Dilution Ventilation - Bioenvironmental Engineering Apprentice

DILUTION VENTILATION Bioenvironmental Engineering Apprentice works best in these conditions: Other more costeffective controls are not available Air contaminants have a relatively low toxicity Air contaminants consist of gases, vapors, or aerosols Emissions occur uniformly in time Emission sour...

DILUTION VENTILATION Bioenvironmental Engineering Apprentice works best in these conditions: Other more costeffective controls are not available Air contaminants have a relatively low toxicity Air contaminants consist of gases, vapors, or aerosols Emissions occur uniformly in time Emission sources are dispersed and not close to “breathing zone Air used is not contaminated Facility is located in a moderate climate 5a HVAC system used is capable of maintaining temp. and humidity FACTORS IN SELECTING DILUTION VENTILATION UNCLASSIFIED//FOR OFFICIAL USE ONLY 51 DILUTION VENTILATION Bioenvironmental Engineering Apprentice advantages Lower equipment and installation costs Requires less maintenance Effective control for small amounts of low toxicity chemicals Systems are not co-located with source disadvantages Does not completely remove contaminant 5a Cannot be used for high toxicity chemicals Ineffective for large amounts of dusts, fumes, gases Ineffective for handling surges of gas/vapor emissions ADVANTAGES AND DISADVANTAGES UNCLASSIFIED//FOR OFFICIAL USE ONLY 52 DILUTION VENTILATION Bioenvironmental Engineering Apprentice room volume = lxwxh HEIGHT (ft) (length x width x height) WIDTH (ft) LENGTH (ft) 5a DILUTION VENTILATION EQUATIONS UNCLASSIFIED//FOR OFFICIAL USE ONLY 53 DILUTION VENTILATION Bioenvironmental Engineering Apprentice Volume of room Volumetric Flow Rate Room Volume = Length (ft) X width (ft) X Height (ft) Q=AxV Air Changes/Hour Minimum Q Required AC/hr = 5a Q x 60 min/hr Q = AC/min x Room volume Room volume DILUTION VENTILATION EQUATIONS UNCLASSIFIED//FOR OFFICIAL USE ONLY 54 DILUTION VENTILATION Bioenvironmental Engineering Apprentice smoke tubes magnehelic gauge balometer SURVEY EQUIPMENT 5a UNCLASSIFIED//FOR OFFICIAL USE ONLY 55 DILUTION VENTILATION Bioenvironmental Engineering Apprentice Objective 5a Block 4 Unit 5 State basic principles associated with dilution ventilation. 5a 5a 5a Definitions Factors in Selecting Dilution Ventilation 5a Advantages and Disadvantages 5a Dilution Ventilation Equations Survey Equipment UNCLASSIFIED//FOR OFFICIAL USE ONLY 56 LOCAL EXHAUST VENTILATION Bioenvironmental Engineering Apprentice Objective 6a Block 4 Unit 6 Identify types and basic principles of local exhaust ventilation (LEV) systems. 6a 6a Advantages and Disadvantages LEV System 6a 6a Types of Hoods Design Parameters References UNCLASSIFIED//FOR OFFICIAL USE ONLY 57 LOCAL EXHAUST VENTILATION Bioenvironmental Engineering Apprentice Local Exhaust Ventilation (LEV) System Mechanical system designed to capture and remove emissions prior to their escape into the workplace environment Typically consists of: hood exhausted enclosure ductwork air cleaner fan stack(s) removes contaminant directly from its source before it can disperse into the general workplace atmosphere 6a LEV SYSTEM UNCLASSIFIED//FOR