To make it easier to find these chapter updates, the chapter date column has been added to. This new process allows risk assessors to get the latest information as new data becomes available. Tables must contain the same number of columns in each row and rows in each column The latest edition of the Exposure Factors Handbook was released in 2011, but since October 2017, EPA has begun to release chapter updates individually. TR must be a child of Table, THead, TBody, or TFoot Other elements that require alternate text Tab order is consistent with structure orderĪlternate text must be associated with some contentĪlternate text should not hide annotation The checker found no problems in this document.Īccessibility permission flag must be setĭocument structure provides a logical reading order Recommendations for controlling diesel exhaust emissions include installing engine exhaust filters and applying local tailpipe exhaust ventilation and dilution ventilation.Acrobat Accessibility Report Accessibility Report Filename: Appendix Z DRAFT 04-07-15.pdf Report created by: Organization: The exhausts can then enter the living quarters. The author concludes that when diesel powered equipment leaves or returns to an engine house, particulate diesel exhausts are produced inside the apparatus bay. Representative data for an engine house built in 1897 indicated elemental carbon concentrations in the kitchen, dormitory, and television room measured on the first night to be 10, 52, and 34microg/m3, respectively. atmosphere at a height well above the outdoor breathing. Significant exposures were measured in the kitchens, dormitories, and other areas away from the apparatus bays. subslab soil gas sampling, indoor air sampling, and supplemental tools such as flux chambers. The highest exposures were generally measured in the apparatus bays. Area air elemental carbon concentrations measured in the engine houses on the first and second nights varied from 10 to 823 and 2.2 to 327microg/m3, respectively. Samples passed through a 2.5 mm mesh size sieve and the retained fraction (>2.5 mm) visually inspected to verify plastics presence. Samples should be collected in the breathing zone, approximately 3 to 5 feet off. The elemental carbon concentrations measured outside of the three engine houses on the two nights averaged 12 and 8.4microg/m3, respectively. Active Sampling: A pump for drawing indoor air (8 L/min) and quartz fiber GF/A Whatman filters (1.6 mm, 47 mm) for sample collection (25 m 3) from two apartments and an office. As with soil gas or indoor air samples, enough measurements should be. Personal air elemental carbon exposures measured on the first and second nights varied from 24 to 71 and 14 to 79 micrograms per cubic meter (microg/m3), respectively. The samples were analyzed for elemental carbon (7440440), which was used as a surrogate for particulate diesel exhaust, by a thermal optical method. Ambient air samples should be collected at breathing zone height (if. Samples of air outside the engine houses were also collected. VI evaluation when sampling and analysis of indoor air or soil gas is performed or. Samples were not collected on the vehicles when they were away from the firehouses responding to a call. fans in kitchens or shop areas (see Figure 7-1 see also USEPA 2004e, ITRC 2007, USEPA 2012d). Personal and area air samples were collected on two nights in the kitchens, apparatus bays, dormitories, and other sites in the engine houses when the vehicles' engines were first started and when they began backing into the engine houses upon their return. 7.7.1 Determining When to Collect Indoor Air Samples. The evaluation was performed in response to a request by the department and local firefighters unit to evaluate potential exposure to diesel exhaust emissions from the fire apparatus. ![]() 6.4.1 Indoor Air Sampling Indoor air sampling results: are needed to assess the presence and level of risk posed by vapor-forming chemicals in indoor air (see Sections 6.3.4 and 7.4) and can be useful in diagnosing whether vapor intrusion is. The results of a NIOSH health hazard evaluation of diesel exhaust exposures at three fire stations were discussed. Several rounds of sampling are often needed to develop an understanding of temporal variability.
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