System Operator, PRC Environmental Management, Inc., 1505 PRC Drive, TM220, McLean, VA 22102

F -- INVITATION FOR SUBMITTAL TO THE VENDOR FIELD ANALYTICAL AND CHARACTERIZATION TECHNOLOGIES SYSTEM (VENDOR FACTS) VERSION 1.0 The U.S. Environmental Protection Agency (EPA) is announcing an invitation to vendors of innovative monitoring and measurement of technologies for hazardous waste site characterization to participate in the Vendor FACTS database. Vendor FACTS is being developed by EPA's National Exposure Research Laboratory - Las Vegas of the Office of Research and Development and the Technology Innovation Office of the Office of Solid Waste and Emergency Response. The purpose of Vendor FACTS is to disseminate much needed information on innovative techniques for site characterization, and to promote the use of more cost-effective methods for on-site monitoring and measurement. The system contains information provided by vendors of technologies that meet the eligibility criteria for inclusion in the database. These criteria are listed below. Vendors will submit information about their technologies on a Vendor Information Form (VIF). Information contained in the database will enable users to screen technologies for consideration in the site remediation process and to identify vendors who provide monitoring and measurement services. Most Vendor FACTS users are expected to be professionals responsible for the assessment or cleanup of Superfund sites, RCRA corrective action sites, state-lead clean-ups, federal facilities, and leaking underground storage tank (UST) sites. To make Vendor FACTS accessible to all system users, EPA will provide the software free of charge. Technologies meeting the following criteria will be included in Vendor FACTS: 1) fieldable technologies: portable or transportable equipment for on-site monitoring, screening, and analysis of hazardous substances (equipment used for collecting samples for off-site analysis will not be considered); and 2) technologies to monitor and characterize contaminated sites, not industrial process waste streams; and 3) technologies that fall in one of the following categories: Air Measurement (NAAQS) - This portable or transportable technology includes all means to determine whether air meets the National Ambient Air Quality Standards issued under the Clean Air Act and similar laws and regulations. Target analytes include carbon monoxide, nitrogen oxides, sulfur oxides, hydrocarbons, ozone, photochemical oxidants, and particulate matter. Some versions of the technology are designed for point readings, in time, space, or both, while others are intended to assess over a period of time (hours, days, weeks; as averages or as maxima) or an extent of space (a metropolitan area or neighborhood). Analytical Detector - The analytical detector is the component of any analytical instrument which senses the analyte (target) and produces a signal, usally electrical. The rest of the instrument consists of (1) a translator which coverts the signal from thd detector into usable form, (2) the output for the translated signal (meter, digital display, strip chart) and (3) the power supply, controls, case, and other components which support the sensor, translator, and output. Analytical Traps - This technology consists of means to concentrate a desired target chemical as the sample is being collected. At present, a few variations are in use, such as the charcoal, resins, and bubblers used in collecting air samples. In addition, similar techniques are used in the laboratory for the preparation of analytical samples, including ion-selective (ion-exchange) devices and molecular sieves (working on molecular size). For analytical trap technologies that have been in existence for more than 10 year, the vendor must provide an explanation of why the technology is innovative. Biosensors - (1) This portable technology includes devices which use derivatives of living organisms (such as enzymes, tissues, microbes, or antibodies) as a biological sensing element. The biological sensing agent is in intimate contact with a physical transducer (such as electrochemical, acoustic, or optical) which together relate the connections of an analyte to a measurable electrical signal. They re commonly used in the clincial chemistry laboratory, especially in the form of electrodes sensitive to a target enzyme or chemical. Chemical Reaction-Based Indicators - This portable technology includes chemicals which covnert an inapparent change in the chemical state of the target system to a visible color change or other easily noted indicatin. Many methods look at a chemical species othert than the hydrogen atom, such as ferric/ferrous, chromic/chromate, and oxidizing/reducing species. Some versions of the technology give a graded response, rather than a dichotomous reponse, similar to wide-range pH paper. Cone Penetrometer - A technology which uses a cylindrical, cone-tipped instrument, forced into the ground by hydraulic pressure. Built-in load cells measure the forces impinging on the conical tip and along the cylindrical