OFFICIAL USE ONLY 58 LOCAL EXHAUST VENTILATION Bioenvironmental Engineering Apprentice Air volume Cost advantages Contaminant Dispersion Worker Exposure Cost False Security disadvantages Worker Access 6a Noise ADVANTAGES AND DISADVANTAGES UNCLASSIFIED//FOR OFFICIAL USE ONLY 59 LOCAL EXHAUST VENTILATION Bioenvironmental Engineering Apprentice enclosing exterior adjacent to emission source completely or partially encloses contaminant Receiving Hoods Capture Hoods Paint Booth Isolates the process from worker and workspace 6a various shapes and sizes This type of hood requires a capture velocity calculation TYPES OF HOODS UNCLASSIFIED//FOR OFFICIAL USE ONLY 60 LOCAL EXHAUST VENTILATION Bioenvironmental Engineering Apprentice MANUFACTURER Minimum duct velocity Manufacturer Guidance Capture velocity Airflow volume DOEHRS Another source for locating information on a vent system’s parameters Defense Occupational and Environmental Health Readiness System ACGIH-IVM Preinstallation guidelines and parameters Report completed by BE technician and documented in DOEHRS American Conference of Governmental Industrial Hygienists Industrial Ventilation Manual pre-survey form Ventilation Pre-Survey Form DESIGN PARAMETERS REFERENCES 6a Manufacturer Guidance AC GIH-IVM Manual UNCLASSIFIED//FOR OFFICIAL USE ONLY DOEHRS Ventilation Pre-Survey Form 61 LOCAL EXHAUST VENTILATION Bioenvironmental Engineering Apprentice Objective 6a Block 4 Unit 6 Identify types and basic principles of local exhaust ventilation (LEV) systems. 6a 6a Advantages and Disadvantages LEV System 6a 6a Types of Hoods Design Parameters References UNCLASSIFIED//FOR OFFICIAL USE ONLY 62 VENTILATION SURVEY REQUIREMENTS Bioenvironmental Engineering Apprentice Objective Block 4 Unit 7 List ventilation survey requirements. 7a 7a 7a Types of Surveys Survey Equipment UNCLASSIFIED//FOR OFFICIAL USE ONLY 63 VENTILATION SURVEY REQUIREMENTS Bioenvironmental Engineering Apprentice PRE-SURVEY INITIAL SURVEY BASELINE SURVEY ROUTINE SURVEY Used to Used to Used to Used to PLAN DETERMINE TEST CHECK full-scale ventilation survey Initial acceptance standards ventilation system ventilation system TYPES OF SURVEYS 7a UNCLASSIFIED//FOR OFFICIAL USE ONLY 64 VENTILATION SURVEY REQUIREMENTS Bioenvironmental Engineering Apprentice PRE-SURVEY INITIAL SURVEY BASELINE SURVEY ROUTINE SURVEY BE ROLES DURING VENTILATION SURVEYS 7a UNCLASSIFIED//FOR OFFICIAL USE ONLY 65 VENTILATION SURVEY REQUIREMENTS Bioenvironmental Engineering Apprentice PRE-SURVEY INITIAL SURVEY BASELINE SURVEY ROUTINE SURVEY Conducted BEFORE operation in order to document: Who What Where When Why How 7a TYPES OF SURVEYS UNCLASSIFIED//FOR OFFICIAL USE ONLY 66 VENTILATION SURVEY REQUIREMENTS Bioenvironmental Engineering Apprentice PRE-SURVEY INITIAL SURVEY Conducted BEFORE operation in order to document: Who What Where When Why How Conducted before system put into operation to evaluate key parameters 7a BASELINE SURVEY ROUTINE SURVEY TYPES OF SURVEYS UNCLASSIFIED//FOR OFFICIAL USE ONLY 67 VENTILATION SURVEY REQUIREMENTS Bioenvironmental Engineering Apprentice PRE-SURVEY INITIAL SURVEY BASELINE SURVEY Conducted BEFORE operation in order to document: Who What Where When Why How