b'NEW GLASS PRODUCTSContinued from page 14 walkways, extensive areas would have FOR ROOFINGto be torn up to determine the source of any leaks." A PROCESS for making commercialsludge, strong and durable tiles can beUnited Roofing & Waterproofing has qualityglasswoolfromtheglassformed by relatively simple techniques,assigned a 50-man crew working under fractionofmunicipalincineratorhesaid,addingthat suchtileshavesupervisionofJohnGarito,general residue has been developed by the U.S.beencomparedfavorablywithcom superintendent,andFranDiGatano, Bureau of Mines. According to Alan H.mercially available roof, floor and wallproject superintendent. The contract is Goode, U.S.B.M. Research Laborator tiles.oneofthe largest the firmhasever ies,Tuscaloosa,Ala.,theprocessFourofthenewwasteglasspro handled, second only to the $1.6-million employsstandardore-dressingmeth ducts, glass-rubble construction panels,project at the Pan American terminal, ods to extract glass fragments from theterrazzo,glasswoolinsulationandjet center, and hangar. ashthatisleftwhenrefuseisslurry seal for roof construction, haveThe World Trade Center is a project incinerated.Thereclaimedglassisbeenjudged"economicallyviableasof the Port Authority of New York and thenmeltedandfiberizedintoglassbasesfornewmanufacturingopera NewJersey.Whileitsdominant wool suitableforuse as an insulatingtions,"saidDavidBenderskyandfeatures are its twin towers, each 1,350 material.William R. Park of Midwest Researchfeet high, or 100 feet higher than the Discarded bottles and jars also canInstitute.EmpireStateBuilding,thecomplex be turned into foamed glass insulation,AccordingtotheMRIreport,will include a total of seven buildings in said Dr. A. Sosin of the University ofbuilding panels made from waste glassadditiontoundergroundshopping utah,Salt LakeCity.Usingcalciumshouldoffer "an extremely attractivemalls, banks and restaurants. carbonateandautoclavingmethods,productformanufactureinselectedThetwintowerswhichloomover university researchers have been ableareas at a moderate scale of operation."lowerManhattanweredesignedby to produce large pieces of foamed glassThedecorativequality of the panels,architect Minoru Yamasaki. When the withexcellentinsulatingcharacter thereportstated,willmakethemW arid TradeCenter iscompletedin istics,hesaid.Potentialmarkets forcompetitivewithpanelscostingfar1974,itwillattract 130,000workers theproductincluderoofdeckmore to produce.andvisitorsdaily. insulation,aswellasindustrialandIn marketing glasswoolinsulation, cryogenic insulation, Sosin said.the report said, theglass wool manu OSHA (Continued from page 13) facturer who uses reclaimed glass will Dr. Douglas Mackenzie of the Uni hold"about a$10-per-ton cost advan obligation under this Act is to provide versityofCaliforniaatLosAngelestage" over firms using traditional rawfor the jobfety of his own employees. sasaid he believes a wide range of usefulmaterials and production methods.If acontractor failsto complywitha buildingproducts,includingtileandTheterrazo market isapremium safety standard, he is notlation of in viopanels, can be made from foamed wastepriced one for suitably sized and color theActunlesssomeofhisown glass. When pulverized containers aresorted glass chips, the study concluded,employeesare therebyexposedto a mixed with other solid wastes such asandcouldwellresultinahighlyhazard. On the other hand, if Contracflyash,treatedmanureandsewageprofitable small-scale operation.tor Ahas scrupulously complied with all safety standards and his employees are working in an area which is hazardous because Contractor B has failed to ASPECIFICATIONSerectperimeterprotection,sfor FEDERAL example, Contractor A isin violation TOREQUIRE(ContractorBisalso ifhehas employees workingthere). ECYCLEDMATERIALSYou violate the Act when you expose youremployeestohazardregardlessofwhocreatedthe THE GENERAL SERVICES Admincfrom 40 to 100 percentrecycled fibershazardous conditions. istrationhas announced that Federaland material. Roofing felt must contain procurement specifications for roofingrecycled material equal to at least 40 felt andbuildinginsulationmaterialspercent of the total paper stock weight, have been revised to require increasedincludingaminimum30percentof use of recycled materials.reclaimedpost-consumerwaste. "The new specifications will affect allChanges covering purchases of insulafuture purchases of these products fortionmaterialrequirean80percent GSA\'snationwideconstructionpro recycled content for blanket insulation, gram," said Arthur F. Sampson,headincluding40percentpost-consumer of theagency."Thisispartofthiswaste and 100 percent recycled content agency\'scontributiontotheNixonforloosefillinsulation,withnoless administrationcommitmenttohelpthan 90 percent post-consumer waste. clean up our environment.Sampson said that specifications are "Theprocurementofconstructionbeingwrittentotakeintoaccount materialsandpaperproductswithaindustrycapabilitytomeetnew specified recycled fiber content acts asrequirements while maintaining estabapowerfulstimulusforindustrytolished product performance levels. "As expanditsuseofrecycledmatter,"industrialtechnologyandcapabilities Sampson said.increase, GSA will continue to revise ThenewguidelinesspecifythatFederalprocurementregulationsto roofing felt, thermal blanket insulationrequire maximum feasible levels of re "I don\'t hafta study. Dad said I could start and Type I loose fill insulation containcycled matter inour purchases."as roofsoonnough." estimator asas I am old eApril 197316'