Due Diligence
Phase I ESA environmental site assessment ASTM E1527 due diligence Los Angeles Orange County Southern California All Pro Environmental
Phase I Environmental Site Assessment
ASTM E1527-21 compliant Phase I ESAs identifying Recognized Environmental Conditions (RECs) to support lender financing, acquisitions, and regulatory compliance across Southern California.
Site Characterization
Phase II ESA soil sampling site characterization groundwater sampling VOCs Southern California All Pro Environmental
Phase II ESA & Site Characterization
Comprehensive soil, soil vapor, and groundwater investigations to characterize VOCs, petroleum hydrocarbons, chlorinated solvents, metals, and other contaminants of concern.
DTSC
DTSC California Department of Toxic Substances Control regulatory compliance oversight remediation Southern California
DTSC Regulatory Compliance
Expert interfacing with the California Department of Toxic Substances Control. We prepare Voluntary Cleanup Agreements, Removal Action Workplans, and Remedial Action Plans to achieve closure.
LARWQCB
LARWQCB Los Angeles Regional Water Quality Control Board compliance NFA letter petroleum sites Southern California
LARWQCB Case Management
Strategic navigation of the Los Angeles Regional Water Quality Control Board. We manage open cases, prepare workplans and monitoring reports, and negotiate No Further Action letters.
Brownfields
Brownfields assessment redevelopment Los Angeles Orange County Riverside San Diego Southern California
Brownfields Assessment & Redevelopment
Full-service brownfields support for developers, municipalities, and housing agencies — from initial assessment through remediation and regulatory closure for successful redevelopment.
Dry Cleaner
Dry cleaner remediation PCE TCE chlorinated solvents Los Angeles Orange County Southern California
Dry Cleaner Remediation
Specialized remediation of PCE, TCE, and chlorinated solvent-impacted sites from former and active dry cleaning facilities, under DTSC and RWQCB oversight across Southern California.
SVE Systems
Soil vapor extraction SVE system design operation VOC remediation Southern California
Soil Vapor Extraction (SVE)
Design, installation oversight, and operation of SVE systems for VOC-impacted soil remediation — optimizing well placement, blower selection, and treatment to achieve cleanup goals efficiently.
Vapor Intrusion
Vapor intrusion assessment risk evaluation OEHHA Southern California Los Angeles Orange County San Diego
Vapor Intrusion Assessment
Comprehensive VI assessments including soil vapor, sub-slab vapor, and indoor air sampling. Human health risk assessments per OEHHA guidance and DTSC/RWQCB requirements.
SSD Systems
Sub-slab depressurization system SSD design installation vapor mitigation Southern California
Sub-Slab Depressurization
Custom SSD system design and installation to prevent vapor intrusion into occupied buildings — with post-mitigation sampling and regulatory verification throughout Southern California.
Groundwater
Groundwater sampling monitoring well network Los Angeles San Diego Riverside Southern California PFAS 1,4-dioxane
Groundwater Sampling & Monitoring
Monitoring well network design and management for long-term contaminant tracking. Low-flow sampling and lab analysis for VOCs, SVOCs, metals, TPH, PFAS, and 1,4-dioxane.
Air Quality
Indoor air quality IAQ air sampling TO-15 Summa canister Los Angeles Orange County San Diego Southern California
Air Sampling & Indoor Air Quality
IAQ investigations using Summa canister (TO-15) and sorbent tube methods. We evaluate occupant exposure to VOCs, PCE, TCE, and benzene in residential, commercial, and industrial settings.
UST / Petroleum
UST removal underground storage tank petroleum hydrocarbon remediation TPH Southern California
UST Removal & Petroleum Remediation
UST removals, closures, and petroleum hydrocarbon remediation for gasoline stations and industrial sites — coordinating with fire departments and RWQCB for cost-effective closure.
Methane / Soil Gas
methane testing soil gas survey vapor encroachment Los Angeles building permit LADBS Southern California
Methane Testing & Soil Gas Surveys
Methane screening, soil gas surveys, and vapor encroachment assessments for building permits, property transactions, and regulatory compliance throughout Southern California.
