Strength Laboratory University in Rio

Transcription

1 N : Date: 07/10/11 Client: Project: Real Case - Occupational Noise Exposure and Report with NoiseAtWork Edition: 1 Environmental Mapping and Noise Exposure Estimation Review: 1 I Appraiser: Rogério Dias Regazzi Place: Rio de Janeiro - RJ 1 of 13 A) INTRODUCTION This is a real case study using NoiseAtWork as a Method and Tool to improve the reports for the Safety and health working conditions to preserve human capacity. In this document, we are showing reports with occupational safety and health standards and describing exposure concentrations that are safe for different periods of employment, according to any law of every country, due to the generic formula in the software. By means of criteria documents, NIOSH communicates recommended standards to Regulatory Agencies (including the Occupational Safety and Health Administration [OSHA]) and to others in the occupational safety and health community. The method may be used by auditors that will evaluate noise exposure in working conditions, including naval and offshore activities. B) EXECUTIVE SUMMARY For the present work we performed an executive summary and a Noise Exposure Monitoring and Environmental Mapping Report meeting the requirements of environmental statements for the Environmental Hazards in Workplace in accordance with local regulatory requirements established by Ministry of Social Welfare and Ministry of Employment and Work (MPAS and MTE). In addition to meet the internal parameters of the Health and Safety at Work Department at the University (HSEC). Environmental assessments of Sound Pressure Levels (SPL) meet the Noise Management Program, Hearing Conservation Program and the Noise Control Plan at the source of the company/institution. Usually called Hearing Loss Protection Program (HLPP). The occupational environmental assessments were divided into additional shares related to measurement, evaluation and simulation (using the software NoiseAtWork) of the occupational exposure of employees of the Mechanical Testing Laboratory - LEM during specific activities and/or working hours, making Homogeneous Exposure Group(s) provided by activities of higher exposure risk (HER) from the mapping the sound pressure Level and frequency of critical sources for characterization and calculation efficiency of PPE along the NIOSH method with 98% reliability. The exposure values with and without PPE is provided following the criteria and rates of return of the Standard NHO-01 FUNDACENTRO, being more conservative. In the characterization of sources and critical evaluation of control measures, it was used a sound pressure level analyzer that provides real-time data by octaves of frequency, allowing the use of NIOSH-0, long method to evaluate the actual attenuation of PPE/HPD/PPE and characterization of different situations in the higher exposure risk, providing the premises for a control plan and mitigation of the company, which can understand the engineering controls project to mitigate the high SPL at the highest sources. Therefore, the results of sampling and measurements will be presented in tables meeting the regulations and methods of exposure assessment for Sporadic and Customary activities; characteristic of Testing Laboratories in Universities. As a reposted from noise dosimeter using the same formula we simulated with NoiseAtWork occupational work processes in the environment and at the more critical situation, informing the exposure level of the day and the corresponding dose that was detected below % in the more critical usual activities (less than action Limit). So there is no overcoming of the global average levels normalized as Lex, 8h or TWA for q = 3 and q=5 attended all Brazilians criterion. Concluding that average normalized level (TWA,8 /TWA,x) at the biggest risk situation did not exceed 82 db (A) for q=3 and for q=5. However, maximum levels (Lmax) above db (A) / db (Lin) at the time of rupture of the specimen during the test of tons, creates a grave or imminent risk within a radius of more 1 meter from the source if not used PPE. During the 20 tons test, values exceed This report applies to all activities in the Mechanical Testing Laboratory at the University PUC- Rio and corresponds to the Technical Report Environmental Working Conditions, that is, the environmental evidence regarding the risks of occupational noise exposure of employees and students. So, the previous Audio-dosimetry combined with the new environmental assessments AS INFORMAÇÕES DESTE DOCUMENTO SÃO PROPRIEDADE DA EMPRESA, SENDO PROIBIDA A UTILIZAÇÃO FORA DA SUA FINALIDADE.

