Document n9b6BDwEB0DQL7xp8XqqqKzw1

I 20 Ashburton Place Boston, HA 0210S Subject: A. W. Chesterton Company; Testing of Packing and Gasket Materials HYGEIA INC. Project No. 5617 Ref: CHS5617/RICHARD Dear Hr. Kirby: As you had requested last week, I have prepared this preliminary report of our field sampling and analysis for airborne asbestos fiber during the removal of a valve at the A. W. Chest error. Company facility in Woburn, Massachusetts. I have outlined below the methods of air sampling and the results of filter analyses by both phase contrast and analytical transmission electron microscopy. Bulk analyses of the casket and packing products are also reported. The methods of air sampling will be illustrated with 3 5 mr. slides at the conference scheduled for next week. Beth area and personal samples were collected .using high volume pumps having volumetric flew rates in the range of 9.50 to 9.75 liters per minute. The tests were conducted on a damaged valve fitted to a Cycle therm steam generator. The item tested was a Walworth cate (main stop) valve fitted to a 6-inch pipe flange. The valve packing Chesterton Style 1722 (size 3/3 inches) and the gasket is also an A. W. Chesterton product. ' The boiler was taken out of service in July, 1935 and the packing and gasket material had dried and hardened in place. As a consequence, the..packing and gasket material had to be removed using a cold chisel and hammer. Bulk analyses were performed on one sample each of the packing and gasket materials with the following result. Packlnc Material. H327373. r?-m , Asbestos (Chrysotile)' 50%; Ocacue Phases 4 5%; v -- -- .i --_ <_ e , 2 'a , vj v*p S 41m/ *" 1" V ~ 7 6 4 .*gCs . 3-<?xr nil* Reid fVaithicn, NlA 32154 leieshone (617/ 350-4999 Fax (617) 350-1055 Richard E. Kirby, Escuire March 9, 1939 Pace Two Gasket Material. H327365. fG-lO'. Asbestos (Chrysotile) 45*; Cellulose Fiber 25*; Opaque Phases 20%. The bulk samples were analyzed by polarized light microscopy (I?A Interim Method; Appendix A to Subpart F-40 CFR Part 76 2) at magnifications ranging from lOx to 400x. The estimated phase abundances are provided in weight percent and are accurate to within 10 to 15 percent of the amount reported. This method is sensitive to the detection of asbestos to less than one percent bv weicht. Four filters were analyted using phase contrast microscopy according to the NICSH 7400*method. This is the procedure fcllcved by CSKA for workplace compliance with the remiss.ible Exposure Limit standards. The results are as follows. A background sample taken before any activity took place gave a fiber count of less than 0.01 fiber per cubic centimeter (f/cc). During gasket removal the fiber count'was 0.Qi f/cc. During packing removal the fiber count was less than 0.01 f/cc. Finally, a personal sample collected curing the whole operation_ gave a fiber count of 0.01 f/cc. Note that 0.01 f/cc is the limit of detection by this method. Accordingly, a value reported to be less than 0.01 f/cc meer.s that nc fibers were detected. This operation induced pulling the gate valve away from the flange, and the removal cf both packing and gasket materials using a cold chisel. During this "accressive" removal, some dust was released into the air. The total elapsed time for this operation was aocut 20 minutes. Four air samples were collected for analysis by analytical transmission electron microscopy (A7IM) , with the following result. A background sample drawn ever a period cf 50 minutes gave an asbestos structure count of less than 0.005' structures per cc. That is, nc asbestos fiber was