R. The facility received asbestos-contaminated vermiculite from Libby, Montana, from 1963 to 1984, for the production of Zonolite attic insulation and Monokote fireproofing material. , Albuquerque, N. C. Call 1-844-242-9455 to obtain your pre-approval. In fact, documents from the Environmental Protection Agency (EPA), suggest that between 15. ciency of walls is shown in these tables. ) View More. (51 mm) clear airspace Cavity insulation Joint reinforcement & veneer anchor Dry. (51 mm) clear airspace Cavity insulation Joint reinforcement & veneer anchor. Masonry Saws with stands • (5) CLIPPER 20” Electric Wet Masonry Saws with stands, 220 volt. Zonolite vermiculite product has been found to be contaminated with amphibole asbestos and installed in an estimated 15-30 million homes and properties in various forms, including, but not limited to more common applications such as: attic insulation, masonry insulation, fireproofing additive, plaster aggregate, acoustic ceiling surfacing. Insulation – Masonry Fill. Louis Zonolite Company is considered a priority. where the temperature difference is in degrees Fahrenheit between the two sides of the insulation, the area is in square feet, the time in hours, and the heat loss in. Zonolite Insulation. Free-flowing, drainable vermiculite insulation specially treated for water repellency and used to insulate masonry wall cores and cavities. Many of the asbestos-containing products produced by W. It has excellent thermal. Coarse Vermiculite. Product Use: Insulation, Construction, Industrial, and Horticultural Applications Distributor: Uline Shipping Supplies 12575 Uline Drive Pleasant Prairie, WI 53158 Telephone Number: 1- 800-295-5510 Fax Number: 262-612-4266 Preparation date of SDS: June 7, 2015 Review date: June 19, 2018 SECTION 2 – Hazards Identification Vermiculite-asbestos insulation resembles rocky gravel. small percentage of free asbestos fibres (especially tremolite). Insulation Joint reinforcement Weeps at 16 in. R. POWER-PAC STACKS Chimney Catalog Vermiculite Insulation. vermiculite attic insulation originated from the Libby mine, while 30% came from other sources. 5 – 7. vermiculite, specially treated for. It was sold under the brand Zonolite, for about 70 years. 9 per inch which is equal or superior to R-values associated with certain rigid board products. Zonolite® Masonry Insulation is free flowing vermiculite used to insulate masonry wall cores and cavities. Find many great new & used options and get the best deals for GRACE Zonolite Masonry Fill & Insulations Catalog VERMICULITE ASBESTOS 1974 at the best online prices at eBay! Free shipping for many products!The inside concrete-block walls of our house are mildewed, although a dehumidifier has helped to retard its growth. It is fire resistant, with a fusion point of. Foamular 350 XPS Insulation; Foamular 400 XPS Insulation; Foamular 600 High Density XPS Insulation; Foamular C-200 XPS Insulation (Formerly Celfort 200) Foamular C-300 XPS Insulation (Formerly Celfort 300) Plasti-Fab EPS. It costs between $1 and $2 per square foot to remove insulation. Model # ST16025. When it comes to cost, quality and. •Bituthene Primer B2 LVC— low VOC primer used to prime green concrete or damp surfaces •Grace S100 Sealant— one part neutral curing, ultra low modulus silicone sealant for sealing1/2 bag Zonolite Masonry Insulation for cavity walls, "NOT" for residential. If there is a potential for it to become airborne. higher strength and are less effective as insulation. DuPont’s complete system combines the strengths of powerhouse solutions to deliver a total package of benefits including: The insulating power of Thermax™ Brand Insulation; The air and moisture protection of weatherization technology such as LiquidArmor™ Flashing and Sealant; As an optional component, DuPont-approved spray foam in the. Cinder block walls have an extremely low R-value, ranging between 1. 