All downhole assemblies are manufactured using a priority formula comprised of an HP Anhydride Epoxy and a High Silica Filament Glass.

The continuous filament gives the product an extremely high strength / weight ratio, far exceeding any comparable material.

The glass to epoxy ratio is 75% glass to 25% epoxy, resulting in the desired composite material of virtually indestructible glass, sheathed in a closed molecular epoxy.

From the viewpoint of the Environmental Industry, this has become an extremely valuable product, desired both for its chemically inert structure and its low cost.

There are several different types of Fiberglass casing and pipe materials on the market, so it is important to differentiate between F.W.S. products and others.

F.W.S. produces and markets the ONLY fully tested, Inert material available

All other Fiberglass systems are manufactured with a vinyl ester, plastic or untested epoxy resin material.

Most of these materials are capable of high absorbance or leaching of priority pollutants.

F.W.S. Inc Products are Intrinsically Incapable of leaching any priority pollutants.

Materials Exceed ASTM  F-480 physical specifications, however, F.W.S. does not use the 2 thread/inch configuration.

Crossovers are available for matching other thread designs, including the F-480﷓90.

Testing Summary

The following sorption and leach tests have been carried out on production run samples of F.W.S. F.R.E. casing materials.

An independent, E.P.A. approved laboratory performed all tests. Detection limits were in accordance with current ( at the time of testing ) E.P.A. Priority Pollutant standards or below.

All tests were carried out on either ground up material for maximum sensitivity, fractured casing to simulate slotted sections, or two foot casing samples which include a threaded o-ring seal and a threaded coupling.


1. 72 hour leach tests using fractured material, in carbon filtered, de﷓ionized water carrying 700 ug/l of solvents and Halogenated Organics.

No extraneous compounds on the GUMS chromatogram and no increase of the seven solvents occurred.

2. Leach tests on ground F.R.E casing using carbon filtered, de﷓ionized water, 72 and 504 hours.

Leachates subjected to full Priority Pollutant analysis showed zero leaching.

3. Leach tests using sample lengths of F.R.E. casing including a joint with an O﷓ring seal for 504 hours.

No Priority Pollutants found in the leachate.

4. Absorbance (Sorption) tests using water doped with 700 ug/I of four Halogenated Organics and three solvent organics.


In 72 hour tests, F.R.E. casing performed better than one hour tests using Teflon laboratory tubing. It has been calculated that F.R.E. casing will reach sorption equilibrium in 15 days compared to 330 days for Teflon and other Thermoplastics. (Analytical

Procedures conformed with appropriate E.P.A. methods 608, 610, 612, 622, 624 & 625.)

The objective of the tests was to determine if any Volatile Organics, selected from compounds commonly found in Hazardous

Waste sites, would be absorbed by the F.R.E. casing from an aqueous solution, using concentrations of organics comparable with those experienced in pollution plume surveys.

Simulation of monitor well casing conditions was sought by testing fractured pieces, exposing the inner structure of the casing as with machined slots.

The test protocol followed recommendations of the Colorado Department of Health, Region 8 E.P.A., and the City and County of Denver.

All tests were performed by Rocky Mountain Analytical Laboratory, Arvada, Colo.