found at the limit cf During pac.King removal, an asoestes count of G.G3 structures per cc was found. Durir.c casket removal, the asbestos count was -0.005 structures per co. These samples represent airborne fiber concentrations in the area adjacent to the oceraticn. A personal sample collected in tr.e breathi.nc zone cf t.he operator gave a result cf 0.025 structures per cc for the duration cf the cceraticr.. Richard B. Kirby, Esquire March 9, 1989 Pace Three. By way of explanation, ve provide the following consents. The terra "structures per cubic centimeter" includes individual fibers, fiber bundles, clusters and matrices.. Referring to the photographs, we see that the majority of asbestos-containing artifacts found were matrices. Very few single unattached asbestos fibers were found on any of the filters. We were unable to obtain selected area electron diffractie^ f^AED) patterns on the fibers because they were coated with* resin, a finding that may have medical cons'ecuences. Fiber icfer:cfixoation was cade on the basis of morphology and chemistry. The short duration of the dismantling operation mace it necessary to collect the personal samples at a higher volumetric flow rata than is normally used. Also, a far greater number of TZM grids had to be examined in order to attain the detection limit of 0.005 structures per cc. The computer printout attached provides individual measurements of the asbestos fiber matrices. The photographs, we believe, are a good representation of the structures observed (keeping in mind that there were very few of them). These filter samples were analyted following the U. S. E?A . AHZHA protocol which includes only these asbestos fibers having an aspect ratio of 5 or greater and, in addition, a minimum length of Q . 5 "'micrometers. At this ccinr/, I would suggest that the reviewers of this work examine the individual asbestos fiber dimension data given in the computer printout. Yours si.ncerelv. HYGZ2A INC. Certified Industrial Princioal Consultant -CMS/lcr E.nc. > I HYGFJAf INC. Report Date: 03/06/89 1 Page 1 Asbestos Analysis by Transmission Electron Microscopy Client Name: Richard Kirby Client Sample I.D.: 01 Sample Location: Bailer Room Background HYCEIA Project .5617 HYGEIA Batch 88 Ncv HYGEIA ID HT83-3279 01 DATA SUMMARY Sample Volume (liters): 430.0 Sample Collected by: C. Spooner Filter Type: Millipcre TZM Analyst: W. Cranton Number of Structures: 1 Grid Openings: 22 Date of Collection: 11/23/88 Filter Diameter: 25 mm. Date of Analysis: 03/03/39 Grid Opening Area (mm2): Total Grid A-ea Analyted (mn~): 0.007189 0.158153 SUMMARY OF ANALYSIS Total Structure Count (s/cc) Total Structure Count (s/mm2; Asbestos Structure Coun (s/cc'* Asbestos Structure Coun (s/mm2)* Asbestos Structure Mass (ng/mJ)* Asbestos Structure Concentratio'r. (s/cc)*......................................... for all structures greater than. 5 ^microns in length with an aspect ratio of 5.1 or greater. Analytical Sensitivity (s/co) ... .............................................. 0.005 6.323 ND NO ND ND 0.005 Includes Ambiguous Structures Ref: TEM/Formi . ;"3G3 3*ar Hill Read .Waltham, MA 02154 TeLe^one (6173 890-4999 Fax (617) 890-1058 Reocrt Dace: 03/06/59 Page 2 Asbestos Analysis by Transmission Electron Microscopy Client Name: Richard Kirby Client Sample I.D.: 01 Sample Location: Boiler Room Background HYGEIA Project #5617 HYGEIA Batch 88 Ncv 01 HYGEIA ID HT38-3279 STRUCTURE LISTING --------- Microns -- No Length wi dth Thjcness Ident Form Mass Asoect EDAX (Ricocm) Ratio SAED MG SI CA FE NA Grid #1: Grid #2: Grid #3: Grid #4: Grid #5: 1 1.653 Grid #6 Nc Structures Encountered Nc S tructures Encountered Nc S tructures Encountered Nc Structures Encountared 0 . 