2 2 of 13 will complement the Auditory Program Control, proposed by a critical analysis of the measured values, identified main sources, legal standards of the Exhibition according to NHO-01 FUNDACENTRO, parameterization rules, proof of current control measures with 98% reliability in order to ensure adequate protection of employees, contractors and students. In evaluations were applied a more restrictive criteria, also procedures and processes of most reliable calculation of measures to control noise to neutralize the noise agent. Therefore, we performed calculations of efficiency of PPE / HPD with the measurement data by octave frequencies of critical sources and mitigations using the data from the CA - Approval Guard Certificate of PPE and the Long NIOSH Method 01 with a reliability of 98%. C) INTRODUCTION This report is part of the environmental control program at a University in Rio de Janeiro and is in accordance with the policy of sustainability and social responsibility promoted by the University with respect to legislation and society. It was designed to meet the requirements of Occupational and Environmental Laws existing in respect to exposure control of employees, staff and students in activities at the laboratories. It was requested by the Health, Safety and Environment University Department (HSEC) in accordance to the environmental risks management program. The works were developed in order to serve the University needs that come from the information at the environmental risks management program, from the Environmental Reports, conditions and historical past, and also meeting the demands and formats for the environmental evidences in response to enforcement and legal proceedings. Therefore comprise a method for verification and / or neutralization of noise exposure in the past and present conditions. C) RESULTS OF ENVIRONMENTAL ASSESSMENTS (Sound Pressure Level) Dates, responsible, methodologies, procedures, data, graphs and frequency results with and without-weighted to the noise agent will be present in the body of the report and attached are the measurements historical as required by the legislator. It is presented in all assessments the 1/1 octave with (A) weighted values graph, providing the technical premises for possible control measures of the critical frequencies for use of PPE or Engineer Control to neutralize the agent noise. This report presents the results for the following measurements and control measures for employees at the Laboratory of Strength: Physical Agent Occupational Noise: 1) Audio dosimetry of sound pressure level: We performed noise measurements and the estimated length of stay in jobs with a view to seasonality and the various processes of the Laboratory of Strength. Therefore, we defined (03) critical cases to the high pressure level exposure situation in the condition (EMR - Higher Risk of Exposure), and using the software NoiseAtWork to calculate and estimate the dose and the equivalent standard level: 1.a) GHE/GES LF-1 - Teacher/ Laboratory of Strength /Usual; 1.b) GHE/GES LF-2H - Technique/ Laboratory of Strength /Usual; 1.c) GHE/GES LF-2E Technique/ Laboratory of Strength /Eventual; 2) Mapping with sound pressure level analyzer to identify the main sources of occupational noise present in the workplace or activity, evaluation of the effectiveness of PPE using the long method of NIOSH, that allows a reliability of 98% in the neutralization of the agent and the efficiency of recognition control measures due to the emission source and criteria for isolation of the area, allowing the application of administrative and operational procedures for working near the sources. C.1. Octave Mapping of Environmental Sound Pressure Level (Noise Survey) Surveys of sound pressure levels by octaves have the following purposes:

3 3 of 13 Make the contour or mapping of the occupational noise to identify and alert the staff and employees of the areas or activities at risk of high sound pressure levels exposure; Characterize a noise source in order determine which are the necessary engineering controls measures and / or the choice for hearing protection devices; Evaluate the actual attenuation of PPE in accordance with the data measured directly from the source at the worse condition; Allow the choice of a PPE that best suits the activity using the long method of NIOSH (actual noise /98% reliability); Allows to evaluate the intelligibility of the environment and efficiency of the company's audible alarms; Estimate worker exposure trought administrative control of exposure time on the activity of occupational risk; Complement and audit the audio-dosimetry of the working day; Complement the HLPP - Hearing Conservation Program of the company; Establish procedures for registration in Forms of Field Surveys as monitoring of complementary control to