Conducted BEFORE system put into operation to evaluate key parameters Conducted AFTER system put into operation to evaluate if worker(s) are being Protected 7a ROUTINE SURVEY TYPES OF SURVEYS UNCLASSIFIED//FOR OFFICIAL USE ONLY 68 VENTILATION SURVEY REQUIREMENTS Bioenvironmental Engineering Apprentice PRE-SURVEY INITIAL SURVEY BASELINE SURVEY ROUTINE SURVEY Conducted BEFORE operation in order to document: Who What Where When Why How Conducted BEFORE system put into operation to evaluate key parameters Conducted AFTER system put into operation to evaluate if worker(s) are being Protected Conducted on a regular basis to make sure system is still operating adequately 7a TYPES OF SURVEYS UNCLASSIFIED//FOR OFFICIAL USE ONLY 69 VENTILATION SURVEY REQUIREMENTS Bioenvironmental Engineering Apprentice face velocity measures velocity at face of hood volumetric flow rate = AIR VELOCITY x HEAT TRANSFER PRINCIPLES HOOD FACE AREA instrument used: Thermoanemometer 7a SURVEY EQUIPMENT UNCLASSIFIED//FOR OFFICIAL USE ONLY 70 VENTILATION SURVEY REQUIREMENTS Bioenvironmental Engineering Apprentice pitot traverse measures velocity and static pressure Pitot Tube 7a instrument used: Inclined Manometer SURVEY EQUIPMENT UNCLASSIFIED//FOR OFFICIAL USE ONLY 71 VENTILATION SURVEY REQUIREMENTS Bioenvironmental Engineering Apprentice Objective 7a Block 4 Unit 7 List ventilation survey requirements. 7a 7a Types of Surveys Survey Equipment UNCLASSIFIED//FOR OFFICIAL USE ONLY 72 PITOT TRAVERSE SURVEYS Bioenvironmental Engineering Apprentice Objective 8a Block 4 Unit 8 Given references, survey equipment, and a ventilation system, perform pitot traverse ventilation survey and static pressure check IAW PT-IV-8a. 8a 8a Survey Materials and Equipment UNCLASSIFIED//FOR OFFICIAL USE ONLY Pitot Traverse Survey Steps 73 PITOT TRAVERSE SURVEYS Bioenvironmental Engineering Apprentice Objective 8b Block 4 Unit 8 Given ventilation survey data and references, perform ventilation calculations IAW PT-IV-9b. 8b Calculations UNCLASSIFIED//FOR OFFICIAL USE ONLY 74 FACE AND CAPTURE SURVEYS Bioenvironmental Engineering Apprentice Objective 9a Block 4 Unit 9 Given a ventilation system, survey equipment, and references, perform face and capture ventilation surveys IAW PT-IV-9a. 9a 9a 9a Survey Materials and Equipment Face Velocity Survey Steps UNCLASSIFIED//FOR OFFICIAL USE ONLY Capture Velocity Survey Steps 75 FACE AND CAPTURE SURVEYS Bioenvironmental Engineering Apprentice Objective 9b Block 4 Unit 9 Given ventilation survey data and references, perform ventilation calculations IAW PT-IV-9b. 9b Calculations UNCLASSIFIED//FOR OFFICIAL USE ONLY 76 VENTILATION FOLLOW-UP Bioenvironmental Engineering Apprentice Block 4 Unit 10 Identify basic follow-up actions for deficient ventilation systems. Objective 10a 10a 10a Deficiency Identification Troubleshooting and Repair 10a 10a Additional Surveys UNCLASSIFIED//FOR OFFICIAL USE ONLY Responsibilities 77 VENTILATION FOLLOW-UP Bioenvironmental Engineering Apprentice Baseline Survey Acceptable operating range established 10a DEFICIENCY IDENTIFICATION UNCLASSIFIED//FOR OFFICIAL USE ONLY 78 VENTILATION FOLLOW-UP Bioenvironmental Engineering Apprentice Routine Survey Conducted once