127 0.000 Callu. Fiber 2.10E-2 Grid #22: Nc. Structures Encountered 13 * .V HYGRIAfTNC. T Report Date: 03/06/89 Page 1 Asbestos Analysis by Transmission Electron Microscopy , Client Name: Richard Kirby Client Simple I.D.: 03 Sample Location: Gasket Removal HYGZIA Project $5617 HYGZIA Batch 88 Nov 01 HYGZIA ID HT83-3280 DATA SUMMARY Sample Volume (liters): 80.8 . Sample Collected by: C. Spooner Filter Type: Millipcre TIM Analyst: M. O'Hallcran Number c: Structures: 17 Grid Openings: 135 Date of Collection: 11/23/88 Filter Diameter: 25 mm. Date of Analysis: 03/01/89 Grid Opening Area (mm2): Total Grid Analyzed (mm2): 0.007189 0.970515 SUMMARY Or ANALYSTS Total- Structure Count (s/ccu Total Structure Count (s/mm2) 0.083 17.517 Asbestos Structure Count (s/ccl* ......................... - .................... Asbestos Structure Count (s/mn2)* ........................................................ Asbestos Structure Mass (ng/m2)*........................................................ -0.005 0.^1-> Asbestos Structure Concentration (s/cc) *......................................... for all structures greater than 5 microns in length with an aspect ratio of 5.1 or greater. Analytical Sensitivity (s/cc)....................................................................... .. 0.005 Includes Ambiguous Structures Ref: TEM/Form! " j,3C3 Sear Hill Read 'Waithani MA 02154 ..Telephone (617) 890-4999 Fax (617) 890-1053 t ^eccrt Dace: 03/OC/SS Paco Asbestos Analysis by Transmission Eleccron Microscopy riier.t Name: Richard Kirby Client Sample I.D.: 03 Sample Location: Gasket Removal HYGZIA Project 15617 HYGZIA Batch 38 Nov oi HYGZIA ID HTSS-3280 TRUC7URZ LISTING o Length Width Thjcness Ide.nt Fore Mass Aspect EDA.X (Picogm) Ratio SARD KG S i CA FE NA rid Si No Structures Zncountered red 52 : No Structures Encountered rid ?>: 2.23 0.151 0.000 Cellu Fiber 4.04Z-2 15 rid ?4 through rid 14: rid 15: 2.265 0.11S No Structures Encountered m 0.000 Cellu Fiber 2.61Z-2 1 20 ric 416: No Structures Encountered rid 17: . 0.833 0.059 0.000 Ncr.Asb Fiber 4.S2E-3 15 *ic iis through ic ?22: Nc Structures Encountered 'id 2 3 : 2.665 0.059 0.000 Cellu Fiber ' 7.34E-3' 45 i c 24: :c t 2 5 : 3.253 0.237 id s 26 through id 2S : No Structures Encountered. * 0.000 NonAsb Fiber 2.89Z-3 No Structures t* Encountered 14 Ncne . Ncn Asbestos None Non Asbestos None Ncn Asbestos - None Nor. Asbestos Non Asbestos . *91 iii i*i 1i '` i1 ! 1 --------- Microns i-c Length width Thk.ness Ident Font Mass (Picocn) Pace 3 Aspect EDAX Ratio SAED MG SI CA FZ NA Grid #29: 6 1.481 0.055 0.000 Unknvn Fiber 8.20E-3 25 Grid *30: 7 1.895 0.059 S 2.665 0.237 Grid *31: 9 5.320' 0.592 0.000 0.000 0.000 NonAsb Fiber Celiu Fiber Celiu Fiber 1.05E-2 1.17E-1 1.47E00 32 11 9 Grid *32: No Structures Enccunt Grid 422 : 10 5.350 0.118 Grid *34 tii rough Grid ni: 0.000 Celiu Fiber 5.94E-2 No Structures Encount ered 4o Grid #39: 11 2.850 0.178 0.000 NonAsb Fiber 1.9ZE-1 Grid *40: Grid #41: 12 1.777 0.113 No Structures Encount * 0.000 NonAsb Fiber 3.94E-2 3ric = 42 through ^rid ?67 : No Structures Encount,e: ed 22 15 Irid #63: 3 1.826 0.118 0.000 NonAsb Fiber 4.071-2 15 rid #69 through ric = 74: No Structures Encountered rid = Ld : ; 3.3 17 o.na 0.000 *:c =76 through ic ? 100: id 11o2 : 3.672 0.592- 0.000 NonAsb Fiber 7.351-2 23 No Structures E.ncounte rs -- NonAsb i/zFibr 2 -03E00 > 6 None Non Asbestos None Non Asbestos Non Asbestos Nor. Asbestos -* Non Asbestos Nor. Asbestos % ---------- Microns No Length Width ThJcness Ident Fora Mass (Picogm) Aspect Ratio SAED Page 4 EDAX MG SI CA 77 N'A Grid #102: IS 4.738 . 