA (ASTM E1527-21)

Full-spectrum historical and regulatory investigation to satisfy CERCLA All Appropriate Inquiries (AAI) and establish innocent landowner defense.

Historical Audits: Aerial photos, city directories, and Sanborn fire insurance maps.
Agency Records: Comprehensive TCEQ and EPA regulatory database searches.
Field Recon: Physical site inspection to delineate RECs, CRECs, and HRECs.

STANDARD: ASTM E1527-21 CERCLA AAI COMPLIANT

SUBSURFACE SAMPLING // INTRUSIVE BORINGS

PHASE II ESA (SUBSURFACE SAMPLING)

Targeted intrusive subsurface investigation deployed when Recognized Environmental Conditions require empirical quantification.

Direct-Push Borings: Geoprobe soil continuous coring and geologic logging.
Groundwater Testing: Temporary monitoring well installation and hydrologic profiling.
Vapor Intrusion: Sub-slab vapor pins analyzed for VOCs, SVOCs, and TPH plumes.

MATRICES: SOIL • WATER • VAPOR DELINEATION & RISK QUANTIFICATION

[FORENSIC BUILDING DIAGNOSTICS]

MOLD ASSESSMENT & PROTOCOL DESIGN (MAC #1544)

TEXAS OCCUPATIONS CODE CH 1958 • CONFLICT-FREE STATUTORY SEPARATION • IICRC S520

Under Texas Administrative Code Title 16, Part 4, Chapter 78, any mold remediation project exceeding 25 contiguous square feet requires an independent Mold Remediation Protocol authored by a licensed Mold Assessment Consultant (MAC). Envirogyn enforces absolute statutory independence: we diagnose and specify the protocol, but we never perform the remediation on the same building.

PROTOCOL STAGE // DIAGNOSTIC TRIAGE

FORENSIC MOISTURE & IAQ TRIAGE

Non-destructive moisture mapping and bioaerosol impaction to uncover hidden active microbial reservoirs.

Thermal Diagnostics: Calibrated FLIR infrared radiometry and dielectric impedance scanning.
Air Sampling: Volumetric spore trap impaction adhering to ASTM D7391-20.
Surface Testing: Direct microscopic examination (DME) bio-tapes per ASTM D7658.

SENSORS: FLIR IR • ASTM SPORE TRAPS CONDITION 1 vs 3 CONFIRMATION

PROTOCOL STAGE // STATUTORY SCOPE SPECIFICATION

MOLD REMEDIATION WORK PROTOCOL

A legally binding technical blueprint authored under TDLR license MAC #1544, governing contractor remediation execution.

Pressure Containment: Mandatory continuous negative differential (≤ -0.02 in-H2O).
Air Exchange Rates: Minimum 4 air changes per hour (ACH) through HEPA filtration.
Scope Specifications: Demolition boundaries, EPA-registered chemistries, and PPE level.

LEGAL AUTHORITY: TOC § 1958.151 MANDATORY FOR PROJECTS ≥ 25 SQ FT

[SENSOR TELEMETRY COMPARATOR]

SUB-SURFACE MOISTURE MAPPING (FLIR IR)

HIGH-RESOLUTION INFRARED RADIOMETRY • 4K OPTICAL RGB vs THERMAL FALSE-COLOR

Hidden moisture behind building envelopes exhibits distinctive evaporative cooling differentials (ΔT). Interact with our calibrated sensor comparator below to inspect visual drywall versus thermal false-color ironbow radiometry and localized psychrometric dew point contours.

TACTICAL DIAGNOSTICS // FLIR THERMOGRAPHY CORRIDOR

CORRIDOR WALL ENVELOPE SEEPAGE MAPPING

SPECTRUM: VISIBLE OPTICAL (4K RGB)

FLIR thermal false-color ironbow thermogram

SPECTRUM: FLIR THERMAL IR (IRONBOW)

ZONE B // 62.4°F

RH: 94% // ACTIVE INTRUSION

ZONE C // 59.8°F

RH: 98% // SEEPAGE DETECTED

ZONE A // 73.2°F

RH: 42% // BASELINE DRY

50% IR

ACTIVE SENSOR TELEMETRY

FLIR E8-XT CALIBRATED INFRARED RADIOMETER

Click any radar hotspot on the screen to view localized psychrometric moisture telemetry, thermal differentials, and remediation criteria.

