Since 1998 Fruits and Associates, Inc. has concentrated on buildingand implementing a viable mobile remediation platform and we havetermed High-Vacuum Remediation for completing episodic MEMEevents. The idea behind High-Vacuum Remediation for completingepisodic MEME events was two fold:

1. To provide high impact remediation at sites without the capital expenditure of a fixed based system.

2. To put the system on a platform that allows for a wide variety of operation options and data collection capabilities under a wide range of subsurface conditions.

Some of the major benefits to MEME is it’s mobility, it’s capacity to provide a turn-key service, and it’s ability to enhance and increase the effectiveness of a variety of

remediation applications.

During the extraction process,the combined air and liquidsare transferred to the HVRmobile treatment system. Theliquids are separated from theairflow with a liquid scrubber/knock-out system anddischarged into an internalstorage tank for later disposal.

The hydrocarbon vapors aretransferred to the off-gastreatment system and areincinerated in our forced airTHOX unit. After thoroughdestruction of the contaminantsin the air stream, the clean airis discharged into theatmosphere.

A drop tube assemblycommonly know as a stingeris used to facilitate theextraction of vapors,groundwater and free phaseproduct from on-sitemonitoring well and/orrecovery wells.

The stinger assembly andpiping configuration shouldallow for data to be collectedat each individual well headin addition to the overall sitedata collected at the HVRunit.

How to Plan & Perform an Effective MEME Event

• Development of a Scope of Work – Determining duration & setting goals.

• On-site Event Implementation – Maintaining lines of communication. Are we maximizing our effectiveness?

• Post Event Reporting– What did we see?

Development of a Scope of Work

What are my goals? • Is this for straight LNAPL recovery?• Is this for the collection of pilot testing data for a system design?• Is this for dissolved phase recovery/dewatering

What are the current site conditions?• How much LNAPL is present in how many wells?• What is the historic high/low groundwater table?• What are the general site conditions?

What happen during the last event?• What was the length of the event?• How much GW was removed?• How much LNAPL remained?

How long should the event be?

Event DurationThere has been a lot of discussion of late regarding the need for longer term MEME events. A couple of things should be considered when determining the length of events:

• Current site conditions (GW Levels)

• Is LNAPL Present & in How Many Wells

• Level of VOC concentrations

• Number of Wells to be Connected

• Pilot Test Data

• Position of Stinger Tube

• Vacuum/Air Flow

• TOV readings (adjusted for methane)

• Radius of Influence Readings (Vacuum & DTP/DTW)

• GW Recovery Rate

On-site Event Implementation

For most sites, the first 2 to 4 hours of the event should bemonitored closely by not only the on-site technician but also theconsultant. This is time period when maintaining an open line ofcommunication becomes most important. Items that you should payclose attention:

Data ReportingInvaluable to Remediation System manufacturers. At a minimum the report should discuss the following:

• A table detailing the timeline of the event.

• The applied vacuum, wellhead vacuum and wellhead air flow rates.

• VOC recovery rates and calculated equivalent gallons recovered.

• Total groundwater recovery volumes.

• Radius of Influence Data

• Off-Gas Treatment Data

Event Duration/Cost of Recovery8-Hour Event in Norcross, GA – New release. One well with 1.85 ft. of LNAPL. Extracted from LNAPL well and two recovery wells.

287.9 equiv. gallons of hydrocarbons removed1,700 gallons of PCW~$13.00 per equiv. gallon

24-Hour Event in Atlanta, GA (Event #3) –Scope was three events each month for 90 days. Three LNAPL wells ranging from 0.12 ft. to 1.05 ft. in thickness. 1st event had five LNAPL wells ranging from 0.35 ft. to 1.41 ft. Rotated extraction between 8 on-site wells.

195 equiv. gallons of hydrocarbons removed (Total 689)5,993 gallons of PCW (Total 15,444)~$39.00 per equiv. gallon (Total ~$32.00)

Event Duration/Cost of Recovery48-Hour Event in Knoxville, AL (Event #13) – Eleven LNAPL wells ranging from 0.11 ft. to 1.17 ft. in thickness. Rotated extraction between 8 on-site wells.

554 equiv. gallons of hydrocarbons removed (Total 3,691)11,550 gallons of PCW (Total 115,795)~$20.00 per equiv. gallon (Total ~$23.00)

96-Hour Event in Decatur, GA (Event #3) – Three LNAPL wells ranging from 0.28 ft. to 1.28 ft. in thickness. Historical LNAPL has been over 2 ft. at times. Extracted from 4 on-site wells.

675 equiv. gallons of hydrocarbons removed (Total 1079.05)4,700 gallons of PCW (Total 22,333)~$27.00 per equiv. gallon (Total ~$30.00)

Pilot Testing

MEME is the perfect tool to assist in the development of a remediationstrategy and remediation system design. Data can be collected acrossthe spectrum of airflow, vacuum, GW recovery rates, TOVconcentrations, & ROI. Examples of this are:

• Stinger depth vs. TOVreadings

• Stinger depth vs. Air flow• Stinger depth vs. Historic

DTW• Vacuum vs. Airflow• Vacuum vs. ROI• Vacuum vs. GW Recovery

Rates• Well vs. Well

Consultants and clients are seeing the added value in evaluating andimplementing in-situ remediation alternatives at project sites. However,the key to in-situ remediation has and will always will be Contact, Contact,Contact! To that end, combining HVR with in-situ remediation techniquescan provide the following benefits at relatively low cost:

• Increase in radius of influence and the creation of a “pulling effect” (ChemOx)

• The creation of a cone of depression to allow better smear zone contact. (ChemOx & Surfactant)

• The creation of a capture zone and a means for mobile high vacuum extraction. (Surfactant)

Surfactant & In-Situ Remediation

MEME w/ Episodic Air SpargingCombination of MEME and episodic air sparging has brought along a newapproach to providing site clean-up and/or site polishing while avoidinghaving to operate a fixed base system. This combination of mobiletechnologies can provide a means to address:

• On and off-site dissolved phase VOC concentrations.

• Remediation of outlining non-capture zones.

• Remediation of small and/or nuisance source areas.

Case Study – MEME w/ Air SpargingSITE: Gas Station located in Coastal Alabama

Gasoline release discovered in 2002 in the UST area. No FP present. Dissolved BTEX concentrations exist in wells MW-6, MW-15, & MW-17 above action levels. Surface water body exists adjacent to the site.

Case Study #1 – MEME w/ Air SpargingSITE: Coastal Alabama10 MEME events perform over the years. Recovery during each event remained fairly consistent. FRUITS performed three 8 hour events with air sparging, one in October 2014, February 2015, & June 2015

Case Study – MEME w/ Air Sparging

SITE: Bulk Storage Facility in Mississippi

Historic Bulk Storage Site. Pump & Treat system operated for over 10 year. FP present intermittently in 2 to 3 wells. Dissolved BTEX concentrations exist in wells numerous wells above action levels. Started perform week long AVFR events in August 2013. Added Air Sparge to the events in January 2014.

Case Study – MEME w/ Air Sparging

SITE: Bulk Storage Facility in Mississippi

First 96-hour event did not utilize Air Sparge (Average 37.26 lbs of Hydrocarbons)

All Subsequent events (24-hour & 96-hour) utilized Air Sparge. (Average : 243.55 lbs of hydrocarbon)

Thanks!!!!