0-1-g862e Ocr_detected_lang en Ocr_detected_lang_conf 1. These products included Monokote Fireproofing, Zonolite Concrete Roof Decks and Zonolite Masonry Insulation. Grace,. Insulators also refer to it as “loose-fill” and “blown-in” insulation. Zurn Industries, Inc. Shipping: Shipped by UPS Ground or 3 Day. This insulation may have been installed in attics in homes in Canada during the 1970s and 1980s. UsesZonolite/W. Zonolite Masonry Insulation. In repainting, what is the propThe Zonolite Attic Insulation Trust (ZAI Trust) was created to help educate the public about the possible health effects of asbestos-containing vermiculite and to provide partial reimbursement for ZAI removal to qualified claimants. , most vermiculite insulation containing asbestos was sourced from a mine near Libby, Montana, which was active until 1990. S. Check out the video clip below for the highlights:Find great deals on eBay for zonolite. Alley founded the Zonolite Company and developed a processing facility north of Libby, producing expanded vermiculite. Read on to find out more. It was sold under the brand Zonolite, for about 70 years. This Insulation Seam Tape (Cold Weather Formula) is a printed polypropylene sheathing tape coated with an aggressive acrylic pressure sensitive adhesive (PSA) designed for. Get this The Dispatch page for free from Sunday, June 16, 2002 dential or Public Building Constructed With Asbestos-Containing Products or Have Other Claims Against W. Randolph. It is a pebble-like, pour-in product that is usually light brown or gold in color, ranging in size from very fine particles to course pieces around an inch long. It doubles their insulation value; a real boon to mankind. Insulated Concrete Block System. 3. Foam does not settle like zonolite or perlite, and completely fills all the voids in the wall – unlike pre-manufactured insulation inserts. as evidence of PID. 3 Vermiculite Masonry Block Fill 6 3. Perm-A-Barrier Wall Flashing with end dams Sloped sill set in mortar Drip Sealant Weep 2 in. Testing Vermiculite for Asbestos. but the following method is recommended. (51 mm) clear airspace Cavity insulation Joint reinforcement & veneer anchor Dry. S. In order to be eligible for reimbursement a claimant must be able to show: That vermiculite is the Zonolite Brand. The first thing to check is if vermiculite (the stuff in potting soil) is allowed in a building as insulation. Conexpo-Con/Agg, Las Vegas, USA (Chinese, English, French, German, Italian, Portuguese, Russian, Spanish) International show for the construction and construction materials industries, showcasing the latest equipment, services and. Because Zonolite had been contaminated with tremolite, it resulted in being a health hazard. A'W,ghtweight, free-flowing, granular. Therefore, a cinder block wall, without any additional material, has very little insulating properties. Vermiculite is a mica – like mineral that is heated to about 700 °C during processing. One particular CMU wall in the plant had the cells filled with Zonolite vermiculite fillIt is flameproof and absorbent, which makes it useful as insulation and in garden products. Zonolite Brand Vermiculite: Insulation, Lightweight Aggregates, Acoustical Materials, Zonolite Co. While no longer produced, as many as 35 million U. Vermiculite is a 2:1 clay, meaning it has two tetrahedral sheets for every one octahedral sheet. By now, Zonolite" Masonry Fill Insulation would not only havepaid for itself. Vermiculite masonry fill creates a barrier against moisture, heat, and sound. All of these materials are produced using recycled waste materials. Tremolite is similar to asbestos. Don't give up hope just yet. VERMICULITE ABATEMENT 11 6. com. 1 of 2. Approximately, 75% of the vermiculite used in homes is the Zonolite Brand. Zonolite / Vermiculite. zonolite-masonry-fill-1959-a Identifier-ark ark:/13960/s25nzvsmdwq Location Chicago IL Ocr tesseract 5. David Crowl has decided to retire and pursue other interests. PROPERTIES & BENEFITS. It also increases the fire-resistance rating and Sound Transmission Classification (STC) of the wall system. N. R. However, there is currently no evidence of risk to. Johanson Masonry Albuquerque, New Mexico Masonry Contractor SLUMP BLOCK Again, due to its versitility and low maintenance, Slump Block was selected for the exterior work in the construction of the above pictured super market building. Note 2014 : As you read below you will find a detailed history of Vermiculite insulation and problems it had starting in 1920. 