section (friction) just behind the tip. In most instruments, these data are translated into soil classifications so one obtains instantaneous information on the stratigraphy of the soil. The technology has been used in Europe for decades and is becoming popular ``in the U.S.'' The innovations, some being tested by the SITE Program, include additional sensors added to the instrument to detect pollutants in the subsurface. Cone penetrometers themselves are not considered innovative for the purpose of Vendor FACTS. Downhole Sensors - Saturated Zone - Thee portable or transportable sensors can be used to determine subsurface chemical or physical properties. These sensors must be capable of operation in the saturated zone, in either a dynamic or static mode. The dynamic mode would produce data in real time as the sensor was advanced through the subsurface. The static mode would involve a sensor that either could not provide data as it was advanced, or was not capable of being advanced through the saturated zone. The static mode could be ued in a borehole with a maximum diameter of six inches or less. Downhole sensors that can be used in a borehole with a diameter of two inches or less are preferred for the Vendor FACTS database. The vendor FACTS database will not include common geophysical, gamma, spontaneous potential, gamma-gamma, caliper, and neurtron logging tools. Vendor FACTS also will not include TV cameras that can be inserted down a borehole. Downhole Sensors - Vadose Zone - These portable or transportable sensors can be used to determine subsurface chemical or physical properties. These sensors must be capable of opertion in the vadose zone, in either a dynamic or static mode. The dynamic mode would produce data in real time as the sensor was advanced through the subsurface. The static mode would involve a sensor that either could not provide data as it was advanced, or was not capable of being advanced through the vadose zone. The static mode could be used in a borehole with a maximum diameter of six inches or less. Downhole sensors that can be used in a borehole with a diameter of two inches or less are preferred for the Vendor FACTS database. The Vendor FACTS database will not include common geophysical, gamma, spontaneous potential, gamma-gamma, caliper, and neutron logging tools. Vendor FACTS also will not include TV cameras that can be inserted down a borehole. Fiber Optic Chemical Sensors and Analyzers - These field portable sensors employ fiber optics to transmit excitation energy to either a reaction chamber or directly onto a sample matrix. Fiber optics also are used to return the signal produced from either a fiber coating, a reaction chamber, or a sample matrix, directly into some type of detector. Generally colorometric or spectroscopic deterctors are used in this process. These sensors produce real time in situ data. Ground Pentrating Radar - This technology, in use for some years now, consists of emitting pulses of electromagnetic energy into the ground, and measuring its reflection/refraction by subsurface layers and other features (such as buried debris). It is analogous to seismic techniques, but with a pulse of electromagnetic energy, rather than sound (physical) energy. High Frequency Electromagnetic (EM) Sounding - These technologies, used for non-intrusive geophysical exploration, project high frequency electromagnetic radiation into subsurface and detect the reflection/refraction of the radiation by varying soil layers. Unlike ground penetrating radar, it uses continuous waves, as opposed to pulses. High Resolution Seismic Reflection - The classic technique of seismic reflection/refraction has been used for decades, primarily for examining relatively large features, such as the salt domes (often containing petroleum) of the Gulf Coast. This technology includes means to refine it to determine smaller scale features, such as debris or the lenses, buried channels, and other features found in till deposits. This technology must be able to measure features of interest within 100 feet of the ground surface to be considered innovative. Immunoassay - These field portable test kits use immunochemistry to produce compound specific reactions (generally colormetric) to individual compounds, or classes of compounds. These reactions are used to detect and quanitify contaminants. The immunochemical reactions center around polcylonal antibodies. These antibodies are engineered to produce compound specific reactions. The methods used to bring the antibodies into contact with a water sample or soil sample extract are variable. Infrared (Long Path) Monitors - Classic infrared techniques involve a path of one centimeter or less in a solid or liquid. This technology looks at gases in longer path lengths, from a few centimeters to hundreds of meters. In some cases, the path may be inside the instrument. Alternatively, the air being sampled is ambient, not confined to the instrument. The air being sampled may represent a point source, such as a stack being monitored, or it may be an area. The newest variant involves remote