Entry Type ID Date Applicable Rating System Primary Credit Inquiry (LIs) Ruling (LIs) Related Addenda/LIs Related Resources Campus Applicable Internationally Applicable Country Applicability Reference Guide (Addenda) Page (Addenda) Location (Addenda) Description of Change (Addenda) "Rating System Correction, Reference Guide Correction" "100000891" "2011-05-09" "New Construction, Commercial Interiors, Schools - New Construction, Retail - New Construction, Retail - Commercial Interiors" "IEQc3.2: Construction IAQ Management Plan-Before Occupancy" "None" "Construction IAQ management plan table addenda 05/09/2011" "Green Building Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition $ Retail Supplement to Green Interior Design and Construction, 2009 edition $ Retail Supplement to Green Building Design and Construction, 2009 edi" "BD+C RG: 461-462, NC RS: 64-65, Schools RS: 67,
Retail-NC RG supp:119-120, Retail-NC RS: 58-59
ID+C RG: 323-324, CI RS: 44-45,
Retail-CI RG supp: 107-108, Retail-CI RS: 41-42,
" "OPTION 2. Air Testing" "(1) In the first sentence of the paragraph, replace the text ""and as additionally detailed in the LEED Reference Guide for Green Building Design and Construction, 2009 Edition"" with ""or the ISO method listed in the table below. Testing must be done in accordance with one standard; project teams may not mix requirements from the EPA Compendium of Methods with ISO""\n\n(2) In the table, insert two columns to the right (refer to supplementary guidance)\n\n(3) In the third bullet item, replace the second sentence (begins with ""For each portion"") with ""The number of sampling locations must include the entire building and all representative situations.""" "Reference Guide Correction" "100001108" "2011-11-01" "New Construction, Schools - New Construction, Core and Shell, Healthcare, Retail - New Construction, Commercial Interiors, Retail - Commercial Interiors" "IEQc3.2: Construction IAQ Management Plan-Before Occupancy" "None" "None" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010 $ Green Interior Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition, updated June 2011" "BD+C RG: 469
ID+C RG: 330" "Definitions" "In alphabetical order, add the following definition for nonoccupied spaces, ""Nonoccupied spaces are defined as spaces designed for equipment and machinery or storage with no human occupancy except for maintenance, repairs, and equipment retrieval.""\n" "Reference Guide Correction" "100000929" "2011-05-09" "New Construction, Schools - New Construction, Core and Shell, Retail - New Construction, Healthcare, Commercial Interiors, Retail - Commercial Interiors" "IEQc3.2: Construction IAQ Management Plan-Before Occupancy" "None" "None" "Green Building Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition" "BD+C RG: 466, ID+C RG: 328" "Air Quality Testing" "In the fourth paragraph, add ""and the ISO methods"" after ""The protocols described in the referenced publication, EPA\'s Compendium of Methods for the Determination of Air Pollutants in Indoor Air,""" "Reference Guide Correction" "100000930" "2011-05-09" "New Construction, Schools - New Construction, Core and Shell, Retail - New Construction, Healthcare, Commercial Interiors, Retail - Commercial Interiors" "IEQc3.2: Construction IAQ Management Plan-Before Occupancy" "None" "None" "Green Building Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition" "BD+C RG: 466, ID+C RG: 328" "Air Quality Testing" "In the fourth paragraph, add in after ""...the greatest presumed contaminant source strength"", ""Determine the number of ventilation systems serving the building. Then, determine if the individual floor plates served by each single ventilation system are larger or smaller than 25,000 square feet. If they are smaller, take at least one sample for every 25,000 square feet, or fraction thereof, served by a single ventilation system. If they are larger, take one sample per floor plate. For example, a 110,000 square foot building with ten 11,000 square foot floors, served by a single ventilation system, needs only five samples - one per 25,000 square feet (or fraction thereof) because each 11,000 foot floor plate is smaller than 25,000 square feet. However, a building with ten 30,000 square foot floors, also served by a single ventilation system, needs ten samples for the building because each 30,000 floor plate is larger than the 25,000 sq ft criterion."" Delete, ""For example"" in the following sentence." "Reference Guide Correction" "100000931" "2011-05-09" "New Construction, Schools - New Construction, Core and Shell, Retail - New Construction, Healthcare, Commercial Interiors, Retail - Commercial Interiors" "IEQc3.2: Construction IAQ Management Plan-Before Occupancy" "None" "None" "Green Building Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition" "BD+C RG: 466, ID+C RG: 328" "Air Quality