occupational environmental statements. Therefore, measurements were made with special frequency analyzer in real time that has allowed to identify and analyze the characteristics of the main sources and the effective attenuation of PPE used by the company in the questions of, impact of noise, individual and collective control enabling act effectively in propagation / transmission of sound waves. C.2. Measurements and Environmental Assessments Results: The results are presented in graphs and tables that integrates themselves where the mean value of sound pressure overall level (Leq) and by octaves are then inserted into the software NoiseAtWork, in situations encountered and focused on environmental conditions at the Greatest Exposure Risk. The studies are presented from the simulation of the maximum time in the activity or test performed, where they are calculated with great accuracy: the TWA and the exposure dose of the day: DOCUMENT GHE Sector Functions Evolved GHE/GES LF-1 Ref. Item: C.2.A-a GHE/GES LF-2H Ref. Item: C.2.A-b GHE/GES LF-2E Ref. Item: C.2.A-a Teacher/ Laboratory of Strength /Usual Technique/ Laboratory of Strength /Usual Impact Font: Tons Test. Technique/ Laboratory of Strength /Eventual Impact Font: 20 Tons Test. Teacher, Laboratory Manager and Researchers Technique and Employees Technique and Laboratory Manager Middle Exposure Level of the Work Journey TWA (8 hours) in function of: q and Thr q=5, q=3, 82 q=3, NA q=5, q=3, 82 q=3, NA q=5, q=3, 82 q=3, NA Note: GHE - Homogeneous Exposure Group; GES - Similar Exposure Group <,0 <,3,3 < 77,1 < 77,9 77,9 < 77,3 < 82,0 82,0 Tolerance and Action Level in ( hours per week),0 e,0,0 e 82,0,0 e 82,0,0 e,0,0 e 82,0,0 e 82,0,0 e,0,0 e 82,0,0 e 82,0 TWA with PPE for 95% of the Work Journey and 5% without PPE >,0 / >,0 / >,0 / >,0 / >,0 / >,0 / >,0 / >,0 / >,0 / Lmax / Nível RMS máximo em db(lin) 115,5 / 116,4 db(lin) rms 121,8 / 122,3 db(lin) rms 115,5 / 116,4 db(lin) rms The method uses room acoustic criteria allowing to obtain the background noise and intelligibility level using the Ln(s) by octaves of frequency.

4 4 of 13 The L, for example, is the equivalent sound pressure level where fifty percent of the noise is above this value. Like the L is the background noise of the environment during the activity. The analyzer "Solo" with the software dbtrait (01 db Metravib) allows the analysis of octaves with great accuracy of the environment analysis. Values are presented below in detail from punctual measurements and the environment analysis. Sketch:

5 5 of 13 GRAPHICS OF SOUND PRESSURE LEVELS IN OCTAVES AND STATICAL VALUES - Background Noise (BN) obtained from environments analyses (Perf). Perf 1A - Traction test operation - tons / Without breaking the sample Leq = 77,2 / RF = 74,8 #134 [Média] 1 khz 73.3 db () A* 77.2 Perf 1B Operation Tensile tests - tons Leq = 88,5 / Lmax = 121,8 / RF =,1 #134 [Média] 0 Hz 79.2 db () A* k 2 k 4 k 8 k 16 k Lin* A* C* NR #134 Leq 20ms A 08/07/11 16:08:46:920 77,2 db 0h04m03s5 SEL 101,1 db #134 Leq 20ms Lin 08/07/11 16:08:46:920 79,3 db 0h04m03s5 SEL 103,2 db h09 16h10 16h11 16h12 16h k 2 k 4 k 8 k 16 k Lin* A* C* NR #134 Leq 20ms A 08/07/11 16:08:46:6 88,6 db 0h04m18s0 SEL 112,7 db #134 Leq 20ms Lin 08/07/11 16:08:46:6 89,1 db 0h04m18s0 SEL 113,2 db h09 16h10 16h11 16h12 16h13 Laboratorio_Forca001.CMG Início 08/07/11 16:08:46:000 Fim 08/07/11 16:13:06:5 Canal Tipo Peso Unidade Leq Lmin Lmax L95 L L L L30 L10 L5 #134 Leq A db 88,5 72,3 121,8 74,8,1,8 76,3 76,9 78,2 79,9 #134 Leq Lin db 89,1 74,2 122,3 76,5 76,9 77,6 78,2 78,8,9 82,9 #134 Oit 63Hz Lin db 69,7 42,4 102,4,8 52,0 54,4 56,1 57,7,7 64,2 #134 Oit 125Hz Lin db 74,1 58,3 105,3 66,1 66,9 68,4 69,3,2 71,6 72,7 #134 Oit 2Hz Lin db 78,9 57,2 113,8 63,9,1 67,4 68,9,3 72,3 73,6 #134 Oit 0Hz Lin db 79,2,6 113,6 64,7,4 67,0 68,1 69,6 74,8 78,3 #134 Oit 1kHz Lin db 83,1 63,7 118,5 68,7 69,5 71,2 72,3 73,5,1 76,0 #134 Oit 2kHz Lin db 82,3 64,7 115,5 67,5 68,0 68,9 69,6,3 71,4 72,0 #134 Oit 4kHz Lin db 81,3 63,2 114,2 66,2 66,6 67,3 67,8 68,3 69,2 69,7 #134 Oit 8kHz Lin db 79,0 52,2 114,1 54,3 54,7,4 56,0 56,6 57,5 58,0 Perf 2 - In the laboratory room next to the hydraulic servo pump - Closed Door Leq = 84,5 / Lmax = 89,6 / RF = 82,5 #134 [Média] 2 khz 78.8 db () A* k 2 k 4 k 8 k 16 k Lin* A* C* NR #134 Leq 20ms A 08/07/11 16:16:18:120 84,5 db 0h00m18s6 SEL 97,2 db #134 Leq 20ms Lin 08/07/11 16:16:18:120 84,8 db 0h00m18s6 SEL 97,5 db 95 Perf 3 Servo hydraulic pump room - Open Door Leq = 102,0 / Lmax = 104,6 / RF =,9 #134 [Média] 4 khz 97.7 db () k 2 k 4 k 8 k 16 k Lin* A* C* NR #134 Leq 20ms A 08/07/11 16:17:03:0 102,0 db 0h00m19s8 SEL 115,0 db #134 Leq 20ms Lin 08/07/11 16:17:03:0 101,5 db 0h00m19s8 SEL 114,5 db 105 A* m18 16m20 16m22 