Document bBMVXBaMO1npqepb9JjyvDKdO

FILE NAME: Asbestos Cement Pipe and Sheet (ACPS) DATE: DOC#: ACPS0 DOCUMENT DESCRIPTION: hZZZ'Z W GRINDING ASBESTOS CEMENT PIPE WORK PRACTICE SIMULATION DEMONSTRATION 'Prepared by: Richard L. Hatfield Willial'T\ E. Longo, Ph. o_ Materials Analytical Services, Inc. ;h Office: .uttol'I Street Suite IOI .;h. NC :?7606 . 5:!9-7041 F,._,"( /919\ l!2'i'-55li: Atlanu Office: l~.\5 Lakene(d Court Suwanee, Gtorsi 300:?4 ,-n, 'M.h.,~r"-t'l .. ::.1._x i~;,, ~;..:..~:.t;.)  ;i;-6 Protocol & Summary of Data .. - PCM, TEM & Fabric Analysis 1 .,. . . Bulk Sample Analysis ' . 2 'f.,;, Air Sample Results 3 ' Fabric 5 "1ple Results . 4 . 5.. ~ W!lsonJo~es. MulLiDe:rBasic \ \ Protocol for Work-practice Simulation of Grinding Asbestos Cement Pipe This study was designed and conducted by Richard Hatfield, William Longo and ~herman Lee Phillips Study Design and Methodology ,,. The study was performed in an isolati~n chamber constructed using typical asbestos . abatement protocols. The size of the chamber is approximatefy 1sx 20'x 8'. The --chamber. is constructed with two viewing windows for video taping purposes and has an air exchange rate of appoximatily100 cubic feet per minute with two primary inlet sources and a negative air machine that produces a constant flow during the workplace study. After the study, the inside of the chamber was decontaminated by s~andard asbestos. decontamination methods including HEPA yacuuming of all dust and debris and wet. wiping of all surfaces. During ~ideo taping of the work practice study, lighting is utilized inside the chamber to enhance the possible observation~ of dust release during the work practice. Previous studies have shown that the use of, what is commonly referred to, as the MTyndall light phenomena" is an effective method of displaying respirable airborne dust generated } from work'place actives. Materials Analytical Services (MAS) were provided with some Capco manufactured asbestos cement pipe by Mr. Sherman Phillips. A sample of the pipe was analyzed by Polarized Light Microscopy {PLM) and confirmed Chrysotile and Crocidolite asbestos was present in the pipe. During the study, air samples were collected using 25mm air cassettes containing 0.8 micron pore mixed cellulose ester (MCE) filters and a 5.0 micron backing pad. The air sampling pumps were calibrated both before and after the sample collection. High volume pumps were used for area or bystander air samples during the simulation. The pumps were located outside the chamber a.nd connected to the air sample cassettes by Tygon tubing through the walls of the chamber. The two area air samples were located - on opposite ends of the chamber.. -The air sampling cassettes. were . located approximately five feet from the floor and 6 to 8 feet from the work activity. The high volume .pumps were calibrated to a flow rate of 10 liters per minute. The two investigators performing the work place simulation were each fitted with two personnel air samplers attached to the left and right shoulder area to sample in the breathing zone the asbestos exposures during the work place simulations. The personnel air samples ~ were collected with battery operated Gillian pumps, calibrated to a flow rate of 2 liters per minute. Before each work place simulation, background samples were run both inside and outside the chamber. The air samples were collected in general accordance with methods outlined in NIOSH's 582 "Sampling and Evaluating Airborne Asbestos Oust". wore i"he individuals working inside the chamber Tyvek suits under cotton/polyester work cfoths and were protected with Self-Contained Breathing Apparatus (SCBA}. The chamber design Included 'decontamination-areas for clothing removal and for a shower to remove any residual asbestos contamination before the workers left the chamber area The work practice used in this study was the grinding of imperfections from the inside ends of an asbestos cement pipe. For this study a former employee of Capco, Mr..Sherrnan