Testing" "In the fourth paragraph, add in after ""...at normal daily start times and at the minimum outside airflow rate."", ""For projects with standardized identical construction, such as classrooms in a school or multifamily residential units, identify which rooms are identical in construction, finishes, configuration, square footage, and HVAC systems. For these scenarios, project teams can sample the identical spaces by testing one in seven."" " "Reference Guide Correction" "100001091" "2011-11-01" "New Construction, Schools - New Construction, Core and Shell, Healthcare, Retail - New Construction, Commercial Interiors, Retail - Commercial Interiors" "IEQc3.2: Construction IAQ Management Plan-Before Occupancy" "None" "None" "Green Building Design and Construction, 2009 edition $ Green Building Design and Construction, 2009 Edition, updated June 2010 $ Green Interior Design and Construction, 2009 edition $ Green Interior Design and Construction, 2009 edition, updated June 2011" "BD+C RG: 469
ID+C RG: 330" "Definitions" "In alphabetical order, add the following definition for occupied spaces, ""Occupied Spaces are defined as enclosed spaces that can accommodate human activities. Occupied spaces are further classified as regularly occupied or non-regularly occupied spaces based on the duration of the occupancy, individual or multi-occupant based on the quantity of occupants, and densely or non-densely occupied spaces based upon the concentration of occupants in the space.""" "LEED Interpretation" "10097" "2011-08-01" "New Construction, Core and Shell, Schools - New Construction, Retail - New Construction, Healthcare, Commercial Interiors, Retail - Commercial Interiors, Existing Buildings" "IEQc3.2: Construction IAQ Management Plan-Before Occupancy" "Overview: This CIR applies to Option 2- Air Quality Testing. With regards to the process to demonstrate that the maximum TVOC concentrations are below 500 micrograms/cubic meter, this CIR is requesting the acceptance of an alternate unit of measure based on a volumetric reading from an instantaneous, direct reading photoionization detector instrument (PID) using a 10.6 eVolt lamp. This reading would be recorded in a ppb (parts per billion) measurement and then converted to the designated unit of measure called out in the requirements (micrograms/cubic meter) using a conversion factor. This direct reading approach for TVOC will offer a more economical solution for IAQ testing by a factor of approximately two for our ~480,000 SF project. Methodology A conversion factor has been developed (by EH&E in Newton, MA) and is based on a TVOC ""fingerprint"" of 33 individual volatile organic compounds grouped by chemical category, resulting from a technical evaluation of the Building Assessment Survey Evaluation (BASE) data, the EPA TO-15 list of VOC\'s, and other relevant technical data. The EH&E team examined three lists of indoor VOC\'s to develop the TVOC ""fingerprint."" These lists originated the following sources: BASE dataset for commercial buildings, PID-readable chemical compounds, and an EPA approved list of indoor VOC\'s. Seven individual VOC\'s from the BASE data the had the highest reported concentrations and could be measured by a PID formed an initial, preliminary fingerprint. These individual VOC\'s were chemically regrouped (i.e. alcohols, halogenated hydrocarbon, aliphatics, etc.) and the relative group proportions in the fingerprint were compared with the BASE dataset. Based on the EPA guidance and a review of indoor VOC literature, additional VOC\'s not measured in the BASE dataset were considered for inclusion. By mapping additional pollutants from the EPA TO-15 list of VOC\'s, EH&E modified the fingerprint to represent new or existing buildings. The expanded list of compounds included all BASE compounds that were both on the EPA TO-15 list and measurable by the PID. This ""fingerprint"" is based on the following list of chemicals, sorted by their group, their average group molecular weight (AGMV), the % in BASE data, and specific compounds in fingerprint: Format given in following order: Group/AGMW/% in BASE/Compounds in Fingerprint Aldehydes/44.06/12%/Acetaldehyde Alkanes & alkenes/113.6/8%/n-undecane; n-decane; Nonane; Octane; n-hexane; 1,3 butadiene Aromatics/110.5/14%/d-limonene; a-pinene; Naphthalene; o-xylene; m- & p-xylenes; Ethylbenzene; Styrene; Toluene; Benzene Halogenated Hydrocarbons/130/15%/1,2 -dbromoethane; 1,2, 4-trichlorobenzene; 1, 2, -dichlorobenzene; Trichlorobenzene; 1,3,5 -trimethylbenzene; Chlorobenzene; 1,1 -dichloroethene; Vinyl chloride Alcohols/78.5/31%/2 -butoxyethanol; Phenol; 1 -butanol Ketones/58.1/15%/Acetone Other(e.g. acetates,sulfides, ethers, etc.)