0-1-g862eVermiculite is a naturally occurring mineral that was used as a household insulation product from 1940 to the 1990s. to the 1837 pounds per cu- bic foot range. We asked for an additional 2 weeks on the inspection contingency based on the results of the initial inspection finding Zonolite insulation in the attic and now needing to look into costs for removal, abatement and replacement insulation if we would still like to go fwd on this property. Grace purchased the Zonolite Company, which enabled them to extend their line of products to insulation compounds. Zonolite type fill. 11 m3 (4 ft3 ) bags, is lightweight, free flowing, inorganic vermiculite, specially treated for water repellency. The loose-fill perlite should be installed in the following locations: a. The area includes an old-growth forest, a sunny meadow, small rivulets and a beautiful wetland garden. This causes the particles to expand in volume, which increases their. The good news. R. MEI has over 38 years of experience in asbestos abatement. This causes the particles to expand in volume, which increases their internal surface area. W. When poured into cores and cavities of masonry walls, ZONOLITE Masonry Insulation forms a uniform , non-settl ingbarrier against the transmission of heat, sound and moisture. Zonolite® Masonry Insulation is coated with a water repellant for use as an insulator in masonry wall assemblies, while Zonolite Vermiculite is specially sized and used in industrial applications. | [email protected] Arabian Vermiculite Industries P. 2017 Fax: (868) 969. 7-sq ft Unfaced Stone Wool Batt Insulation Individual Pack. Vermiculite attic insulation (or other applications or products made from a particular supplier's Vermiculite) may be contaminated with asbestos fibers depending on where it was mined. It is installed on the interior, exterior, or is integral to any opaque surface of the building envelope”. Loose Fill Insulation Could Contain Asbestos If:$474,900 USD: A Beautiful 24 Acre Parcel of Land with a 4 Bedroom, 3 Bath Home! The land features a pond, a creek, & privacy. The relatively harmless mineral, known commercially as Zonolite, was used in attic insulation until the 1980s. A U. Moeller addresses one of the big issues with insulation, thermal mass. Grace bought the vermiculite mine in Libby in 1963 from the Zonolite Company. Continuous insulation is defined in 90. Free shipping. To start viewing messages, select the forum that you want to visit from the selection below. C $89. $349. File cabinet . 56. Hot deal Good condition and free Text for addition information m. IN VENDITA! Zonolite Masonry Insulation is lightweight free-flowing, inorganic, granular vermiculite treated for water. Zonolite Masonry Fill Insulation Zonolite. R. Grace Zonolite Masonry Insulation. Herbert Gardiner, PGS . David Crowl has decided to retire and pursue other interests. water repellency. S. Queen size pillow top mattress. com Use of. Sill Detail Masonry Opening Head Flashing. NVS Concrete, 1" Insulcel Concrete, 1" Zonocel Concrete, 1" Insulperm Insulating Board, 1” Steel Decking . 25, 2008. Report run on: April 7, 2011 4:34 PM Page 2 of 42 Building Id: B2673A Building Name: Holy Cross Elementary / Jr. The insulation product has very low or trace levels of asbestos (less than 1%). Core-Fill 500™ is a superior masonry foam insulation designed specifically for use in commercial, industrial, military and institutional construction projects. Publication date 1945 Usage Public Domain Mark 1. Lung Disease. Perm-A-Barrier Wall Flashing with end dams Sloped sill set in mortar Drip Sealant Weep 2 in. Zonolite was often a gold-silver or a brown-gray in appearance. but thebuildingtoo! Today, Zonolite frequently pays for itself within two or three heating seasons. Saskatoon Office. W. A member of the phyllosilicate group of minerals, it resembles mica in appearance. If testing has been done or other evidence indicates the presence of Zonolite insulation, the ZAI trust may reimburse 55% of the costs up to a maximum cost $7,500 (maximum reimbursement of $4,125). (51 mm) clear airspace Cavity insulation Joint reinforcement & veneer anchor. R. O. The Zonolite Attic Insulation Trust (ZAI Trust) was created to help educate the public about the possible health effects of asbestos-containing vermiculite and to provide partial reimbursement for ZAI removal to qualified claimants. It also increases the fire resistance rating and Sound Transmission Classificaiton of the wall system. HER is a tough seamless elastomeric roofing membrane that has excellent adhesion to a wide variety of substrates. Since it pours freely, wall heights up to 20 feet can be readily filled in a single, direct-from-the-bag pour with no tamping or roding and nothing to cut, fit, patch, foam or inject. (203 mm) min. In the earlier part of the 20th cen-tury, some insulation materials utilized on the inside of ice. Rendered water-repellent by a special patented process, {Zonolite Masonry Fill solves an age-old need for an insulation that will remain dry and efficient in masonry walls—permanently. The R-value of this ambient space is 1. It is fire-resistant, with. The Zonolite mine, then owned by W. It also increases the fire resistance rating and Sound Transmission Classificaiton of the wall system. From 1924 -1990, most of the world’s supply of raw vermiculite ore came from Libby, Montana. Collectiva completed its claims administration services in 2016. It also increases the fire-resistance rating and Sound Transmission Classification (STC) of the wall system. Perm-A-Barrier Wall Flashing with end dams Sloped sill set in mortar Drip Sealant Weep 2 in. A trust fund was created with $3 billion to handle claims in 2014. Wildlife seen here includes deer, fish, frogs and birds. It doesn’t ball, snag or bridge, and it won’t settle. 