Phillips. was asked to perform the work activities just as he did on the job. Mr. Phillips also provided some information about his on the job experiences grinding these - pipes. During this discussions Mr. Phillips stated the following: Worked at capco Plant'located in Ragland, Alabama for 7 years as-a lath operator on the finishing side. He was trained by Capco and worked there from 1968 to 1975. Mr. Phillips estimates that he ground th,ousands of pipe ends. Mr. Phillips-stated.he.ground pipes, which were stacked in .groups of 15 to 40 pipes per pallet depending on their diametrtr. Apprexirnate!y one out of three required grinding. Daily production of pipe was approximately 100 to 600 per shift per day. He stated that whlle he was grinding at one end of the pipes; another worker was grinding at the other ends. To simulate the grinding activity, Mr. Phillips, utllized ~n lngersoll~Rand Series 61 H horizontal air grinder {model 61H120L6), which has a free speed of 12,000 rpm . The grinder was powered by 90 psi. compressed air at a maximum flow rate of 1Ocu. ft. per minute. The sampling and work time for the study was approximately 12 minutes in length. After the completion of the work place simulation, swatch samples of the work clothing were taken and analyzed by the Chatfield method to determine the level of asbestos contamination in the clothing. The filters were analyzed by the NIOSH 7400 method for PCM using A counting rules. For TEM analysis, a modified Yamate EPA level It indirect air sample analysis was performed.'Tn~fsamplesfor TEM analysis were prepared using a redeposit method.as detailed in the ASTM method 0-5595. The dust collected on the filter is washed from the cassecte and filter using a. 50-50_ mi?(ture of de-ionized water and alcohol. The suspension is mixed using an ultra-sounp water bath to produce a homogeneous suspension. An aliquot of the suspension is redeposit onto a new filter. -:.. Upon completion of the workplace simulation st1:Jdy, the chc;.mber was completely decontaminated to remove the asbestos containing dust. The b[ack cloth sheeting on the inside surfaces of the chamber was removed and disposed. All surfaces were HEPA vacuumed and wet wiped according to standard asbestos abatement technology. 2  GRINDING OF ASBESTOS CEMENT PIPE ASBESTOS AIR AND FABRIC ANALYSIS RES ULTS Sample# I-I-A 1-1-8 11-1-A ll-l-8 111-1-A 111-1-B 111-l~C 1 111-1-D Sample Description PCM Fibers/cc !WA Background 0.10 IWA Background 0.05 IWA Area Sample lWA Area Sample 294.00 207.00 IWA SLPR .Personnel 254 !WA SLPL Personnel 200 !WA RLHR Personnel 227 IWA RLHL Personnel 293 TEM _(All) TEM Strfcc Fibers > Sum/cc < 0.02 NIA < 0.02 NIA 3188 3244 . 5925 1802 7618 3133 1175 1663 423 277 1270 975 . Structureslsq ft. . IV-1-A-SLP Clothing Fabric IV-1-8-RLH. Clothing Fabric 9.4 billion 17.2 !;Jillian SLP - Sherman lee PhilHps Structures/cm2 10. 1 million .. - 18.5 million MATERIALS ANALYrlCAL SERVICES. INC. PLM ANALYSIS . Proj#-Splf: M20774-001 Analy:;t: ClientName; Environmental Utigation Group Location: Type_Mat: 8' Cement Asbestos Pipe W.B. E;geland ClientSpl: Date: 12/21/98 -#1 - - - - - - - - Gross Ug~t gray. Cementitious with abundant blue and white fiber bundles throughout. Six inch diameter Visual: pipe with 518th Inch thickness. OPTICAL OATA FOR ASBESTOS IDENTIFICATION Morphology Pleochrofsm Refract Index. Sign Extinction BirefringeMnecelt Fiber Name WaV'f _N_o_n_a_ _ _ _ _ __ - - - - - - - - - 1.555/1.548 + -P-ara-ll_ el _ _ _ _ __ _____ _lNo_ow_______ _C.h.,r_y_so_b_1,;e Straight Blue/Gray 1.69511.705 Parallel Mod. No Crocidofile ASBESTOS MINERALS EST. VOL lo Chrysotlle....."..................._....-........_._. 16 A m a s l t e -..........,._ _ _,._................. Crocldolite-_ _ _ _ _ _,.__, , ~ -...... 7 Tremollte//\ctinolite........._..."-- Anthophylllte,...- -,...........- ...,. OTHER FIBROUS COMPONENTS NON FIBROUS COMPONENTS Cement 75 -------- Effervescence: Strong. Binder Description: Carbonate and fine:9rained aggregale Comments: No starch observed