/92.55/5%/Butyl acetate; Dimethyl disulfide; Ethyl acetate; Carbon disulfide; t-butyl methyl ether Conversion Factor In order to convert a PID reading from part per billion (ppb) to a mass-based equivalent in micrograms/cubic meter, the PID value is multiplied by a derived conversion factor, MCF, defined below as the product of two correction factors, CF-1 and CF-2. For the TVOC fingerprint listed above, the formula is MCF = CF1 * CF2, where MCF = 2.70 Mass Conversion Factor CF1 = 0.88 Correction for predicted ppb PID reading to ""actual"" ppb reading, based on isobutylene equivalents, and CF2 = 3.07 Correction for ""actual"" ppb to micrograms/cubic meter equivalent, based on the chemical distribution of the mixture and the average molecular weight. Summary The acceptance of this CIR would provide a lower cost test for TVOCs, including the use of both hand held PID-TVOC direct read instruments and permanently installed PID-TVOC direct read instruments." "**Update January 1, 2014: This Interpretation is no longer valid. See LI 2467.\n\n **Update October 1, 2013 The applicant is requesting approval for use of a photoionization detector instrument (PID) to measure TVOC concentrations during air quality testing. The proposed alternative for testing of TVOC using a PID is not an approved method in the United States Environmental Protection Agency Compendium of Methods for the Determination of Air Pollutants in Indoor Air which are the methods required for this credit. The IAQ testing must be conducted according to the test procedure outlined in the referenced standard using an approved indoor TVOC measurement device, which is either Method IP-1A, Stainless Steel Canister, or IP-1B, Solid Adsorbent Tubes. Both of these methods utilize GC/MS analyses to determine the concentrations of the collected VOC\'s. Most laboratories will calculate the total concentration of VOC\'s (TVOC) according to a toluene equivalent mass from the Total Ion Chromatogram (not just the peaks of EPA TO-15 compounds, but the integrated area of the peaks from all compounds). This method is discussed in the California Department of Health Services (CDHS) Standard Practice. http://www.ciwmb.ca.gov/greenbuilding/Specs/Section01350 First of all PID analyses miss many of the common indoor VOC\'s such as aldehydes and aliphatics and has a poor response factor (i.e. and thus large uncertainty) for common indoor VOC\'s such as alcohols. The ""fingerprint"" method proposed for calibration of the PID is fundamentally flawed in that it uses a calibration based upon an assumed fixed percentage of mass of VOC\'s from seven different groups of VOC\'s while the actual mass percentage of VOC\'s can vary widely from building to building. The errors associated with the ""fingerprint"" method could be easily demonstrated by simultaneously measuring the TVOC concentration with a PID and either method IP-1A or IP-1B in a number of buildings. Such a comparison was conspicuously missing from the EH&E report ""Development of a Method to Convert Total Volatile Organic Compound Measurements in Buildings to Equivalent Mass Based Units"", although the report did contain numerous caveats regarding the accuracy of the ""fingerprint method"" including limitations related to the ""Representativeness of TVOC List"" and the ""Variability by Building Type"". Additionally, the LEED-NC v2.2 Reference Guide states that samples must be collected over a minimum 4-hour period; instantaneous TVOC measurements do not satisfy this requirement.Applicable internationally." "None" "None" "X" "LEED Interpretation" "10222" "2012-07-01" "New Construction, Commercial Interiors, Retail - Commercial Interiors, Healthcare, Retail - New Construction" "IEQc3.2: Construction IAQ Management Plan-Before Occupancy" "The project is a training complex in Oklahoma. The new facilities consist of two new B/COF buildings. We intend to conduct baseline IAQ testing, as outlined in option 2. We would like clarification in determining the number of sampling locations within the buildings. The two B/COF buildings each have three floors and encompass approximately 93,000 square feet. For these two buildings, three Dedicated Outside Air Systems (DOAUs) distribute outside air throughout each B/COF building; however, separate Water Source Heat Pumps (WHPs) condition the outside air delivered to each room. Each B/COF building contains 150 residential barracks units which each have a separate WHP. In addition, each B/COF building has identical rooms whose HVAC needs are provided by identical WHP units (e.g., identical offices, identical lounges, and identical learning centers). Following the guidance provided by the LEED for New Construction Version 2009 Reference Guide, each B/COF building would require 184 sampling locations. We propose the following alternative compliance path for multi-family, residential projects with similar rooms and residential units: Per the guidance provided by LI 1740 dated 05/30/2007 , If the delivery of outside air on an air change per hour