a year, every 6 months, or every 3 months Vent is considered DEFICIENT when readings fall outside baseline survey parameters 10a DEFICIENCY IDENTIFICATION UNCLASSIFIED//FOR OFFICIAL USE ONLY 79 VENTILATION FOLLOW-UP Bioenvironmental Engineering Apprentice Troubleshooting is the process of determining the cause of the problem Fixing the problem without addressing the cause of the problem is NOT really fixing it 10a Troubleshooting and Repair UNCLASSIFIED//FOR OFFICIAL USE ONLY 80 VENTILATION FOLLOW-UP Bioenvironmental Engineering Apprentice POTENTIAL CAUSES OF REDUCED AIRFLOW FAN ROTATION DIRECTION CLOGGED OR CORRODED FAN WHEEL AND CASING 10a FAN ROTATIONS PER MINUTE SLIPPING FAN BELT SLIPPING FAN BELT CLOGGED DUCTWORK LEAKING DUCTWORK CLOSED OR OPEN DAMPERS IN DUCTWORK Troubleshooting and Repair UNCLASSIFIED//FOR OFFICIAL USE ONLY 81 VENTILATION FOLLOW-UP Bioenvironmental Engineering Apprentice WORK ORDERS Submitted to Civil Engineering once troubleshooting has been accomplished 10a Troubleshooting and Repair UNCLASSIFIED//FOR OFFICIAL USE ONLY 82 VENTILATION FOLLOW-UP Bioenvironmental Engineering Apprentice RE-BASELINE RE-SURVEY A ventilation survey must be accomplished after maintenance This ensure it has returned to baseline operating conditions. 10a A new baseline should be considered if troubleshooting does not identify issues that can be corrected ADDITIONAL SURVEYS UNCLASSIFIED//FOR OFFICIAL USE ONLY 83 VENTILATION FOLLOW-UP Bioenvironmental Engineering Apprentice BIOENVIRONMENTAL ENGINEERING Survey all ventilation systems that are controlling a hazard CIVIL ENGINEERING Perform routine maintenance and troubleshooting on ventilation systems Primary POC for repair BE WORKPLACE SUPERVISOR WORKER Contact BE prior to any ventilation system being put in use Use ventilation system properly and report any issues to shop supervisor Report HVAC deficiencies to Civil Engineering 10a RESPONSIBILITIES UNCLASSIFIED//FOR OFFICIAL USE ONLY 84 VENTILATION FOLLOW-UP Bioenvironmental Engineering Apprentice Objective 10a Block 4 Unit 10 Identify basic follow-up actions for deficient ventilation systems. 10a 10a Deficiency Identification Troubleshooting and Repair 10a 10a Additional Surveys UNCLASSIFIED//FOR OFFICIAL USE ONLY Responsibilities 85 VENTILATION DATA IN DOEHRS Bioenvironmental Engineering Apprentice Objective 11a Block 4 Unit 11 Given instructional workbook computer and internet access, input a ventilation survey into DOEHRS IAW PC-IV-11a. 11a 11a Input Ventilation System UNCLASSIFIED//FOR OFFICIAL USE ONLY Input Ventilation Survey 86 RESPIRATORY PROTECTION PROGRAM Bioenvironmental Engineering Apprentice Objective 12a Block 4 Unit 12 Identify roles and responsibilities of BE, the program administrator, the workplace supervisor, and the worker in the Respiratory Protection Program (RPP). 