Guaranteeing Fuel Release Mitigation Project Outcomes with the Aid of High Resolution

Data Sets

Roger LambConsulting Environmental Hydrogeologist

615 406 0759

rogerlambconsulting@gmail.com

Collected over 15 years

Collected over 5 days

Total 2,876

Total 16,262

Collected over 15 years

Collected over 5 days

Total 2,255

Total 13,545

Gasoline Release Defined by the MIP FID Sensor

LNAPL and Dissolved Phase Plume

Gasoline LNAPL Defined by the uVOST/LIF

LNAPL Body

Groundwater Surface

UST Pit

Alluvial Clays

Alluvial Sands

Hydrogeology and Excavated Areas Defined by HPT

1. Establish Desired Results with Stakeholders.

2. Develop Initial LNAPL Conceptual Site Model (LCSM).

3. Ground-Truth Results than can actually be achieved based on the Initial LCSM.

4. Design Field Investigation based on Initial LCSM.

5. Implement Investigation and Update LCSM and Achievable Results in Real-Time.

6. Confer with Project Stakeholders in Real-time.

7. Crunch Investigation Data.

8. Pilot Test Remediation Programs with High Resolution Tools (if applicable).

A Path Toward Guaranteeing Fuel Release Mitigation Project Outcomes

Develop Initial LCSM From Existing Site Data

• Fuel Types and Age of Releases – Weathered Gasoline/Leaded Gasoline.

• Source Areas Locations and Utilities.

• Hydrogeologic Data – Saprolite/Alluvium/Cherty Clays.

• Map Mobile LNAPL – LNAPL That Accumulates in Wells.

• Map Soil and Groundwater Analytical Results – Above 1 mg/L or mg/kg Benzene or Naphthalene indicative of LNAPL.

• Map Locations of Possible Receptors/Pathways.

• Map Locations of Potential Offsite Chemical Release Sources.

Critical to fold into the LCSM is current understandings of:

1. Residual/Mobile/Migrating LNAPL

2. LNAPL Transmissivity

3. LNAPL Biodegradation

4. Vapor Intrusion – Benzene

5. Environmental/Remediation Hydrogeology

Field Investigation Design

Start with Anchor Points - Advance Direct Sensing Tools next to 3 to 6 sample locations that having the one of the following characteristics:1. Has Contained LNAPL.2. Groundwater Results over 1 mg/L Benzene or

Naphthalene.3. Soil Results over 1 mg/kg Benzene or Naphthalene.4. Is of Interest Based on Potential Receptors or Other

Factors.5. Naphthalene concentrations at ppm concentrations in

soil or groundwater samples is a positive indication that the uVOST/LIF or new OIP tool will detect the LNAPL.

Goal – Determine if Initial LCSM is accurate and if uVOST/LIF will detect the LNAPL or is the MiHPT needed.

If there are no analytical results for the Site, advance uVOST/LIF or MiHPT soundings next to suspected source areas to start with then move to property boundary or potential receptor pathways.

Critical Field Design Considerations

1. Geologic Condition Issues- Cherty Soils or Shallow Bedrock.

2. Concrete Pavement – Have Coring Tools Onsite.

3. Weathered Gasoline – Both uVost/LIF or MiHPT tools.

4. Leaded Gasoline – An MiHPT with and ECD Detector.

5. Inside Building or Tight Locations – Determine if accessible by contractors equipment.

6. Offsite Access - Plan for it based on initial LCSM.

7. Potential Impact of Offsite Chemical Releases.

Implement Field Investigation

1. As high resolution data is collected, update the LCSM in real-time with focus on the project goals and determining what result(s) can be guaranteed.

2. Quickly determine if the uVOST/LIF is detecting the LNAPL.3. Ensure all project stakeholders are updated to changes in the

LCSM in real-time if possible and daily at a minimum.4. The whole technical project team must be updated in real-

time.5. Look for indicates of chlorinated solvents in the MIP sensor

data either the ECD or XSD.6. Fold into the real-time analysis modern LNAPL science and

hydrogeology.

A very useful web-based real-time mapping and data sharing tool is:

https://www.smartdata-solutions.com

Screen Shot of Smart-Data Solutions Website

Crunch Data Set Focused on Project Goals

Pilot Test Remediation Programs

Thank You