16m24 16m26 16m28 16m30 16m32 16m34 16m36 Laboratorio_Forca002.CMG Início 08/07/11 16:16:18:000 Fim 08/07/11 16:20:38:5 Canal Tipo Peso Unidade Leq Lmin Lmax L95 L L L L30 L10 L5 #134 Leq A db 84,5,0 89,6 81,8 82,5 83,6 84,4 84,9,8 86,3 #134 Leq Lin db 84,8,6,3 82,1 82,7 83,8 84,4,1 86,2 86,7 #134 Oit 63Hz Lin db 63,5,9 74,2 56,9 58,0,4 62,4 64,1 66,1 67,3 #134 Oit 125Hz Lin db 68,7 58,8 76,0 62,1 63,3 66,0 67,9 69,5 71,4 72,2 #134 Oit 2Hz Lin db 73,1 62,1 84,3 66,2 67,4 69,9 71,8 73,4 76,0 77,4 #134 Oit 0Hz Lin db 76,4 67,2 88,1,1,9 72,5 74,1,9 79,1,9 #134 Oit 1kHz Lin db 78,2 67,8 88,7 72,8 73,8 76,2 77,6 78,7,2 81,2 #134 Oit 2kHz Lin db 78,8 74,0 82,8 76,0 76,6 77,7 78,5 79,2,4 81,0 #134 Oit 4kHz Lin db 78,2 73,6 82,3,2,7 76,8 78,0 78,9 79,8,3 #134 Oit 8kHz Lin db 66,9 61,7 72,1 63,4 63,9,7 66,6 67,5 68,4 68, m04 17m06 17m08 17m10 17m12 17m14 17m16 17m18 17m20 17m22 Laboratorio_Forca003.CMG Início 08/07/11 16:17:03:000 Fim 08/07/11 16:21:23:5 Canal Tipo Peso Unidade Leq Lmin Lmax L95 L L L L30 L10 L5 #134 Leq A db 102,0 99,1 104,6,5,9 101,6 101,9 102,2 102,8 103,0 #134 Leq Lin db 101,5 98,7 104,3,0,4 101,0 101,3 101,6 102,2 102,5 #134 Oit 63Hz Lin db,7 61,0 83,0 68,5 69,7 72,6 74,6 76,2 78,8 79,8 #134 Oit 125Hz Lin db 78,9 68,4,2 74,3,2 77,1 78,3 79,5 81,1 81,8 #134 Oit 2Hz Lin db,9 76,6 91,7 82,1 83,0 84,4,4 86,3 87,6 88,4 #134 Oit 0Hz Lin db 88,6 83,0 95,5,3,9 86,9 87,7 88,5,2 92,1 #134 Oit 1kHz Lin db 94,1,9 98,1,1,6 93,5 94,3 94,7 95,3 95,6 #134 Oit 2kHz Lin db 95,7 92,0 99,3 93,5 94,0 95,0 95,5 96,1 96,9 97,3 #134 Oit 4kHz Lin db 97,7 94,4 101,1 95,9 96,2 96,9 97,4 97,9 98,9 99,3 #134 Oit 8kHz Lin db 87,2 83,9,6,3,7 86,4 87,0 87,5 88,2 88,6

6 6 of 13 Perf 4 - Environment Inventory Standards Leq = 79,5 / Lmax = 87,3 / RF = 76,6 #134 [Média] 0 Hz 76.7 db () A* k 2 k 4 k 8 k 16 k Lin* A* C* NR #134 Leq 20ms A 08/07/11 16:17::020 79,5 db 0h00m14s000 SEL,9 db #134 Leq 20ms Lin 08/07/11 16:17::020 82,0 db 0h00m14s000 SEL 93,5 db 17m46 17m48 17m 17m52 17m54 17m56 17m58 Laboratorio_Forca004.CMG Início 08/07/11 16:17::000 Fim 08/07/11 16:17:59:0 Canal Tipo Peso Unidade Leq Lmin Lmax L95 L L L L30 L10 L5 #134 Leq A db 79,5 74,7 87,3 76,1 76,6 77,5 78,3 79,5 81,5 82,7 #134 Leq Lin db 82,0 76,2 89,6 78,0 78,7,2 81,2 82,2 84,0,2 #134 Oit 63Hz Lin db 61,8 44,2 78,1 53,1 54,6 57,5 59,6 61,2 63,7,0 #134 Oit 125Hz Lin db,4 57,5 81,8 62,8 64,5 69,9,3 76,9 78,1 79,2 #134 Oit 2Hz Lin db,3 58,3 79,7 63,7 64,6 66,8 68,2 69,9 73,4 74,8 #134 Oit 0Hz Lin db 76,7 64,5 89,0 67,9 68,8 71,4 73,7,9,0 82,2 #134 Oit 1kHz Lin db 73,5 64,2 82,7 67,5 68,2,0 71,7 73,6 76,7 77,8 #134 Oit 2kHz Lin db 72,4 66,8 81,5 68,7 69,4,8 71,6 72,6 74,2 74,9 #134 Oit 4kHz Lin db 71,3 67,1,4 68,9 69,4,4 71,1 71,8 72,6 73,1 #134 Oit 8kHz Lin db 58,3 54,4 63,9,7 56,1 57,2 57,9 58,6 59,7,3 Perf 5 Environment Lathe Leq = 79,4 / Lmax = 93,0 / RF = 76,0 #134 [Média] 0 Hz 76.6 db () A* k 2 k 4 k 8 k 16 k Lin* A* C* NR #134 Leq 20ms A 08/07/11 16:20:18:200 79,4 db 0h00m31s300 SEL 94,4 db #134 Leq 20ms Lin 08/07/11 16:20:18:200 82,1 db 0h00m31s300 SEL 97,0 db 95 20m20 20m25 20m30 20m35 20m 20m Laboratorio_Forca005.CMG Início 08/07/11 16:20:18:000 Fim 08/07/11 16:20:49:8 Canal Tipo Peso Unidade Leq Lmin Lmax L95 L L L L30 L10 L5 #134 Leq A db 79,4 74,0 93,0,6 76,0 76,8 77,5 78,5 81,2 83,1 #134 Leq Lin db 82,0,2 94,4 77,5 78,0 79,0 79,8,9 83,9 86,0 #134 Oit 63Hz Lin db 64,9 49,0,7 56,0 57,4,4 62,1 63,8 66,9 69,3 #134 Oit 125Hz Lin db 71,4 54,2 87,8 61,0 62,6 66,4 68,9 71,1 73,9 76,3 #134 Oit 2Hz Lin db 73,3 62,0 86,7 66,5 67,8,3 71,7 73,4 76,3 77,5 #134 Oit 0Hz Lin db 76,6 63,5 92,0 67,2 68,1 69,9 71,5 73,7 78,8 82,2 #134 Oit 1kHz Lin db,0 64,9 91,1 69,0 69,7 71,3 72,8 74,4 76,9 78,2 #134 Oit 2kHz Lin db 71,8 66,3 82,7 68,9 69,3,3,9 71,6 73,1 74,5 #134 Oit 4kHz Lin db 69,4,3 81,5 66,5 66,9 67,7 68,5 69,4,9 71,7 #134 Oit 8kHz Lin db 58,9 53,9 76,2,6,9 56,9 57,6 58,4,0,8 Perf 6 Background noise environment typical of servo hydraulic pump connected Leq = 79,0 / Lmax = 84,8 / RF = 77,8 #134 [Média] 1 khz 76.0 db () A* k 2 k 4 k 8 k 16 k Lin* A* C* NR #134 Leq 20ms A 08/07/11 16:22:14: 79,0 db 0h00m16s6 SEL 91,2 db #134 Leq 20ms Lin 08/07/11 16:22:14:,2 db 0h00m16s6 SEL 92,5 db 22m14 22m16 22m18 22m20 22m22 22m24 22m26 22m28 22m30 Laboratorio_Forca006.CMG Início 08/07/11 16:22:14:000 Fim 08/07/11 16:22:30:9 Canal Tipo Peso Unidade Leq Lmin Lmax L95 L L L L30 L10 L5 #134 Leq A db 79,0 76,8 84,8 77,5 77,8 78,3 78,6 79,0 79,8,7 #134 Leq Lin db,3 77,7 86,3 78,4 78,8 79,3 79,8,2 81,2 82,6 #134 Oit 63Hz Lin db 58,7 38,7 73,5 49,8 51,1 53,9,6 57,2,6 62,8 #134 Oit 125Hz Lin db 68,7 61,0 76,8 64,4,5 66,9 67,9 68,8,5 71,3 #134 Oit 2Hz Lin db 71,4 62,5 77,5 66,8 67,6 69,5,7 71,8 73,6 74,3 #134 Oit 0Hz Lin db 71,8 61,4 84,1,5 66,3 67,8 