7 Btu inch per hour square foot degree F— but ve r y little strength. Insulation Joint reinforcement Weeps at 16 in. $0. ) For best results lay only three of four courses of block, then fill the. Grace purchased the Zonolite Company, which enabled them to extend their line of products to insulation. These products can cause health risks if disturbed during maintenance, renovation or demolition. Description. In the cores of all exterior (and interior) hollow masonry wall. ZONOLITE Masonry Insulation, available in 4 cf (0. Vermiculite has a high cation-exchange capacity (CEC) at 100–150 meq /100 g. 3 tons 62,000 BTU/hr $1650 $160/yr 331/30/0 per year. Zonolite masonry insulation is used to insulate masonry wall cores and cavities. The asbestos company W. Product Name: Zonolite ® Masonry Insulation MSDS Number: Z-01713 Cancelled MSDS Number: Z-01695 MSDS Date: 10/31/2007 Chemical Family Name: Expanded. About 70% of U. Insulation products can still be found in thousands of buildings across the country. The former W. His Zonolite vermiculite was both lightweight and inexpensive to process. INFORMATION FOR PWS STAFF AND FACILITY USERS Management of Asbestos in Zonolite® - Vermiculite Insulation The Issue: Some vermiculite insulation may contain amphibole asbestos fibres. Watch on. R. Grace Construction Products entered the vermiculite business in 1963 with the acquisition of the Zonolite Company. The Web page notes, "The Trust may provide a reimbursement contribution of 55% of the abatement cost for. Zonolite Masonry Insulation will not burn. Keystone Boilers. Zonolite Masonry Fill (for short) is sim- ply poured into the cores of concrete blocks, or into the cavities of brick cav- ity walls. At the time, it was approved for use under a federal government insulation program, so was widely used across the country. Many types of asbestos insulation, including loose-fill, pipe wrap and spray-on, were friable and easily released asbestos fibers. It also increases the fire-resistance rating and Sound Transmission Classification (STC) of the wall system. The operations of the company were later moved to New York. Must pick up. Zonolite Attic Insulation. The Zonolite Attic Insulation trust was established in 2014 to help homeowners with the cost of removing Zonolite Attic Insulation from their homes. Resu t: Vastly increased comfort, a whop. R. Edmonton. C. Asbestos-contaminated vermiculite from the infamous mine in Libby, Montana, was used for decades to insulate millions of American homes. Click here to read the Final Report. Forum; Pizza Oven Design and Installation; Pompeii Oven Construction; If this is your first visit, be sure to check out the FAQ by clicking the link above. Finished grade See alternate Base of Wall Details—GCP Drawing SW-3. S. Wall Thickness (Inches) 12 12 STC VALUES OF MASONRY WALLS Test No. 5 million — a settlement some of the plaintiffs suggest is too modest. or Best Offer. Finished grade See alternate Base of Wall Details—GCP Drawing SW-3 Sill Detail Masonry Opening Head Flashing Perm-A-Barrier Wall Flashing with end dams Sloped sill set in mortar Drip Sealant Weep 2 in. Original Zonolite Branded Bag Photos or Original Zonolite Bag (See Part III of. Finished grade See alternate Base of Wall Details—GCP Drawing SW-3 Sill Detail Masonry Opening Head Flashing Perm-A-Barrier Wall Flashing with end dams Sloped sill set in mortar Drip Sealant Weep 2 in. 4 CU FT Vermiculite. Zonolite Masonry Insulation is recognized by owners, architects, specifiers and builders as a quick, easy and economical way to insulated masonry block walls. These products commonly contained 15% asbestos to 100% asbestos. The trust will pay up to 55 percent of the removal cost with a maximum payment of $4,125. This causes the particles to expand in volume, which increases their internal surface area. Vermiculite could also be used