reading of a source; this may involve checking the exhaust of a car driving on the road or th reflection from an appoaching cloud. Mass Spectrometry (portable only) - This field portable technology involves modifying a large, laboratory instrument so it can be taken into the field. Mass spectrometry breaks molecules into fragments and determines the concentrations and mass/charge ratios of the fragments. Each molecule generates a distinct pattern of fragments, so a sufficiently sensitive system can provide absolute identification of a contaminant. Less sensitive systems can readily determine class characteristics of molecules by identifying relevant radicals and other less than molecule size groups. Mass spectrometry units that are considered innovative are portable, weather-proof units that have self-contained power supplies. Nuclear Magnetic Resonance - This field portable and transporatable technology involves modifying a large, laboratory instrument so it can be taken into the field. Nuclear magnetic resonance measures the electronic environment (that is, adjacent and nearby chemical bonds) of the nuclei of a particular species of atom. The most common laboratory and and clinical use is on protons, but it can be used for any atom with an odd number of protons (such as the alkai metals, alumimum, and phosphorus) or an odd number of neutrons (such as carbon-13, magnesium-25, silicon-29, and chromium-53, all significant fractions of the naturally occuring elements). Thus, it can determine the chemical composition, or variation in chemical composition, or variation in chemical composition, throughout the mass of a sample. Soil Gas Analyazer Systems - These portable systems provide on site or remote montitoring of woil gas constituents. Their main components are a soil gas sampling system, soil gas analyzer, and data storage or transmission station. All of these components are microprocessor controlled and can be programmed to provide routine periodic sampling and monitoring, or on demand sampling and moinitoring. These systems also use some type of standard to provide periodic checks of accuracey and precision. Supercritial Fluid Extraction - These portable and transportable, self contained units use supercritical fluids such as carbon dioxide to extract chemical constituents from enviromental matrics. Thermal Desorption Devices - These portable and transportable, self contained units use high temperatures to volatilze and extract volatile and semivolatile chemical constituents from environmental matrices. Transientr Electromagnietic (EM) Geophyics - Theses technologies are based on detecting changes in subsurface electromagnetic characteristics. Interpretation of this data provides information on the subsurface environment. This particular technology differs from ground penetrating radar in that it looks more at the shape of the pulse at the sensor, rather than at the pulse's time of arrival. Voltammetric Stripping - These portable units use electrochemistry to detect and quantify metals in environmental samples. By changing the potential across an anode or cathode, these instruments cause metals in solution to plate-out or be released. By changing the anode and cathode material, specific metals can be targeted for detection and quanitation. This technology is generally applied to water samples, however, it may be possible to use this technology on extracts from soil samples. X-Ray Fluorescence Analyzers - These self-contained, field portable instruments consist of an energy dispersive x-ray source, a detector, and a data processing system. The combination of a source and data processing system allow for the detection and quantitation of individual metals or groups of metals. Prior to accepting a technology application for Vendor FACTS, EPA will review each technology for applicability and completeness. Vendors of innovative monitoring and measurement technologies who wish to participate in Vendor FACTS version 1.0 must complete a VIF (EPA-542-R-94-007), which can be obtained by faxing requests to U.S. EPA/National Center for Environmental Publications and Information (NCEPI) at (513) 489-8695. Send completed forms to: Vendor FACTS System Operator, PRC Environmental Mangement, Inc., 1505 PRC Drive, TM220, McLean, VA 22101. Vendor FACTS support is provided by PRC Environmental Management, Inc., for EPA's EMSL-LV and TIO under Contract No. 68-CO-0047. Information submitted by April 30, 1995, will be considered for inclusion in the first Vendor FACTS release in the third quarter of 1995. The database will be updated annually. To order the Vendor FACTS database when it becomes available, fax your name, address, phone number, and diskette size preference (5 1/4'' or 3 1/2'') to (513)489-8695, and for verification, (513)891-6561. For more information, call the Vendor FACTS Hotline 800-245-4505 or 703-883-8448. The information contained in this Invitation for Submittal is approved by the Office of Management and Budget under the Paper Work Reduction Act (OMB#2050-0114) (044)

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