68,9,3 73,1 77,0 #134 Oit 1kHz Lin db 76,0 72,2,3 73,5 73,9,1,8 76,4 77,4 77,8 #134 Oit 2kHz Lin db 72,6 69,6,7,6 71,0 71,8 72,4 73,0 73,7 74,0 #134 Oit 4kHz Lin db 69,1 66,7 71,7 67,5 67,8 68,5 68,9 69,3 69,9,2 #134 Oit 8kHz Lin db 57,6 54,6,9,7 56,1 56,8 57,2 57,7 58,5 59,1 Perf 7 - Test with the Traction machine - 20 tons Leq =,9 / Lmax = 115,5 / RF =,8 #134 [Média] 0 Hz 74.7 db () 30 A* k 2 k 4 k 8 k 16 k Lin* A* C* NR #134 Leq 20ms A 08/07/11 16:29:27:820 81,0 db 0h02m58s7 SEL 103,5 db #134 Leq 20ms Lin 08/07/11 16:29:27:820 82,4 db 0h02m58s7 SEL 105,0 db h30 16h31 16h32 Laboratorio_Forca007.CMG Início 08/07/11 16:29:27:000 Fim 08/07/11 16:32:27:920 Canal Tipo Peso Unidade Leq Lmin Lmax L95 L L L L30 L10 L5 #134 Leq A db,9 56,3 115,5 64,9,8 67,6 68,8 69,9 72,5 73,6 #134 Leq Lin db 82,4 62,9 116,4 71,9 72,6 73,9 74,8,8 78,0 79,2 #134 Oit 63Hz Lin db 67,0,1 97,3 47,0 48,5 51,5 53,5,6 59,7 64,8 #134 Oit 125Hz Lin db 71,9 53,3 104,3,5 66,5 67,8 68,6 69,3,7 71,8 #134 Oit 2Hz Lin db 71,4 48,1 106,5 58,7 59,7 61,7 63,2 64,8 67,8 69,7 #134 Oit 0Hz Lin db 74,6 49,8 104,9,9 67,2 69,7 71,1 72,4,0 76,3 #134 Oit 1kHz Lin db 68,8 47,8 104,7,3 56,1 57,7 58,8,1 63,1,3 #134 Oit 2kHz Lin db 74,3 49,1 109,4 52,0 52,4 53,4 54,0 54,9 58,1 61,1 #134 Oit 4kHz Lin db,7,2,4 49,5 49,9,6 51,2 51,9 54,0 56,5 #134 Oit 8kHz Lin db 73,6 36,3 107,1 43,2 43,6 44,4 44,8,3 46,3 47,5

7 7 of 13 Perf 8 - Background noise environment typical of servo hydraulic pump off Leq = 62,1 / Lmax = 72,7 / RF = 57,8 #134 [Média] 31.5 Hz 66.0 db () 30 A* k 2 k 4 k 8 k 16 k Lin* A* C* NR #134 Leq 20ms A 08/07/11 16:33:46:0 62,2 db 0h00m22s320 SEL,7 db #134 Leq 20ms Lin 08/07/11 16:33:46:0 72,9 db 0h00m22s320 SEL 86,3 db 33m46 33m48 33m 33m52 33m54 33m56 33m58 34m00 34m02 34m04 34m06 34m08 Laboratorio_Forca008.CMG Início 08/07/11 16:33:46:000 Fim 08/07/11 16:34:08:6 Canal Tipo Peso Unidade Leq Lmin Lmax L95 L L L L30 L10 L5 #134 Leq A db 62,1,1 72,7 57,1 57,8 59,2,3 61,3 64,0 66,9 #134 Leq Lin db 72,9 62,3 84,0 66,3 67,3 69,4 71,0 72,8,6 77,1 #134 Oit 63Hz Lin db 63,7,9 79,6 48,6,6 54,4 57,2,7 67,0 69,2 #134 Oit 125Hz Lin db,2 48,3 77,0 56,1 57,8 62,5 64,4 66,0 67,7 68,6 #134 Oit 2Hz Lin db 62,3 49,9 73,5,4 56,6 59,1,9 62,6,1 66,2 #134 Oit 0Hz Lin db,8 48,8,7 52,3 53,5,8 57,6 59,1 63,3 66,7 #134 Oit 1kHz Lin db,3 46,7 69,5 48,7 49,3 51,2 52,7 54,1 57,4 59,8 #134 Oit 2kHz Lin db 52,6 46,4 67,0 48,8 49,2,2 51,0 51,9 53,8,8 #134 Oit 4kHz Lin db 51,1 43,1,8 46,6 47,3 48,8 49,7,8 52,7 53,8 #134 Oit 8kHz Lin db 43,1 35,8 59,0 37,7 38,2 39,7,9 42,7,5 46,9 Perf 9 - Fatigue Test (Small Hydraulic Servo) - Pump Noise Instron Leq = 63,1 / Lmax = 68,3 / RF = 61,6 #134 [Média] 125 Hz 63.1 db () A* k 2 k 4 k 8 k 16 k Lin* A* C* NR #134 Leq 20ms A 08/07/11 16:39:14:220 63,1 db 0h00m23s SEL 76,7 db #134 Leq 20ms Lin 08/07/11 16:39:14:220,1 db 0h00m23s SEL 83,7 db 38m52 38m54 38m56 38m58 39m00 39m02 39m04 39m06 39m08 39m10 39m12 39m14 Laboratorio_Forca009.CMG Início 08/07/11 16:38:51:000 Fim 08/07/11 16:39:14:2 Canal Tipo Peso Unidade Leq Lmin Lmax L95 L L L L30 L10 L5 #134 Leq A db 63,1 59,6 68,3 61,3 61,6 62,2 62,7 63,2 64,2 64,9 #134 Leq Lin db,1 64,9 84,2 66,7 67,1 68,3 69,0 69,9 71,2 72,1 #134 Oit 63Hz Lin db 59,7 49,3 69,1 54,5,2 57,4 58,8,1 62,1 63,2 #134 Oit 125Hz Lin db 63,1 51,7 69,8 57,5 58,7,9 62,3 63,7,6 66,5 #134 Oit 2Hz Lin db 63,3 54,3 68,9 59,0 59,9 61,6 62,7 63,9,4 66,0 #134 Oit 0Hz Lin db 61,1 54,9,2 57,1 58,0 59,4,4 61,4 62,9 64,0 #134 Oit 1kHz Lin db 57,5 51,9 66,2 54,5,1 56,2 56,9 57,7 59,0 59,6 #134 Oit 2kHz Lin db 53,2 48,5 62,9 51,0 51,3 52,0 52,6 53,1 54,2,2 #134 Oit 4kHz Lin db 52,4 49,4 57,4,6,9 51,6 52,1 52,6 53,4 53,9 #134 Oit 8kHz Lin db 48,5 46,0 51,3 47,2 47,5 48,0 48,4 48,7 49,3 49,5 Perf 10 - Fatigue test Instron Square Wave Leq = 72,6 / Lmax = 81,6 / RF = 68,2 #134 [Média] 2 Hz 74.3 db () A* k 2 k 4 k 8 k 16 k Lin* A* C* NR #134 Leq 20ms A 08/07/11 16:::9 72,6 db 0h00m17s8 SEL,1 db #134 Leq 20ms Lin 08/07/11 16:::9 78,3 db 0h00m17s8 SEL,8 db m24 m26 m28 m30 m32 m34 m36 m38 m Laboratorio_Forca010.CMG Início 08/07/11 16::23:000 Fim 08/07/11 16::41:0 Canal Tipo Peso Unidade Leq Lmin Lmax L95 L L L L30 L10 L5 #134 Leq A db 72,6 64,6 81,6 67,6 68,2 69,8,9 72,5,3 76,3 #134 Leq Lin db 78,2 69,5 87,0 73,0 73,7 74,8 76,0 77,4 81,7 82,8 #134 Oit 63Hz Lin db 66,9 53,5 79,3 58,7,3 63,1,2 67,0,0 71,2 #134 Oit 125Hz Lin db 68,6 53,7 78,9 62,3 63,1,1 66,5 68,0 71,5 73,8 #134 Oit 2Hz Lin db 74,3,9,2 64,6,4 67,4 69,0 71,0 79,2,7 #134 Oit 0Hz Lin db 69,4 57,2 81,2 61,1 62,0 64,6 66,7 69,0 72,8 74,3 #134 Oit 1kHz Lin db,6 54,5,2 58,5 59,2 61,3 63,2,6 68,8,4 #134 Oit 2kHz Lin db,6 53,9 69,3,7 56,2 57,6 58,8,7 63,6 64,7 #134 Oit 4kHz Lin db 63,1 54,2 68,0 58,0 59,3 61,8 63,1 63,8 64,9,4 #134 Oit 8kHz Lin db 64,8 54,0 