basis and the materials in a ventilation zone are identical (e.g. a specific type of hotel room, or apartment/condominium with separate ventilation systems) a HERS random sampling plan may be employed (i.e. random 1 in 7 selection from each model of room). In addition, for buildings with large numbers of identical rooms each with separate ventilation systems, a minimum of 3 rooms for a particular model of room shall be deemed sufficient. If one or more of the three measurements made per model room fail, then an additional three of that type guest room are tested. All failed rooms will be re-tested following flushing with outside air. Furthermore, per the guidance provided by LI 5209 dated 04/21/2009, an acceptable strategy for each individual unit type configuration, is a minimum of 3 samples are taken for each identical unit type. (Note: In this case, the minimum of 3 samples refers to three Indoor Air Quality (IAQ) sampling locations for each similar unit type.) Implementing the minimum of three (3) rooms for a particular model of room, we estimate that a total of twenty-seven (27) sample sets will be required in each B/COF building. Per this methodology, identical Dwelling Units will be grouped together and a minimum of 3 sampling locations will be included in the Indoor Air Quality Testing. In the same manner, similar room types with identical ventilation units and rates (i.e. computer learning rooms) will form a separate group upon which a minimum 3 sampling locations will be included. As stated above, this methodology is based on the LI 1740 dated 5/30/2007 for LEED NCv2.2 and LI 5209 dated 04/21/2009. For this project, all Dwelling Units are identical. In each B/COF building, 6 WHP\'s serve 6 identical Dwelling Units and the corridors on the Northeast and Northwest corners of each floor. Although corridors are not considered occupied space per ASHRAE 62.1-2007, the delivery of outside air on an air change per hour basis and the materials in these ventilation zones differ from the remaining Dwelling Units. Per this methodology, these 6 Dwelling Units will be grouped together and 3 sampling locations will be included in the Indoor Air Quality Testing. The remaining 144 identical Dwelling Units are served by separate identical WHP\'s and 3 sampling locations will be included. The remaining groups are served by identical WHP\'s per group, and thus will include 3 samples each for the identical Drill Instructor Rooms (1 per floor), identical Laundry/Vending Rooms (1 per floor), identical Day Rooms (1 per floor), and identical Computer Learning Rooms (1 per floor) for a total of 12 sampling locations. For zones without identical rooms each served with separate ventilation systems, the original guidance will be followed, and the number of sampling locations for each separate ventilation system will not be less than 1 per 25,000 square feet or for each contiguous floor area, whichever is larger. Thus, an additional 9 sampling locations will be included. Please confirm if this alternative compliance path meets the credit intent. If this is not acceptable, please clarify how the IAQ testing option may be applied to projects with identical residential units or rooms that have separate ventilation units but equal ventilation rates based on air changes per hour and identical materials within each unit or room. " "The project is inquiring if the proposed sampling for two barrack buildings, each with 150 residential barrack units, offices, lounges, and learning centers satisfies IEQc3.2, Construction IAQ Plan Before Occupancy. As stated in LEED Interpretation 1740, a sampling approach according to HERS guidelines of one in seven of identical spaces is acceptable. Therefore each sample group would consist of identical spaces, one out of every seven of which are to be tested. The LEED Interpretation also allows for a minimum of 3 tests in each sample group, if there are more than 21 identical spaces in a sample group. For example, one sample group might have 1 unit/space in it and another might have 50 identical unit/spaces in it. You would test one in the first sample group, and a minimum of three in the second sample group. Without more information on the number of identical spaces in each sample group, it is unclear if the proposed option completely satisfies the requirements. Note that HERS has specific guidelines in case of test failures in order to continue with a sampling approach. The sampling plan developed for the project, must observe HERS guidelines on what to do in the event of a test failure." "1740, 5209" "None" "LEED Interpretation" "1740" "2007-05-30" "New Construction, Commercial Interiors, Schools - New Construction, Retail - New Construction, Retail - Commercial Interiors, Healthcare" "IEQc3.2: Construction IAQ Management Plan-Before Occupancy" "We have a ~100,000 square foot 3-pointed T-shaped