MAX DELTA ΔT -13.4°F

PEAK RH 98%

STANDARD IICRC S500

[INDEPENDENT CLEARANCE AUDIT]

POST-REMEDIATION VERIFICATION (PRV) & FORM MDR-1

CONDITION 1 RETURN CERTIFICATION • TDI FORM MDR-1 ISSUANCE • TITLE PROTECTION

Clearance cannot be certified by the remediator who performed the physical demolition. Texas law mandates that an independent Mold Assessment Consultant verify containment cleanliness and biological clearance. Passing PRV enables Envirogyn to sign and execute the official Certificate of Mold Damage Remediation.

CLEARANCE AUDIT // FIELD VERIFICATION

INDEPENDENT PRV INSPECTION

Rigorous white-glove visual audit and bioaerosol clearance verification inside negative-air containment prior to barrier removal.

Visual Verification: Zero remaining settled dust or visible fungal growth on framing.
Moisture Audit: Substrate equilibrium moisture content (EMC ≤ 15%) confirmation.
Aggressive Air Testing: ASTM D7391 bioaerosol clearance against outdoor reference baselines.

CRITERIA: ZERO VISIBLE DUST CONTAINMENT INTEGRITY VERIFIED

CLEARANCE AUDIT // STATUTORY CERTIFICATE

TDI FORM MDR-1 CERTIFICATE

The Texas Department of Insurance Certificate of Mold Damage Remediation (Form MDR-1) signed by our licensed MAC.

Legal Title Immunity: Establishes statutory rebuttable presumption of proper remediation.
Insurance Protection: Prohibits carrier underwriting surcharges or exclusions.
Closing Clearance: Eliminates buyer due-diligence friction and escrow delays.

AUTHORITY: TEXAS DEPT OF INSURANCE LEGAL TITLE PROTECTION

[HAZMAT ARCHITECTURE]

LEAD-BASED PAINT & ASBESTOS SURVEYS

DSHS LEAD FIRM #2071399 • NON-DESTRUCTIVE XRF ANALYZERS • NESHAP DEMOLITION SURVEYS

Federal and state environmental statutes mandate rigorous toxic substance profiling prior to demolition, renovation, or child-occupied property transactions. Envirogyn deploys cutting-edge spectroscopic instrumentation to delineate hazardous materials with zero destruction.

HAZMAT DIAGNOSTICS // SPECTROSCOPIC XRF

LEAD INSPECTIONS & RISK ASSESSMENTS

State-licensed Lead Risk Assessors deploy handheld X-Ray Fluorescence (XRF) spectrum analyzers for instant, non-destructive testing.

XRF Spectrum Analysis: Non-destructive lead paint quantification (HUD ≥ 1.0 mg/cm²).
Surface Dust Wipes: Floor and windowsill clearance to federal action levels.
Soil Risk Profiling: Exterior perimeter and play-area heavy metal screening.

INSTRUMENT: NITON / VIKEN XRF HUD GUIDELINES COMPLIANT

HAZMAT DIAGNOSTICS // NESHAP COMPLIANCE

ASBESTOS DEMOLITION SURVEYS

Mandatory pre-renovation and pre-demolition hazardous building inspections satisfying EPA, OSHA, and NESHAP mandates.

Systematic Sampling: Thermal insulation, acoustical surfacing, tiles, and mastics.
Microscopic Analysis: Polarized Light (PLM) and Transmission Electron Microscopy (TEM).
Permit Documentation: Comprehensive hazardous material reports for city permits.

STANDARD: EPA / OSHA / NESHAP COMMERCIAL DEMO PERMIT CLEARANCE

ENVIRONMENTAL CONSULTING