69,3 57,9 59,6 62,5 64,3 66,0 67,3 67,7 Perf 11 - Fatigue Testing - Instron 82 - with background noise Leq = 69,0 / Lmax = 78,1 / RF = 66,9 #134 [Média] 0 Hz 68.1 db () 35 A* k 2 k 4 k 8 k 16 k Lin* A* C* NR #134 Leq 20ms A 08/07/11 16:46:25:0 69,0 db 0h00m25s420 SEL 83,1 db #134 Leq 20ms Lin 08/07/11 16:46:25:0 76,0 db 0h00m25s420 SEL,0 db 46m25 46m30 46m35 46m 46m 46m Laboratorio_Forca011.CMG Início 08/07/11 16:46:25:000 Fim 08/07/11 16:46::6 Canal Tipo Peso Unidade Leq Lmin Lmax L95 L L L L30 L10 L5 #134 Leq A db 69,0 64,8 78,1 66,5 66,9 67,8 68,4 69,1,3 71,4 #134 Leq Lin db 76,0 69,9 92,9 71,8 72,4 73,6 74,4,4 77,3 78,6 #134 Oit 63Hz Lin db 66,2 52,2 83,3 58,7 59,9 62,3 63,6,1 67,5 69,1 #134 Oit 125Hz Lin db 66,8 54,2 81,4 61,0 62,0 64,0,4 66,8 68,7 69,5 #134 Oit 2Hz Lin db 66,4 59,0 73,9 62,4 63,1 64,7,9 66,9 68,3 69,2 #134 Oit 0Hz Lin db 68,1,3,0 63,8 64,7 66,3 67,4 68,6,2 71,1 #134 Oit 1kHz Lin db 64,3 57,2 74,2,7 61,3 62,7 63,6 64,5 66,4 67,2 #134 Oit 2kHz Lin db 59,6,7 72,5 56,7 57,1 58,0 58,5 59,1,5 62,3 #134 Oit 4kHz Lin db 56,5 52,6,7 53,7 54,0 54,7,3,9 57,2 58,9 #134 Oit 8kHz Lin db 49,4 41,3 68,5 43,5 43,9 44,7,4 46,1 49,1 52,4

8 8 of 13 Perf 12 A - Profiling the cafeteria to the Instron operating with background noise with square wave Leq = 74,3 / Lmax =,9 / RF =,2 #134 [Média] 125 Hz 71.6 db () A* k 2 k 4 k 8 k 16 k Lin* A* C* NR #134 Leq 20ms A 08/07/11 16:48:12:8 74,3 db 0h00m41s7 SEL,5 db #134 Leq 20ms Lin 08/07/11 16:48:12:8 78,2 db 0h00m41s7 SEL 94,4 db 47m35 47m 47m 47m 47m 48m00 48m05 48m10 Laboratorio_Forca012.CMG Início 08/07/11 16:47:31:000 Fim 08/07/11 16:48:12:8 Canal Tipo Peso Unidade Leq Lmin Lmax L95 L L L L30 L10 L5 #134 Leq A db 74,3 66,6,9 69,5,2 71,7 72,9 74,4 77,3 78,4 #134 Leq Lin db 78,2 71,8 92,8 74,3 74,8 76,1 77,3 78,6,0,5 #134 Oit 63Hz Lin db 71,3,0 88,3 57,4 59,5 64,6 68,4,8 74,4 76,1 #134 Oit 125Hz Lin db 71,6 53,1 83,7 59,4 61,3 64,5 67,0,2 77,2 78,0 #134 Oit 2Hz Lin db 67,3 56,4 82,7 61,7 62,9 64,9 66,2 67,4 69,4,4 #134 Oit 0Hz Lin db 69,9 62,0,9,2 66,1 67,8 68,9,1 72,1 73,1 #134 Oit 1kHz Lin db 68,5 59,3 76,2 62,8 63,5,6 67,2 68,6 71,5 72,7 #134 Oit 2kHz Lin db 68,3 57,2 76,2,4 61,5 64,2 66,3 68,5 72,0 73,2 #134 Oit 4kHz Lin db 66,0 54,1 74,3 57,0 58,1,9 63,4 66,7 69,7 71,1 #134 Oit 8kHz Lin db 53,4 47,2,1 48,5 48,9,2 52,0 53,4 56,3 57,5 Perf 12 B - Event Leq = 78,4 / Lmax =,9 / RF =,2 #134 [Média] 63Hz 81.6 db () A* k 2 k 4 k 8 k 16 k Lin* A* C* NR #134 Leq 20ms A 08/07/11 16:48:12:1 74,1 db 0h00m00s8 SEL 73,3 db #134 Leq 20ms Lin 08/07/11 16:48:12:1,3 db 0h00m00s8 SEL 84,6 db 47m35 47m 47m 47m 47m 48m00 48m05 48m10 The bottom of the graphs shows the historical of the analyses (perf) in db (lin) and db (A). The lowest línea and the SPL value of time in.. Of Perf 13 - control room on 2nd floor - Open door. Perf 14 - Control Room on 2nd floor - Closed Door. Leq = 59,8 / Lmax = 66,7 / RF = 56,5 #134 [Média] 0 Hz 56.6 db () A* 59.9 Leq = 56,8 / Lmax =,7 / RF = 52,0 #134 [Média] 1 khz 53.0 db () A* k 2 k 4 k 8 k 16 k Lin* A* C* NR #134 Leq 20ms A 08/07/11 16:49:32:0 59,8 db 0h00m25s0 SEL 73,9 db #134 Leq 20ms Lin 08/07/11 16:49:32:0 68,1 db 0h00m25s0 SEL 82,2 db 49m35 49m 49m 49m 49m Laboratorio_Forca013.CMG Início 08/07/11 16:49:32:000 Fim 08/07/11 16:49:57:0 Canal Tipo Peso Unidade Leq Lmin Lmax L95 L L L L30 L10 L5 #134 Leq A db 59,8 54,7 66,7 56,3 56,5 57,5 59,0,6 61,9 62,6 #134 Leq Lin db 68,1 59,5 79,2 62,6 63,7,2 66,4 68,0,5 72,4 #134 Oit 63Hz Lin db 54,4 41,8 63,6 47,0 48,1 51,0 52,9 54,7 57,5 58,5 #134 Oit 125Hz Lin db 54,4 41,7 62,7 48,4 49,5 51,8 53,4 54,9 57,1 58,1 #134 Oit 2Hz Lin db 56,2,0 64,2 49,8 51,0 53,4 54,9 56,6 59,1,1 #134 Oit 0Hz Lin db 56,6 47,1 68,0 51,1 51,9 53,8,1 56,8 59,2,3 #134 Oit 1kHz Lin db 54,5 47,1,4 48,9 49,6 51,3 53,1 54,8 57,1 58,1 #134 Oit 2kHz Lin db 53,4 48,2,5 49,6,0 51,0 52,4 54,2,8 56,3 #134 Oit 4kHz Lin db 49,8 44,8,3 46,2 46,5 47,4 48,9,6 52,1 52,7 #134 Oit 8kHz Lin db 36,2 31,1 44,0 32,7 33,1 34,2 35,4 36,9 38,3 39, k 2 k 4 k 8 k 16 k Lin* A* C* NR #134 Leq 20ms A 08/07/11 16::58:4 56,5 db 0h00m26s1 SEL,7 db #134 Leq 20ms Lin 08/07/11 16::58:4 68,8 db 0h00m26s1 SEL 82,9 db m35 m m m m Laboratorio_Forca014.CMG Início 08/07/11 16::32:000 Fim 08/07/11 16::58:720 Canal Tipo Peso Unidade Leq Lmin Lmax L95 L L L L30 L10 L5 #134 Leq A db 56,8,1,7 51,6 52,0 52,9 53,6 54,8 59,9 62,2 #134 Leq Lin db 69,0,8 82,8,0 61,1 64,4 66,5 68,7 71,7 73,7 #134 Oit 63Hz Lin db 57,7 37,3 76,4 46,5 48,2 51,1 52,9,0 57,9,1 #134 Oit 125Hz Lin db,4,5 71,7 47,5 48,3 51,0 52,9,1 58,2 59,7 #134 Oit 2Hz Lin db 54,0 42,8 66,4 46,9 48,2,5 52,3 53,9 56,8 58,4 #134 Oit 0Hz Lin db 52,0,0 62,5 47,5 48,3 49,9,9 52,0 54,1,5 #134 Oit 1kHz Lin db 53,5,6 69,2 43,7 44,6 46,2 47,9 49,7 56,1,0 #134 Oit 2kHz Lin db 49,3 39,8 63,6 42,3 43,1 44,9,9 46,9 52,1,5 #134 Oit 4kHz Lin db 42,7 36,2 56,2 37,8 38,5,5 41,9 43,2 44,6,6 #134 Oit 8kHz Lin db 31,2 24,3 51,1 25,8 26,5 27,7 28,8 30,4 33,2 34,6