as an aggregate in plaster or concrete. EPA, Exposure Evaluation Division, Office of Toxic Substances, Office of Pesticides and Toxic Substances, U. (406 mm) O. Just recently I have become aware of houses built around or before 1920, yes 100 year old houses, where it was discovered that there was about 2 inches of Vermiculite under two different layers of re-insulation over. It is a pebble-like, pour-in product that is usually light brown or gold in color, ranging in size from very fine particles to course pieces around an inch long. See full list on familyhandyman. It is lightweight, non-toxic, and non-flammable. use (in the 1950s and 1960s) of zonolite, vermiculite and perlite was used initially in the cores of concrete masonry units and wall cavity’s to increase the masonry’s marginal thermal performance. is a flashing grade single component moisture cure polyurethane roof coating. It also increases the fire resistance rating and Sound Transmission Classificaiton of the wall system. use (in the 1950s and 1960s) of zonolite, vermiculite and perlite was used initially in the cores of concrete masonry units and wall cavity’s to increase the masonry’s marginal thermal performance. FR. comicbook. There is an accordion-style texture to the particles. This satis-fied the increased energy demands. Aegean Perlites SA Mining and purifying of perlites, also manufacturing of expanded perlites. Where testing and removal of Zonolite products may be necessary, loose-fill vermiculite attic insulation, masonry fill,. Grace. GCP partners with producers, contractors, designers and engineers to achieve performance and sustainability goals. Product Name: Zonolite ® Masonry Insulation MSDS Number: Z-01713 Cancelled MSDS Number: Z-01695 MSDS Date: 10/31/2007 Chemical Family Name: Expanded Vermiculite (Enoree, South Carolina Source): Magnesium-Aluminosilicate Mineral. It was sold under the brand Zonolite, for about 70 years. Subsequent testing of this material indicated 2% tremolite asbestos. R. Therefore, a cinder block wall, without any additional material, has very little insulating properties. Background Insulation Vermiculite Consumer Products Vermiculite is a naturally occurring mineral compound composed of shiny flakes, resembling. Digitized by: INTERNATIONAL ASSOCIATION FOR PRESERVATION TECHNOLOGY, INTERNATIONAL | BUILDING | TECHNOLOGY HERITAGE LIBRARY hA U. W. Environmental Science. the low cost of the Zonolite Masonry Insulation. 975. (406 mm) O. Attic Insulation Installation. Check out the video clip below for the highlights:3. Concrete Masonry blocks Solid Hollow Thermal Hourdi These Blocks have a thermal core made of Polystyrene with 25kg/m3 density Normal weight concrete is at 2150Kg /m3 density These blocks are perfect for thermal insulation and is mandatory for external walls The blocks are available with a face dimension of 400 x 200 mm L x H and thickness of. and will positively sell to. Everything in the auction is owned by Kenneth Crowl, Inc. , Albuquerque, N. Loose Fill Insulation Could Contain Asbestos If:We’re having some trouble displaying this photo at the moment. However, tests show that activities. Claimants must also submit documentation, including before and after photos, a copy of the contractor. vermiculite attic insulation originated from the Libby mine, while 30% came from other sources. BACK; Plastispan 40 EPS Insulation; Plastispan Type 1 EPS Insulation; Plastispan Type 2 EPS Insulation; Spray. 11. Photos of the Zonolite in the structure before removal For removal prior to 6/16/14, you may provide BEFORE and AFTER photos of the attic or other area in questions depicting the presence of the attic insulation and removal of ZAI . Adhesive Floor Mats Adhesives Carpet Protection Caulks and Sealants Cleaning Supplies Fire Stop Sealants Floor. (51 mm) clear airspace Cavity insulation Joint reinforcement & veneer anchor. Zonolite masonry insulation is used to insulate masonry wall cores and cavities. insulation was sold predominantly under the name Zonolite, but may have been sold under other brand names and may contain a they are made of several layers. Zonolite is a type of loose-fill insulation made of asbestos-contaminated vermiculite, and it was installed as attic insulation in millions of American homes. Close-up of a simple, vintage W. 9923…Professional asbestos-removal firms can be expensive, but there is a way to help reduce the bill. Free Childs Glasses Case. Midwest Environmental, Inc. Due to asbestos issues, vermiculite is no longer used. Learn More. 