building with five floors. On the first floor there is an additional 7,800 sq. ft single story extension that will be used for a cafeteria and kitchen. The other sections are approximately 5,500 sq. ft. on each of floors 1 - 5 for a total of approximately 16,500 sq. ft. per floor. Each section is attached to a core and has similar furnishings and usage including both open and private offices and conference/training rooms with the following exceptions: the first floor includes an entrance lobby and the second floor includes a movable filing area and a server room. The HVAC system utilizes variable air volume boxes with induction fans. Separate air handling units (AHUs) in each section on each floor serve the three main vertical sections. There is one outdoor air fan on the roof above each section (3 total) which supply outside air down to the respective sections\' five AHUs. There are an additional nine ceiling-mounted AHUs for the cafeteria and one unit for the kitchen. These ten units are supplied with outside air through one rooftop intake fan that is ducted to each unit. In summary, there are fifteen main AHUs, nine cafeteria AHUs, and one kitchen AHU (25 total). If one were to interpret a ""separate ventilation system"" as each individual AHU, this would infer 25 sampling locations, which is pointlessly excessive and costly for a 100,000 square foot building. It risks returning to the days when no IAQ testing was done because there was no cost effective protocol in the LEED credit system. We see no technical reason why the criterion should be based on individual AHUs. Identical AHUs used to serve multiple zones all deliver the same volume of outside air per person per ASHRAE requirements for the respective space use. The volume of outside air in supply air varies with time, not by zone i.e. with variations in outside air temperature. The point sources of indoor air pollutants in and around the building and its mechanical system, and their treatment, will be independent of the number of air handling units used to serve the building. If a building designer uses one four-ton AHU vs. four identical one-ton AHUs, what will sampling in four locations achieve? Due to the unique T-shaped design, the building core breaks what would have been contiguous floors into separate areas. While these areas are not physically contiguous, they have similar furnishings and space usages, which present similar indoor pollutants. In order to re-establish an economically and logistically sound method for wide use across multiple building formats, we have selected this project to seek clarification on the following terms: 1) ""separate ventilation system"" in a building with numerous AHUs and 2) ""contiguous floor area"" in unusually shaped buildings. We propose that for each portion of the building served by a separate ventilation system, the number of sampling points must not be less than one per 25,000 square feet, or for each contiguous floor area, whichever is larger, with the following clarifications: 1) Allow contiguous floor area to be defined as areas with similar furnishings and space usage, even if the space crosses a building core (but not up or down a floor). 2) Require at least one sample in each building use location, i.e.. cafeteria vs. office vs. warehouse (server rooms are not included since they are not regularly occupied). 3) Allow ""separate ventilation system"" to be defined as fundamentally different HVAC designs, i.e.. heat pumps vs. built-up units vs. TDV (underfloor) vs. overhead mixing. Following the above protocol, we propose to sample six locations in this building: 1st Floor Cafeteria 1st Floor Lobby 2nd Floor Filing Area 3rd Floor Private Office 4th Floor Training Room 5th Floor Open Office (A ""separate ventilation system"" could be interpreted as AHUs served by a common outside air source. This would require excessive sampling in buildings equipped with small rooftop package units and thus is not practical.)" "Per the LEED-NCv2.2 requirements, the number of sampling sites would be one per each of the separate ventilation systems. The NCv2.2. requirement for one sampling location in ""each portion of a building served by a separate ventilation system"" is based upon the fact that the ventilation systems define a distinct mixed volume of indoor air as tested under the required minimum outside air percentage mode. Since there may be expected to be variations in the indoor air concentrations in this mixed zone, there is a further requirement that the area in the zone with the least ventilation and greatest presumed contaminant source strength be tested. The contaminants in this mixed volume of air are determined by the emissions from the materials in the air space and the amount of outside air being delivered to the air space. As both the materials and the outside air delivery rates in different