Document V3L48xakKJ8VvxvmL9nzJxG1N

FILE NAME: Hercules Chemical (HERC) DATE: 1983 Aug 3 DOC#: HERC018 DOCUMENT DESCRIPTION: Consultant Report - Furnace Cement - Hercules Product Examined Under Various Conditions for Release of Asbestos Fibers 09/20/01 T H U ,15:34 FAX 701 237 9035 BOECHLER, P.C. THOMPSON, P.C. @198 Case Consulting , Laboratories Inc. 622 nOUTE TEN W H ir P A N Y . N E W JERSEY 07901 (201) 428-91566 A u g u s t 3, 1983 To. - From; Subject: Mr. N. George Tucker Vice President - Manufacturing Hercules Industries Incorporated One-Eleven South Street Passaic, New Jersey 07055 Charles Anthony Furnace Cement In ac c o r d a n c e w ith the authorised work plan, samples of the Hercules product, "For Heat's Sake," were examined under various c o n d i t i o n s to d e t e r m i n e if there could be a r e l e a s e of asbestos fibers. This report details the methods of evaluation and the findings. methodology . ' The a s - r e c e i v e d cement was used to make samples that would simulate different conditions of cure and use. The objective was to determine if any free asbestos fibers could be released itt h a n d l i n g or usft o f the p r o d u c t in d i f f e r e n t t&t6S of curs. <y- A s - r e c e i v e d , the m a t e r i a l is a thick, fluic mixture, g r a y ish in color. V a r i o u s m o l d s w ere tried and a selection was mad for use i n f o r m i n g t e s t b a r sections. The b e s t choice m o l d c o n sisted of a 3/4" dia m e t e r plastic pipe cut longitudinally to treduce a h a l f - r o u n d cross section about 2V* long. The inside surface was lined with thin vinyl sheeting to prevent adhesion if the c e m e n t to the m old. Three conditions w e r e simulated for these determinationst 1. F u l l y c u r e d in acco r d a n c e with label instructions 2. P a r t i a l l y cured. 3. W a t e r d i l u t e d m a t e r i a l dried on tools w i t h o u t any curing, just room temperature drying. For c o n d i t i o n s U and 2, as-rec e i v e d cement was troweled into the mold to form a half-round cross section. T i ?H K 09/20/01 THU 15:35 FAX 701 237 9035 BOECHLER, P.C. j^l -- S -<=? F R T 1 0 ; S H E E C U L E S C H E M I C A L . THOMPSON, P.C. @199 C O P - 3 Mr- N. G e o r g e T u c k e r H e rcules Industries Incorporated A u g u s t 3/ 1983 Page Two SAMPLE PREPARATION Duplicate samples were made and cured m ion: the following fash- g u l l y Cured. 4- 4 mold for one hour @ 220F, so that i a d ' b r i ^ m w e a frSS the old and handled. Tha bat it could be r e m o v e s rt1aze(3 tile and transferred all at 300 t o J O O ^ tot . i - SSSU . S " lSn.l 30 minutes, temov.d and cooled to room temperature. Partially Cured a /-nvArl in the same m a n n e r at 2 2 0 ? and t ^ n ^ l ^ a t ' S oW m SS 30 to 35 before cooUn9 to room temperature. Air-Pried , ^,,4-4-v Vnife were stirred in furnace cement A trowel and 4 _?^ty done-third with water. These uten- that had been diluted - hh t room temperature iSo25i,45* S r i .1 on the *or*ihS blades. SAMPLE USE . fitter the samplesst|uedrwatetahichPhadbbeen especially ntepadlyni i - `ion Stoi9h illipote filters to remove any fibercus or particulate material* The t est b a r 1w e r f i 3a e e m ^ n t 1 l a y - u p ^ e n The S p a l l e d or re- l e a S U U U ^ i i r S a s ^ p t u r a d in the e s p e c U l and immediately capped. * f * ^ alnlng r e c o v e r , simulating the tools together vfr crape the blade to remove the a cleaning motion T ^ c J U n t had hardened so that only dust deposit of cement. T,,e av like amounts were released this way. 09/20/01 THU 15:35 FAI 701 237 9035 BOECHLER M o v - g ? 7 '^-2------E _ E 2-1 1 ; 5 1 H E R C U L E s P.C. CH E M XC H - THOMPSON, P.C. @200 C O R . 