0.118 Gridm #103: Grid #104: Grid #105: 1" 3.554 0.552 Grid #106 throuch Grid #125: Ref: TZM/7cm2 0.059 0.000 Chryso Bundle 8.442-2 40 Nc Structures Encountered No Structures Encountered NcnAsb Fiber 1.97200 6 No Structures Encountered Faint 5 io o i : Ncn Asbestos J I i < f HYGB1AGINC. 1 Report Dace: 03/06/89 Page 1 . Asbestos Analysis by Transmission Electron Microscopy Client Name: Richard Kirby Client Sample I.D.: 05 Sample Location: Packing Removal HYGEIA Project 5 5617 HYGEIA Batch 83 Nov 01 HYGEIA ID HT33-32S1 DATA SUMMARY Sample Volume (1 iters): 108.1 Sample Collected by: C. Scccner Filter Type: Mi lllpcre TEM Analyst: W. Cranton Number of Struct'eras: IS Grid Openings: 95 Date of Collection: 11/23/33 Filter Diameter: 25 mm. Date of Analysis: 03/02/39 Grid Opening Area (mm2): Total Grid Area Analyzed (mm. ) : 0.007139 0.711711 SUMMARY OF ANALYSIS Total Structure Count (s/cci Total Structure Count '(s/mm2) 0.095 26.696 Asbestos Structure Count (s/cci* ........................................................ Asbestos Structure Count (s/ar. ) * .............................................................. Asbestos Structure Mass (nc/mJ)* .................................... . . . . 0.050 14.051 25.042 Asbestos Structure Concentration ( s/cc)*......................................... _ for all s tructures great er than 5 microns in length with* an aspect ra tio of 5.1. or creatar. 0.00 5 Analytical Sensitivity (s/cc) ............................................................. 0.0Q5 . Includes Ambiguous Structures Ref: TEM/Forml V 303 Bear Hill Road Waltham. MA 02!.>t . , / /A ]T1 uufuiooo r-_ _ ^eo Resert Dace: 03/06/S9 Page 3 Asbestos Analysis by Transmission Electron Microscopy Client Name: Richard Kirby Client Sample I.D.: .05 Sample Location: Packing Removal HYGEIA Project *5617 HYGEIA Batch 83 Nov 01 HYGEIA ID HT83-32S1 STRUCTURE LISTING ,, ----- -- Micr.o. ns -- No Length Width Thkness Ider.t Fora Mass Aspect EDAX (Picogm) Ratio SAID MG SI CA FI n; Grid =1 throuch Grid *6 : Grid 5 7 : 1 6. e: 0.636 No Structures Encountered 0.064 Acbicu Clump 5.175-1 Grid throuch Grid 516: No Structuras Grid *17: 3 1.006 0.084 0.000 NcnAsb Grid 118: No St:ructuras Grid ?19: 4 9.921 5.669 0.142 Unknvn Grid 520 through Grid 523: No Structures Grid 524: 5 3.135 0.233 j ric =25: 0 C 3 4 Amoigu No Structures -rid 525: 5 1.84 4 O.oa.4 3r:c ?27 throuch !rid 538: 0.000 NcnAsb No structures ^ - V. -- :rid 5 39 : 3.42C 0.168 0 . ooc Cellu. j 10 1 4. C 21 None 8 T None Nor. Asbestos None Non Asbescos None None Non AsbesbO:* None Her. Asbestc: Pace 2 --------- Microns-----------No Lencrft width ThJcness Ident Fora Mass As peer. . EDAX (Picocn) Ratio SAED MG SI CA FI NA Grid *40: 3 . 2.643 0i.110 Grid #41 through Grid *44: Grid *45: 9 4.405 3.304 0.000 Chryso Fiber 6.40E-2 No Structures Encountered 0.055 Anhicu Matrix 1.61E00 24 1 Grid *46: No Structures E.tcour.tared Grid *47: 10 9.507 0.441 0.000 Caliu Fiber 1.47E00 22 Grid *43: 11 0.716 0.110 12 1.542 0.335 0.000 0.000 NcnAsb Fiber Aacicu Fiber 1.271-2 3.62E-1 7 4 Grid *49 through Grid *51: No Structuras Ehcounts Grid *52: 13 3.194 0.325 in ion o Chryso Bundle 3.69E-1 4 Grid *53: 14. 