Assessment Program Design
Designing the assessment program — what type of samples to collect and where to sample — for a defensible vapor intrusion investigation.
VAPOR INTRUSION · SOIL GAS · SUBSURFACE RISK
Defensible answers to the hardest questions in vapor intrusion.
Hartman Environmental Geoscience specializes in vapor intrusion and soil gas assessment. Led by Dr. Blayne Hartman — a nationally recognized expert with over 30 years of soil gas experience — we combine rigorous field measurement, on-site analysis, and regulatory fluency to resolve subsurface exposure pathways with scientific defensibility, so consultants, counsel, developers, and agencies can make decisions that hold up under scrutiny.
- Ph.D.
- Geochemistry, USC (1983)
- 30+ yrs
- Soil gas experience
- 18+ yrs
- Vapor intrusion
- 25+
- State guidance documents
Vapor intrusion support, end to end
HEG provides specialist vapor intrusion support services, typically working alongside the local consultant to deliver the expertise a site requires — from assessment design through regulatory closure.
Site-Specific Screening Levels
Determination of site-specific screening levels appropriate to the exposure pathway and regulatory framework.
Field Sampling & Supervision
Indoor air and soil gas field sampling, and/or supervision of sampling performed by the local consultant.
Continuous TCE / VOC Monitoring
Continuous monitoring of indoor air for TCE and other VOCs, including real-time data collection during remediation.
On-Site Analysis
On-site analysis of indoor air and soil gas samples by methods 8021, 8260, TO-14, TO-15, and TO-17.
Data Review & Interpretation
Review and interpretation of soil gas and indoor air data, including risk calculations using Johnson-Ettinger (J-E) models.
Workplans & Reports
Preparation of workplans and interpretive reports — and review of workplans and reports prepared by others.
Regulatory Interaction
Interaction with regulatory agencies to move sites toward resolution and closure.
Expert Witness & Litigation
Mitigation system design and installation, plus expert witness and litigation support.
Selected case studies
Field-proven work across federal, state, and private sites — continuous TCE/PCE monitoring, large residential plume assessments, and EPA research collaborations.
Continuous Monitoring
Thermal heating remediation — Oakland, CA
Continuous monitoring of indoor and ambient air for vinyl chloride, TCE, and PCE at 14 locations during thermal remediation — approximately 25,000 measurements.
- Client
- OTIE
- Agency
- EPA Region 9
Residential Plume
Residential neighborhood — Phoenix, AZ
Vapor intrusion assessment of over 100 residential units located over a TCE groundwater plume.
- Client
- Motorola / Freescale
- Agency
- EPA Region 9
EPA Research
EPA-ORD Research House — Indianapolis, IN
Real-time, continuous (24-hour) monitoring over seven months as part of an EPA Office of Research and Development study.
- Client
- Dr. B. Schumacher
- Agency
- EPA-ORD
Continuous Monitoring
Industrial facility — Baltimore, MD
Basement air monitoring at 15 locations for TCE and PCE — approximately 8,000 measurements collected over a two-month period.
- Client
- Tetratech / CDM Smith
- Agency
- —
VI Assessment
Clocktowers Site — Lancaster, PA
TCE vapor intrusion assessment at a former manufacturing facility with neighboring school and residential units.
- Client
- General Dynamics OTS
- Agency
- PA-DEP / EPA R3
Residential Plume
Residential neighborhood — Seal Beach, CA
Vapor intrusion assessment of approximately 50 houses neighboring an operating service station.
- Client
- Arco
- Agency
- CA-EPA
Continuous Monitoring
Thermal heating remediation — New Hampshire
Continuous monitoring at 15 locations during thermal remediation — approximately 30,000 measurements of TCE and PCE.
- Client
- Hull & Associates
- Agency
- EPA Region 1 / NH-DEH
Continuous Monitoring
Single-family residence — Los Angeles, CA
Continuous monitoring of indoor and ambient air for TCE at 8 locations over 30 days to determine contamination sources.
- Client
- Ramboll
- Agency
- CA-DTSC
VI Assessment
Commercial building & neighborhood — Indianapolis, IN
PCE vapor intrusion assessment involving soil gas sampling, indoor air analysis, and monitoring programs.
- Client
- EcoInnovators
- Agency
- Indiana DEM
Residential Plume
Residential neighborhoods — Phoenix, AZ
Assessment of over 100 residential units located over a PCE groundwater plume.
- Client
- Arizona DEQ
- Agency
- Arizona DEQ
VI Assessment
Residential neighborhood — Miles City, MT
Vapor intrusion assessment of rail-yard-neighboring houses over diesel contamination.
- Client
- Trinity Railcar Inc.
- Agency
- Montana DEQ
VI Assessment
Rural townships — Hanover, KS
Vapor intrusion screening of approximately 20 rural townships and detailed assessment of ~20 residences for carbon tetrachloride.
- Client
- USDA & Argonne National Laboratory
- Agency
- Kansas DHE
VI Assessment
Marcellus Shale methane investigations — rural PA
Developed SOPs and provided training on soil gas methane investigations for source identification.
- Client
- Chesapeake Energy & Groundwater Environmental Services
- Agency
- PA
Training & seminars by Dr. Hartman
Dr. Hartman has been giving field sampling and vapor intrusion training since the early 1990s, noted for a practical, clear, and enthusiastic speaking style — you won't be bored, we assure you. He has trained regulators and consultants across 30+ states, EPA regions, the DOD, and EPRI, and internationally in Brazil, Australia, and England.
- Trained regulators and consultants across 30+ states and EPA regions
- Instructor for EPA-OUST, ITRC, API, and ASTM vapor intrusion courses
- International training delivered in Brazil, Australia, and England
- Both 1-day and 2-day course formats available
Course formats
1-day & 2-day courses
Covering the vapor intrusion pathway, soil gas and indoor air sampling methods, data interpretation, and regulatory frameworks. Delivered on-site or as agency and stakeholder seminars.
Inquire about training
A respected figure in the vapor intrusion community
Dr. Blayne Hartman
A nationally recognized expert on soil vapor sampling, soil vapor analysis, and vapor intrusion, Dr. Hartman holds a Ph.D. in geochemistry from the University of Southern California (1983). He has performed soil gas sampling and on-site laboratory analysis since the mid-1980s and vapor intrusion assessments since the mid-1990s — over 30 years of soil gas and 18 years of vapor intrusion work.
He founded TEG in 1988 and co-founded H&P Mobile GeoChemistry in 1998, pioneering on-site laboratory analysis, direct-push environmental sampling, and soil vapor surveys. He has served as an instructor for EPA-OUST, ITRC, API, and ASTM vapor intrusion courses, contributed author and editor to vapor intrusion and soil gas guidance documents (federal EPA, CA-EPA, San Diego County, ITRC, DOD, API, and 25+ state documents), and led six EPA-ORD research studies between 2007 and 2012. His vast connections throughout the vapor intrusion community let him call in additional expertise as needed for any given project.
Get in touch with a vapor intrusion and soil gas specialist
Tell us about your site and the questions you need answered. We typically work with the local consultant to provide the expertise required to assess the vapor intrusion pathway.
Hartman Environmental Geoscience
717 Seabright Lane, Solana Beach, CA 92075-1270