4 Mr. N. George Tucker Hercules Industries Incorporated A u g u s t 3, 1983 Page Three DETERMINATION OF ASBESTOS FIBERS The collected samples were then p r o c e s s e d to isolate th fibers, t r e a t e d to visualize them a n d d e t e r m i n e d by- t r a n s m i s s i o n electron microscope techniques in accordance with e p a procedures for detecting and estimating asbestos fibers. The identifica tion of the fibers is made by morphology and electron diffrac tion patterns. A fiber is described as a p a rticle with parallel sides and a length to width ratio of 3*1. RSSUbTS AND DISCUSSION The E P A m e t h o d is the m o s t r i g o r o u s a n d precise m e a n s of detecting and estimating the presence and concentration of asbestos fibers. The experimental procedures for collecting and examining samples of the furnace cement f servative worst case situation. Samples of substantial cross sections w e r e b r o k e n so as to c o l l e c t all of the fragmented m a t e rial without benefit of air dilution or gravimetric S t t U n g . Therefore, any p o t e n t i a l actual a i r b o r n e e x p o s u r e rfould be m u c h lower than any values found by these procedures of collection. The O S H A r e g u l a t i o n for w o r k e r e x p o s u r e to asbestos fibers has two standards. One is a t i m e - w e i g h t e d 8-hour average to which any employee may be exposed. It stipulates number and size of fibers; a maximum of 2 fibers, longer than 5 microme ters r>er cc. of air. The other s t a n d a r d is a ceil i n g concen tration which states that no employee shall be exposed at any time airborne concentrations of asbestos fibers in excess of 10 fibers, l o n g e r than 5 m i c r o m e t e r s , p e r cc. c l air. ThI standard is not time-weighted. . In E x h i b i t I, attached, c o n c e ntrations are exP * * s*J total fibers pe r c ubic meter and as f i b e r s p e r cc. for ea h the OSHA standards; work day and ceiling limit. A ? I* also given to show the concentration of fibers, 5 micrometers or more, for comparison with OSHA limits. Examination of the dimensions of the fibers measured in the samples shows that all of the f i b e r s m samples 1, 2, 3 and 4 are less than 3.S micrometers in length. in s a m p U maximum length noted was 3.2 micrometers. Sample 6 had & tew fibers larqer than 3-5 micrometers, but only 1 percent of the total was above S micrometers in length, e q u a l to 24 fibers/cc- 09/20/01 THU 15:36 FAI 701 237 9035 BOECHLER, P.C. Cl =* -- -s* F R I M E R C O L E S -OME M I THOMPSON, P.C. 201 O O R -O Mr. N. Ge o r g e T u c k e r Hulerces Industries I n c o r p o r a t e d A u g u s t 3, 1983 Page Four On this basis, s a m p l e s 1, 2, 3, 4 and 5 would meet the OSHA requirements e v e n for an extended 8 * h o u r w r k period d ^ o s u r e on either a fiber concentration or sise basis. Sample 6 would rail outside this same standard, based on an 8-hour exposure. It w o u l d also exceed the c e i l i n g v a l u e of 10 fibers. To p u t t h i s in p e r s p e c t i v e , though, it is necessary t o #in terpret the numerical data with respect to realistic happenings. Samples 5 and 6 represent uncured material obtained by vigor ously scraping dried, retained amounts on tools. This would not be a full work day circumstance- The dried material adheres very well to trowels and blades so that vigorous scraping has not removed it from those surfaces. From a practical standpoint, it would seem, based on this data, that no realistic hazard exists. The most probable pos sibility could arise from sanding the cured cement or scraping of cement deposits on tools. As a precaution, it may be useful to advise that tools be cleaned before the f*** dries and that no sanding of the dried or cured material b_ done without proper particulate mask protection. Respectfully submitted, Charles Anthony President Attachment ra CASE CONSULTING LABORATORIES, INC, Sample Number Sample Conditions Total Fiber Concentration Per ni3 Pea: oc. 1 Fully cured 3.32 x 10s 0.33 2 Fully cured 3 Partially cured 3.87 x 104 9.95 X 10* 0.39 0.10 4 Partially cured 4.21 x 105 0.42 5 Uncured 3.06 x 109 3,000 6 Uncured 2. 36 x 109 2,360 Sourcer Case Consulting Laboratories, Inc. ( \ EXHIBIT I Hercules Industries Incorporateti FIBER CONCENTRATICW COMPARISONS Fiber Concentrations Longer Iban 5 yni ______ Per cc.______ Maximiro OSHA Standards, Per cc. 8-~Hour Ceiling Nene 2 10 None 2 10 None 2 10 None 2 10 Nene 2 10 24 2 10 O CO \N3 o \ o I 'li cn T1 CO T. 05 wkW *nAJ H -^1 o )r| M M Crod l/i -vj r-J CO o Co Cn I m W o ow era so l" I a n * 4. 4* *0 T O G ho o ho 09/20/01 THU 15:36 FAX 701 237 9035 BOECHLER, P.C. THOMPSON, P.C. @203 t I O V -- - -=f Cl I" R X :< 1 : 1 H E R c: U l_ E C W M 1 C; A l_ . C: i~i R - ;7; 09/20/01 IHU 15:37 FAX 701 237 9035 BOECHLER, P.C. 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