9 9 of 13 C.2.A - Contours of sound pressure levels and Occupational Exposure (NoiseATWork_3R Method) Refers to the analysis of exposure from the mapping and study of sound pressure levels (SPL) in workplaces and operations where employees work. Based on the measured noise levels and working hours. It is calculated the contours of sound pressure level in the environments, and also the exposure value of the day: TWA and TWAx, related to the mean sound pressure levels of exposure and normalized for the journey work according to the exchange rate q = 3 or q = 5.And are also provided the exposure doses, among other functions of the software NoiseAtWork for occupational analysis. Results Exposure by Homogeneous Group or Similar: GHE - Homogeneous Exposure Group; GES - Similar Exposure Group a) GHE/GES LF-1 - Teacher/ Laboratory of Strength /Usual Situation 1 - Normal tests at Instrons with the pumps turned on:

10 10 of 13 b) GHE/GES LF-2H e 2E - Technique/ Laboratory of Strength /Usual and Eventual; Situation 2 Tensile tons tests carried in 10 minutes:

11 11 of 13 The different tables referents to situations encountered with the placement of workplaces corresponding with the time exposure of the employee in the spot should be used as environmental statement for occasional or regular activities, working in risk management of occupational noise in the laboratory. In the above table next to the sketch can be seen an average standard of less than We simulated work processes at the environment more critical situation and informing the exposure level of the day and the corresponding dose that was below % in more critical usual activities. So there is no overcoming of the global average levels normalized as Lex, 8h and TWA for q = 3 which are the same for estimating the workday of 8 hours. However, Lmax levels higher than db (A) / db (Lin) at the time of rupture of the specimen during the tons test, creates a grave or imminent risk situation within a radius of more than 1 meter of the source if not used PPE. During the 20 tons test values exceed Measurement values of the tons test: Laboratorio_Forca001.CMG Início 08/07/11 16:08:46:000 Fim 08/07/11 16:13:06:5 Canal Tipo Peso Unidade Leq Lmin Lmax L95 L L L L30 L10 L5 #134 Leq A db 88,5 72,3 121,8 74,8,1,8 76,3 76,9 78,2 79,9 #134 Leq Lin db 89,1 74,2 122,3 76,5 76,9 77,6 78,2 78,8,9 82,9 #134 Rápido A db 88,6 73,5 118,2,1,4 76,0 76,5 77,1 78,5,0 #134 Oit 63Hz Lin db 69,7 42,4 102,4,8 52,0 54,4 56,1 57,7,7 64,2 #134 Oit 125Hz Lin db 74,1 58,3 105,3 66,1 66,9 68,4 69,3,2 71,6 72,7 #134 Oit 2Hz Lin db 78,9 57,2 113,8 63,9,1 67,4 68,9,3 72,3 73,6 #134 Oit 0Hz Lin db 79,2,6 113,6 64,7,4 67,0 68,1 69,6 74,8 78,3 #134 Oit 1kHz Lin db 83,1 63,7 118,5 68,7 69,5 71,2 72,3 73,5,1 76,0 #134 Oit 2kHz Lin db 82,3 64,7 115,5 67,5 68,0 68,9 69,6,3 71,4 72,0 #134 Oit 4kHz Lin db 81,3 63,2 114,2 66,2 66,6 67,3 67,8 68,3 69,2 69,7 #134 Oit 8kHz Lin db 79,0 52,2 114,1 54,3 54,7,4 56,0 56,6 57,5 58,0 C.2.B Neutralization of the risk agent: The purposes of this procedure are: avoid the occurrence of occupational exposure to noise that can lead to noise-induced hearing loss, comply with the Hearing Conservation Program and protect employees, contractors and students of potential hearing damage due to exposure to environmental noise. Company`s PPE(s) Analyses: The technical analysis of the attenuation of earplugs follows the method 1 (long) from NIOSH and takes into account the frequency distribution of noise in the local and the approval certificate of the PPE. Three critical measurements were chosen to perform the calculation efficiency of PPE (standardized by the company). These measurements refer to higher risk exposure of the frequency mapping of the the company, highlighting the higher noise and distribution in critical frequency bands. Therefore, It will be done the calculation of attenuation and chosen the least favorable. This way we can ensure that mitigation found will be the most critical and applied to the entire company or sector as the the Hearing Conservation Program strategies. Below (in the table) are presented the Global Attenuations obtained from the analysis results in different locations / activities using the long method of NIOSH, as recommended by the Normative instruction INSS 78 / 84 / 99 / 118 and ACGIH. The calculation of actual efficiency of the EPI in the environment was made from the measurement Leq data by octaves, and trough attenuation and standard deviation by octaves provided by the Ministry of Labour and Employment and from the approval certificate.