12a 12a Introduction and Guidance UNCLASSIFIED//FOR OFFICIAL USE ONLY Responsibilities 87 RESPIRATORY PROTECTION PROGRAM Bioenvironmental Engineering Apprentice 29 Code of Federal Regulations (CFR) 1910.134, Respiratory Protection PURPOSE 29 CFR 1910 Subpart ZToxic and Hazardous Substances PURPOSE AFI 48-137 NIOSH Certified Equipment Listing PURPOSE Respiratory Protection Program Manufacturer’s Literature (1910.1000 Series Regulations) OSHA Guidance 12a USAF Guidance Other Guidance INTRODUCTION AND GUIDANCE UNCLASSIFIED//FOR OFFICIAL USE ONLY 88 B RESPIRATORY PROTECTION PROGRAM Bioenvironmental Engineering Apprentice Authority for determining if RPP is required Installation Program administrator Develops training for supervisors Ensures procedures exist for ordering and issuing of respirators Review, recommend, and approve respirators for use Authorize and annually evaluate units to conduct fit testing 12a Conduct industrial respirator/CBRN mask fit tests Manage respirator selection, rosters and fit testing in DOEHRS Provides guidance to workplace supervisors & review written plan/training program annually BE RESPONSIBILITIES UNCLASSIFIED//FOR OFFICIAL USE ONLY 89 RESPIRATORY PROTECTION PROGRAM Bioenvironmental Engineering Apprentice Appointed by the installation Commander MUST BE: A qualified BE Has overall oversight of the installation RP Program Fully qualified BE Technician Civilian Industrial Hygienist Must be qualified by training or experience 12a INSTALLATION RPP ADMINISTRATOR UNCLASSIFIED//FOR OFFICIAL USE ONLY 90 SUPERVISOR RESPIRATORY PROTECTION PROGRAM Bioenvironmental Engineering Apprentice Develop written program with specific procedures Review written specific procedures and have approved by BE Designate use, maintenance, inspection, and care of respirators 12a Develop training material and ensure workers are trained on the use of respirators in their workplace Maintain copies of fittest results Ensure workers adhere to the worksite-specific procedures Notify BE with roster or medical status changes Regularly consult respirator users to assess program effectiveness WORKPLACE SUPERVISOR RESPONSIBILITIES UNCLASSIFIED//FOR OFFICIAL USE ONLY 91 RESPIRATORY PROTECTION PROGRAM Bioenvironmental Engineering Apprentice Workers Must: Adhere to conditions of the written procedures Maintain filter use records to ensure compliance with the change-out schedule Report any change in medical status, which may impact their ability to safely wear a respirator 12a WORKER RESPONSIBILITIES UNCLASSIFIED//FOR OFFICIAL USE ONLY 92 RESPIRATORY PROTECTION PROGRAM Bioenvironmental Engineering Apprentice Objective 12a Block 4 Unit 12 Identify roles and responsibilities of BE, the program administrator, the workplace supervisor, and the worker in the Respiratory Protection Program (RPP). 12a 12a Introduction and Guidance UNCLASSIFIED//FOR OFFICIAL USE ONLY Responsibilities 93 RESPIRATORS Bioenvironmental Engineering Apprentice Objective 13a Recall the operating principles, types, and components of respirators. 13a 13a 13a Definitions 13a Block 4 Unit 13 Categories of Respiratory Protection Types of Respirators 13a Types of Filters and Cartridges UNCLASSIFIED//FOR OFFICIAL USE ONLY 13a Major Components of a Respirator and Their Function Advantages and Disadvantages of Respirator Types 94 RESPIRATORS Bioenvironmental Engineering Apprentice IMMEDIATELY DANGEROUS TO HEALTH (IDLH) OXYGEN DEFICIENT ATMOSPHERE SKIN ABSORPTION WARNING PROPERTIES LOWER EXPLOSIVE LIMIT (LEL) CHANGE-OUT SCHEDULE ASSIGNED PROTECTION FACTOR ODOR THRESHOLD (IDLH) 13a OXYGEN