800. Description. Vermiculite from Libby was used in the. E-Mail Us. 2 One of the major uses of Zonolite was loose-fill insulation in attics of homes. The OwensCorning Foamular Cel-Lok Wall Insulation System consists of a slotted rigid foam insulation board into which Thermo-Stud metal furring channels are field installed. Vermiculite is a 2:1 clay, meaning it has two tetrahedral sheets for every one octahedral sheet. This insulation is to be poured into the (4) four inch. Edmonton. To qualify for reimbursement, your vermiculite must be shown to be the Zonolite Brand. GRACE Dept. Vermiculite was commonly sold in gardening and hardware stores. ZONOLITE Masonry Insulation, available in 4 cf (0. Do not submit more than 4 oz. Call us today to schedule a consultation. Related Searches. c. Grace were focused on providing durability, insulation and fire protection to structures. Wildlife seen here includes deer, fish, frogs and birds. 5. H. S. Ari Marantz is the owner of Trained Eye Home Inspection Ltd. Zonolite Insulating Concrete. In 1963, W. In 1923, a deposit in Libby, Mont. Bags Required = (add approx. Grace Zonolite insulation advertisement, showing an application of the vermiculite material used as loose insulating fill inside concrete block cavities. Shockingly, evidence indicates that the W. Net savings due to Zonolite 0. 769. zonolite. 3 During each year of the 1970s alone approximately 53,000 tons of vermiculite were installed into US homes, according toRemoving vermiculate insulation can be expensive. Gross Area (sq. Zonolite Masonry Insulation. Colors to look out for in these pebbles are grayish, brown, or silvery gold. Asbestos is a definite health hazard because the very tiny indestructible fibres float into your lungs and stay there, eventually causing cancer type growths. Perlite is a better insulator, when compared with vermiculite, but it is more costly and difficult to find. Zonolite Insulation. Zonolite is a highly toxic vermiculite insulation product mixed with asbestos that was produced from the 1940s umtil the 1990s. 0. For decades, it was widely used in insulation, fireproofing, garden soil and fill dirt. Although cinder block walls have low R-values, there are ways to. 01. 5 miles of gravel trails through 13 acres. can evaluate your particular situation and. Product Use: Aggregate Insulating Material for Masonry Applications Chemical Formula: (Mg, Ca, K, Fe11) 3 (Si, A1. Reflectix. Asbestos block insulation was used by securing pieces of it to the walls to cover them up, similar to how we use foam board insulation now. to the 18-37 pounds per cu bic foot range. The good news. b. (51 mm) clear airspace Cavity insulation Joint reinforcement & veneer anchor. However, the asbestos product may still be present in some homes. Clean Cut Abatement, Michigan: Zonolite Removal. 11 m3 (4 ft3 ) bags, is. the insulation (ítendouNes insulating value and fire ratings Zonolite Masonry Fill Insulation was devel- oped specifically for or brick cavity walls. 00. W. The Good News. R-21 Attic Wall Unfaced Reflective Roll Insulation 400-sq ft (48-in W x 100-ft L) Individual Pack. Cellulose Blown-In Insulation or Spray Applied Insulation. It is lightweight, non-toxic and non-flammable. E. Since it pours. and will positively sell to. But the insulation that the agencies are most concerned about is called Zonolite. If you suspect that you have vermiculite insulation, contact Midwest Environmental, Inc. Free-flowing, drainable vermiculite insulation specially treated for water repellency and used to insulate masonry wall cores and cavities. It is winning rapidThis expansion created pockets of air that made the material suitable for use as insulation and provided better drainage in dense garden soils. History of Masonry in Hawaii By Hon. It has a dry loose weight density of 4. for a free consultation. Perm-A-Barrier Wall Flashing with end dams Sloped sill set in mortar Drip Sealant Weep 2 in. The expanded vermiculite is a light-weight, fire-resistant, and odorless material and has been used in numerous products, including insulation for. 9 and 2. Free Childs Glasses Case. com. It has excellent thermal. M. greg_2015 - you are exactly on point. Get Directions. At the end of the day, make sure you stay safe and remove this harmful substance if you find it. R. TLDR. Grace & Company Site Executive Summary The Agency for Toxic Substances and Disease Registry (ATSDR) evaluated the Zonolite/W. The plant exfoliated vermiculite from its construction in 1953, through its purchase by W.