Yes, in order to thoroughly address various building scenarios, the following option have been developed as an addendum by the LEED IEQ Technical Advisory Group, for immediate use by LEED projects. ALTERNATIVE COMPLIANCE OPTION 1: Establish negative pressure in the smoking rooms. a) Prohibit smoking in the building except in designated smoking areas b) Locate any exterior designated smoking areas at least 25 feet away from entries, outdoor air intakes and operable windows. c) Providing one or more designated smoking rooms designed to effectively contain, capture and remove ETS from the building. At a minimum, the smoking room must be directly exhausted to the outdoors with no re-circulation of ETS-containing air to the non-smoking area of the building, and enclosed with impermeable deck-to-deck partitions and operated at a negative pressure compared with the surrounding spaces of at least an average of 5 Pa (0.02 inches of water gauge) and with a minimum of 1 Pa (0.004 inches of water) when the door(s) to the smoking room are closed. d) Performance of the smoking room differential air pressures shall be verified by conducting 15 minutes of measurement, with a minimum of one measurement every 10 seconds, of the differential pressure in the smoking room with respect to each adjacent area and in each adjacent vertical chase with the doors to the smoking room closed. The testing will be conducted with each space configured for worst case conditions of transport of air from the smoking rooms to adjacent spaces. ALTERNATIVE COMPLIANCE OPTION 2 (for residential buildings only): Reduce air leakage between rooms with smoking and non-smoking areas in residential buildings. a) Prohibit smoking in all common areas of the building b) Locate any exterior designated smoking areas at least 25 feet away from entries, outdoor air intakes and operable windows opening to common areas. c) Minimize uncontrolled pathways for ETS transfer between individual residential units by sealing penetrations in walls, ceilings, and floors in the residential units, and by sealing vertical chases adjacent to the units. In addition, all doors in the residential units leading to common hallways shall be weather-stripped to minimize air leakage into the hallway. Acceptable sealing of residential units shall be demonstrated by a blower door test conducted in accordance with ASTM standard E779-99 (Determining Air Leakage Rate by Fan Pressurization) using the progressive Sampling Process for Diagnostic Testing in Figure 4-3 of Section 4.4.4 of the California 2001 Title 24 Low Rise Residential Manual - the Home Energy Rating Systems (HERS) Verification Procedure (on http://www.energy.ca.gov/title24/residential_manual, download Chapter 4). The standard is simply to be used for its sampling methodology - other administrative instructions and forms need not be used. Residential units must demonstrate less than 1.25 square inches leakage area per 100 square feet of enclosure area (i.e. sum of all wall, ceiling, and floor areas). AMENDMENT PER 10/5/04 CREDIT RULING: It is not required to weather-strip the doors connected to common hallways if hallways are positively pressurized with respect to residential units, and the following additional testing is conducted. The pressure difference shall be measured and recorded at least once every 10 seconds for at least 15 minutes; the average recorded pressure difference shall be no less than 5 Pa (0.02 inches of water gauge), with the lowest recorded pressure difference no less than 1 Pa (0.004 inches of water). Tests shall be made with all doors closed and with only those fans operating that are designed to operate continuously; occupant switch controlled fans shall not be operated during the tests. SUBMITTALS: Alter the hardcopy version of Letter Template as appropriate to reflect alternative option 1 or 2 and provide a narrative and summarized test results. Applicable Internationally.