1.211 15 1.046 15 1.156 0.055 0.110 0.055 0.000 0.055 o .too Chryso Fiber Chryso Bundle Unknvn F iber 7.33E-3 1.61E-2 5.54E-3 22 10 21 Grid 154 throuch Grid *66: / No St ructures Encount ered Grid *67: 17 2.037 0.063 0.000 Chryso Matrix 1.37E-2 30 Grid. *63 through Grid *71: No St ructure^s Encount Grid *72: 13 6.790 1.353 Srid -73' through Srrd *32: 0- 063 Chryso Matrix 1.59100 No St ructures Encount erec 5 None 6 1C 0 2 None None Non Asbesto: None Non Asbesto Anbig 2 10 3 3 . None 6 10 Faint 6 1G C Faint E lo. 1 None -* None 7 10 _0 Faint 6 10 0 Pace --------- Microns------------No Length width Thkness Ident Fora Mass Aspect EDAX (Picoga) Ratio SAED KG SI CA FI Grid i83: 19 2.444 0.136 0.000 IJnXnvn Fiber 7.12Z-2 Grid mJ84: No Structures Encountered Grid *85: 20 5.432 ' 2.716 0.063 Unknvn Fiber 2.01Z00 Grid *36 tbrouch Grid *99: No Structures Encountered 18 2 None Non Asbest None 9 10 0 1 HYGEIA?IN( Acpcrt Dace: 03/06/82 Fage 1 Asbestos Analysis "by Transmission Electron Microscopy Client Name: Richard Kirby Client Sample I.D.: 07 Sample Location: Breathing Zone during hole operations HYGEIA Project if5*SIT HYGEIA Batch 8a Ncv 01 HYGEIA ID KT33-3232 DATA SUMMARY Sample Volume (liters): 120.2 Sample Collected by: C. Scccner Filter Type: Miiiipcre TIM Analyst: w. Crar.ton Number of Structures: 11 Grid Openings: 56 Data of Collection: 11/23/33 Filter Diameter: 25 am. Date of Analysis: 02/01/32 Grid Opening Area (mm2): Total Grid Area Analysed (mm2) : 0.007132 0.402584 SUMMARY Or ANALYSIS Total Structure Count (s/ccl ................................................................. Total Structure Count (s/mm2) ................................................................. 0.05 5 27.22c Asbestos Structure Count (s/cc)* Asbestos Structure Count (s/mm2}* Asbestos Structure Mass (ng/m2)* 0.035 . 17.333' U 4 - Y27 sbestos Structure Concentration (s/cc)*......................................... or ail structures greater than 5 microns in length with an spect ratio of 5.1 or greater. 0.025 '.alyrical Sensitivity (s/ 0.005 eludes Ambiguous Structures : TEM/Forml__________________ _________________ ________________________________ '303 Bar HU! F.aad Waltham. MA 021=4 feirthone <173 22C-CW fzx (bin 3VO-1056 Report Date: 03/06/39 Page l Asbestos Analysis by Transmission Electron Microscopy Client Name: Richard Kirby Client Sample I.D.: 07 Sample Location: Breathing Zone during hole ooerations HYGZIA Project' #5617 HYGEIA Batch 88 Nov 01 HYGEIA ID HT33-3282 STRUCTURE LISTING --------- Microns-----------No Length width ThJcness Ider.t Fort Mass Aspect EDAX (Picccr.) Ratio SAID MG SI CA FE t'.A Grid #1: No Structures Encountered Grid t _: Me Structures Encountered Grid #3: 1 1.5J4 0.151 0.000 Cailu Fiber 2.33E-2 11 None Grid 14: No Structures Encount ered Grid #5: Nc Structures Encount ered Grid *5: Grid 2 7:. 2 3.017 0.377 No Structures Encount ered 0.075 Chrysc Bundle 2.18E-1 8 Fa int 7 10 l 1 0 Grid # 8: 3 9.805 2.263 0 .'075 Chrvso Cluno 4.25E00 4 Faint 8 10 1 3 c 'Grid #9: < 3.296 0.151 0.000 Cellu Fiber 1.4SZ-1 Grid #10 55 5.279 0.226 0.000 Cellu Fiber 2.12E-1 --1 J A- - No S cruccures Encountered 55 23 None. None Grid si2: Grid ;13: , 6 5.759 5.759 0.096 Chr/so Matrix a.09EGG Grid #14 through Grid #19: r Nc Structures Encountered .1 * None 5 10 0 'O f l ----------Mi crons No Length width Thkness Ident Fort> Mass (Riccgm) Asoect Ratio SAED Page : EDAX MG SI CA FE NA Grid #20 7 10.553 1.440 Grid'#21 through Grid if 39 : 0.000 NonAsb Fiber 3.45E01 No Structures Enccunt 7 None Non Asbestos Grid ,40: 8 3.642 6.025 Grid #41 through Grid #42: 0.121 Chrysc Matrix 1.73E01 No Structures C w 2 None 6 10 0 2 0 Grid #44: 9 43.753 0.430 10 9.113 0.960 11 4.79c 0.763 0.043. Chrysc Bundle 0.043 Chryso Bundle 0.043 Asoigu Matrix 2.85E00 1-07i00 3.55E-1 102 10 6 Faint 8 10 0 1 ' 0 None 8 10 0 1 0 None Grid #45 thrsuch Grid #56: No Structures Ehcount ered i i t i i I i 1 I f