12 12 of 13 Perf (1) Attenuation: 25,2 / NIC 81,5 Perf (3) Attenuation: 26,1 / NIC 94,0 Perf (7) Attenuation: 23,7 / NIC 73,3 C.2.B Attenuation Found using NIOSH 01 AC: 26 ID Sound Field (ref. Graphs of SPL Auger ) Inserction protector (MSA Cupped ear ) Subjectiv Conf. 98% Intelligibility NIC of the Spot OBSERVATION A (Perf 1) Traction test operation - tons Not recommended for this activity Real Attenuation 25,2 db 81,5 db Measurement performed at the worker's ear during the operation B (Perf 3) Servo hydraulic pump room - Open Door Not recommended for this activity Real Attenuation 26,1 db 94,0 db Medição realizada na altura do ouvido do trabalhador durante a operação. C ( Perf 7) Test with the Traction machine - 20 tons Not recommended for this activity Real Attenuation 73,3 db Medição realizada na altura do ouvido do trabalhador durante a operação. According to the methodology employed (item 7.2 of the report) it will be considered the lowest attenuation calculated among each type of protector. According to item C (Perf 7) - Tests with Traction Machine - 20 tons Cupped ear (AC 26) of MSA attenuation that should be employed: (Considering 98% of reliability). It can be verified that, using the long method of NIOSH, the more conservative, that the PPE attenuation of employee is the lowest calculated, therefore, it can be said with 98% confidence that the attenuation in various areas of the company will always be better than suggested in this report. Note: It is recommended to use the subjective method of attenuation of the real ear (IN 78 / 105 / 118 INSS). However, the legislator allows the application of the simplified method NRRsf, taken directly from information in the Approval certificate of the protector. We alert that the simplified method NRRsf only has 84% reliability that could leave the company at a disadvantage if there is hearing loss with indications of high sound pressure level.

13 13 of 13 C.3. Results of measurements of the Day Exposure of Employees (reports and supplementary reports) Evaluation of daily exposure to high sound pressure level: The noise measurements must be made when identifying critical or high inherent risk in evaluations or when the exposure can exceed ; The noise measurements shall be made annually or whenever there is a change in the production process or new equipment is installed or used; If the noise peak (pulse) exceeds 115 and / or 1 db(c) during the measurement, the staff area will be automatically included in the hearing conservation program, including audiometric exam; It should be informed how long the work journey or percentage of has exceeded the value of ; The values should be compared with those obtained by the mapping of the company. The noise measurements should be based on the use of a sound level meter (SLM) of the kind Audio-dosimeter, with exchange rate of 3 db and/or 5 db, a weight scale, capacity to measurement RMS noise from db (a) and Peak with verification process with acoustic calibrator according to NHO-01 (FUNDACENTRO), with deviations less than 1 db or ± manufacturer's instructions. So for the local criterion should be applied the NR-15 Annex 1 and NR-9. Therefore, the exchange rate (double) will be applied to q = 5 and / or q = 3 and the integration limit (threshold) of db (A) and / or 82.0 db (A). In addition the value should be reported to the discretion of Fundacentro q = 3 and integration limit (thr) of 82 db (A) with threshold criteria of db (A) for the time criterion of 8 hours. D) CONSIDERATIONS The methodology used by 3R Brasil Tecnologia Ambiental with the softwares NoiseAtWork and GerenteSST has been allowing early identification of critical points related to the exposure of employees and possible deviations from previous measurements, supporting the results baptized into Homogeneous Exposure Groups. Neutralization and control measures must be implemented by the company, and require use of hearing protection, should separate areas during the tests break with the t machine. It should be alerted with tape or markings of the contours by not allowing unauthorized, untrained and without PPE. The reliability of the method of neutralization with EPI is 98%, as well as being applied to the attenuation of PPE obtained by the 01 NIOSH-long method applies the sound pressure level attenuation of the journey by octaves found in % of journey, and the remaining 10% considered PPE without analysis as to the safety factor and to estimate the break. Measurements were made with frequency analyzer, which allowed us to identify and analyze the characteristics of the main sources. Measurements made in octaves were available in octaves in the body of this document and provides the assumptions and information necessary for the implementation of control measures and engineering projects. Rio de Janeiro, 07th October 2011, Rogério Dias Regazzi Msc. Engenheiro de Segurança do Trabalho e Especialista em Acústica CREA CREA-RJ /D (Nova carteira) Ref.