DEFICIENT ATMOSPHERE SKIN ABSORPTION WARNING PROPERTIES Immediately Dangerous to Life and Health “any condition that poses an immediate or delayed threat to life, or would cause irreversible adverse health effects, or would interfere with an individual’s ability to escape unaided from a contaminated area” LOWER EXPLOSIVE LIMIT (LEL) DEFINITIONS UNCLASSIFIED//FOR OFFICIAL USE ONLY CHANGEOUT SCHEDULE ASSIGNED PROTECTION FACTOR ODOR THRESHOLD 95 RESPIRATORS Bioenvironmental Engineering Apprentice IMMEDIATELY DANGEROUS TO HEALTH (IDLH) OXYGEN DEFICIENT ATMOSPHERE SKIN ABSORPTION WARNING PROPERTIES LOWER EXPLOSIVE LIMIT (LEL) CHANGE-OUT SCHEDULE ASSIGNED PROTECTION FACTOR ODOR THRESHOLD IDLH 13a OXYGEN DEFICIENT ATMOSHPERE SKIN ABSORPTION WARNING PROPERTIES Oxygen Deficient Atmosphere “any atmosphere that contains less than 19.5% oxygen” LOWER EXPLOSIVE LIMIT (LEL) DEFINITIONS UNCLASSIFIED//FOR OFFICIAL USE ONLY CHANGEOUT SCHEDULE ASSIGNED PROTECTION FACTOR ODOR THRESHOLD 96 RESPIRATORS Bioenvironmental Engineering Apprentice IMMEDIATELY DANGEROUS TO HEALTH (IDLH) OXYGEN DEFICIENT ATMOSPHERE SKIN ABSORPTION WARNING PROPERTIES LOWER EXPLOSIVE LIMIT (LEL) CHANGE-OUT SCHEDULE ASSIGNED PROTECTION FACTOR ODOR THRESHOLD IDLH 13a OXYGEN DEFICIENT ATMOSPHERE SKIN ABSORPTION WARNING PROPERTIES Skin Absorption “a chemical passes through the outer surface of the skin” LOWER EXPLOSIVE LIMIT (LEL) DEFINITIONS UNCLASSIFIED//FOR OFFICIAL USE ONLY CHANGEOUT SCHEDULE ASSIGNED PROTECTION FACTOR ODOR THRESHOLD 97 RESPIRATORS Bioenvironmental Engineering Apprentice IMMEDIATELY DANGEROUS TO HEALTH (IDLH) OXYGEN DEFICIENT ATMOSPHERE Warning Properties SKIN ABSORPTION WARNING PROPERTIES LOWER EXPLOSIVE LIMIT (LEL) CHANGE-OUT SCHEDULE ASSIGNED PROTECTION FACTOR ODOR THRESHOLD “odor, eye irritation, and respiratory irritation” IDLH 13a OXYGEN DEFICIENT ATMOSPHERE SKIN ABSORPTION WARNING PROPERTIES LOWER EXPLOSIVE LIMIT (LEL) DEFINITIONS UNCLASSIFIED//FOR OFFICIAL USE ONLY CHANGEOUT SCHEDULE ASSIGNED PROTECTION FACTOR ODOR THRESHOLD 98 RESPIRATORS Bioenvironmental Engineering Apprentice IMMEDIATELY DANGEROUS TO HEALTH (IDLH) OXYGEN DEFICIENT ATMOSPHERE SKIN ABSORPTION WARNING PROPERTIES LOWER EXPLOSIVE LIMIT (LEL) CHANGE-OUT SCHEDULE ASSIGNED PROTECTION FACTOR ODOR THRESHOLD IDLH 13a OXYGEN DEFICIENT ATMOSPHERE SKIN ABSORPTION WARNING PROPERTIES Lower Explosive Limit “the minimum concentration, as a percentage of flammable gas or vapor mixed in the air that can be ignited” LOWER EXPLOSIVE LIMIT (LEL) DEFINITIONS UNCLASSIFIED//FOR OFFICIAL USE ONLY CHANGEOUT SCHEDULE ASSIGNED PROTECTION FACTOR ODOR THRESHOLD 99 RESPIRATORS Bioenvironmental Engineering Apprentice IMMEDIATELY DANGEROUS TO HEALTH (IDLH) OXYGEN DEFICIENT ATMOSPHERE SKIN ABSORPTION WARNING PROPERTIES LOWER EXPLOSIVE LIMIT (LEL) CHANGE-OUT SCHEDULE ASSIGNED PROTECTION FACTOR ODOR THRESHOLD IDLH 13a OXYGEN DEFICIENT ATMOSPHERE SKIN ABSORPTION WARNING PROPERTIES Assigned Protection Factor “minimum level of respiratory protection provided by a properly functioning respirator, or class of respirators” LOWER EXPLOSIVE LIMIT (LEL) DEFINITIONS UNCLASSIFIED//FOR OFFICIAL USE ONLY CHANGEOUT SCHEDULE ASSIGNED PROTECTION FACTOR ODOR THRESHOLD 100