Frequently Asked Questions
Remediation Applications
- How are Free Flow products packaged and delivered?
- Free Flow products are deliverable in bulk bags, dump trucks or pneumatic tankers.
- Do Free Flow products require specialized mixing equipment?
- No.
- Is Personal Protective Equipment (PPE) required when handling Free Flow products?
- This is dependant on how the product is being used for treatment. We recommend regular leather work gloves and an N100 dust mask when working directly with the product.
- Are Free Flow products distributed nationwide?
- Our products are available to ship anywhere in the world.
- Can these products be used in a wet or dry environment?
- Free Flow products can be used in both wet and dry environments.
Inline Treatment Applications
- What is the density of FF-100®?
- Density is blend specific. Please refer to our specification sheets under "Documentation" for additional information about each blend.
- Do you have to add water to FF-100®?
- No.
- How does the chemistry work?
- Please go to our "Products" page for more information on Free Flow product chemistry.
- How long must we wait prior to analyzing a treated sample?
- No waiting is necessary. Once the product has been mixed in, a samplemay be collected for laboratory analysis.
- How much do we need to add for treatment?
- The amount of product required for treatment depends on the types and levels of contaminants in the material to be treated.
- What metals does FF-100® work on?
- All of the RCRA metals: arsenic, barium, cadmium, chromium, lead, mercury, selenium and silver.
- Does FF-100® reduce acid gas emission?
- Yes.
Organics Remediation Applications
- Under what circumstances would the ART technology not be applicable?
- The ART technology has to be evaluated on a case by case basis. However, by rule of thumb, the ART Technology is not designed for site with a permeability of 10-5 cm/sec or less.
- For sites with permeability of less than 10-5 cm/sec, the LowPerma Technology may be used. In addition, a depth to water of a minimum of 5 feet is needed to allow enough vertical drop for the stripping column. This can be achieved by using stickup wells in areas that the groundwater table is less than five feet below grade.
- What information is needed in order to determine the applicability of the ART Technology at a site?
- See Site Assessment Form. Basic information needed includes:
- - Contaminants of concern
- - Lateral/vertical extent of contaminants of concern
- - Cross sections and boring logs
- - Geologic and hydrogeologic information
- - Well information logs
- What are the typical Operation and Maintenance costs for using the ART Technology?
- Incremental O&M costs should not exceed what you would expect with a typical air sparging/vapor extraction system. It is anticipated that shortened project life will result in reduced overall O&M costs. Past experiences with the ART Technology have identified total O&M costs to be half of typical AS/SVE O&M costs over the project life.
- How do you measure the radius of influence?
- The radius of influence is measured, at minimum, by monitoring changes in the following parameters, relative to conditions at start-up time in nearby monitoring wells.
- - Change in contaminant concentration.
- - Change in Dissolved Oxygen (DO)
- - Vacuum influences
- Some clients have installed piezometers, pressure or temperature sensors. You are encouraged to install any technique you feel would assist you to confirm the radius of influence.
- How will free product (LNAPL, DNAPL) affect the ART system?
- At many sites, LNAPL is present as coalesced droplets, squirts, ect. Minor influxes of LNAPL into the well will be "chewed up" as we actively sparge, circulate, and vent within the well. In the event that significant levels or slugs of LNAPL are encountered, the ART well can be configured as a total fluid recovery well to pump product to the surface. This is another benefit to the field flexibility of the ART Technology. The ART Technology is designed to remove DNAPL via volatilization.
- What metals does FF-100® work on?
- All of the RCRA metals: arsenic, barium, cadmium, chromium, lead, mercury, selenium and silver.
- What are the standard system requirements?
- Please note: The following are conceptual guidelines for requirements at a site. Final determination of these parameters is made based on actual field parameters as part of the startup process.
- 1. Compressed air flow to wellhead: approximately 10 scfm at pressure exceeding the water column in the well and friction loss in the sparging hose and head. The compressor should have additional capacity of 5 to 10 scfm to increase sparging rate if needed.
- 2. Vacuum flow from wellhead: a function of the formation permeability, vadose zone contamination extent, and other parameters. Vacuum is usually approximately 3 times the sparging rate.
- 3. Power requirements for the pump: 110 Volt or 220 Volt depending on the type of pump chosen.