ventilation system zones can vary, separate air contaminant measurements are required for each ventilation system zone. If the delivery of outside air on an air change per hour basis and the materials in a ventilation zone are identical (e.g. a specific type of hotel room, or apartment/condominium with separate ventilation systems) a HERS random sampling plan may be employed (i.e. random 1 in 7 selection from each model of room). In addition, for buildings with large numbers of identical rooms each with separate ventilation systems, a minimum of 3 rooms for a particular model of room shall be deemed sufficient. If one or more of the three measurements made per model room fail than an additional three of that type guest room be tested. All failed rooms will be re-tested following flushing with outside air. In this specific case, if the cafeteria space is one undivided open space with identical (not just similar) materials throughout the space and the delivery of outside air on an air change per hour basis is identical for each system, then a HERS random air sampling of 1 in 7 of the 9 ventilation system zones is acceptable. Thus, 2 test locations are required for the cafeteria space (i.e. randomly select 2 of the 9 ventilation system zones) and these locations shall include the area with the least ventilation and greatest presumed contaminant source strength in each zone. The kitchen, which is both a separate space with a separate ventilation system and different materials requires a second test location. Again, to include the area with the least ventilation and greatest presumed contaminant source strength is acceptable. The five floors of the main building with three separate ventilation systems that serve separate spaces with different materials requires one sampling location per ventilation system, again to include the area with the least ventilation and greatest presumed contaminant source strength is acceptable. Thus, a total of 18 test locations are required, two in the cafeteria, one in the kitchen and 15 in the main building." "10222" "None" "LEED Interpretation" "1902" "2007-09-18" "New Construction, Commercial Interiors, Schools - New Construction" "IEQc3.2: Construction IAQ Management Plan-Before Occupancy" "This CIR is submitted in relation to the implementation of LEED NC 2.2 Credit EQ 3.2 as it relates to a Data Center facility. Based upon our review of the existing CIRs there does appear to be a related CIR raised under the NC 2.1 program dated 1/18/2007, however it is not clear as to whether this ruling is applicable to NC 2.2. This previous NC2.1 CIR ruled that when applying the 14,000 ft3 / ft2 alternate approach (which is in effect the NC 2.2 credit criteria), that In order to achieve EQ credit 3.2, all ""Occupied spaces"" as defined in ASHRAE 62.1-2004 must be adequately flushed out. Spaces not classified as ""Occupied spaces"" under ASHRAE 62.1-2004 are not covered by this credit. Further research has found that the ASHRAE 62.1:2004 definition of an ""Occupied Space"" is ""An enclosed space intended for human activities, excluding those spaces intended primarily for other purposes, such as storage rooms and equipment rooms, that are only occupied occasionally and for short periods of time"" Based upon the above information, we are seeking confirmation that the following areas within a datacenter facility are not classed as ""occupied space"" per the AHSRAE 62.1:2004 definition - due to their occasional and short occupancy periods - and as such are not covered by this credit and consequently can be omitted from the 14,000 cfm / sq ft flush out calculation. o Server Rooms o UPS / Battery Rooms o Mechanical Rooms o Electrical Rooms To achieve credit EQ3.2 we therefore propose to undertake a flush out of all offices, circulation space and other areas that fall under the ASHRAE 62.1:2004 definition of an ""Occupied Space"", based upon our assumption stated above. Please confirm that this strategy for achieving credit EQ3.2 is acceptable." "The inquiry is asking whether the requirements of EQc3.2 (construction IAQ management, prior to occupancy) apply to areas that cannot be considered as occupiable space (per ASHRAE Standard 62.1-2004 definition). The requirements of EQc3.2, namely flush-out with 14,000 cfm/sq ft of outside air, apply to all spaces that are within the building envelope; the credit does not differentiate between occupiable and non-occupied spaces.\n\n **Update October 1, 2013: Applicable credits were updated." "None" "None" "X" "LEED Interpretation" "5209" "2009-04-21" "New Construction, Schools - New Construction, Commercial Interiors, Retail - New Construction, Retail - Commercial Interiors, Healthcare" "IEQc3.2: Construction IAQ Management Plan-Before Occupancy" "We are requesting clarification on the number and location of IAQ testing measurements for a 140,000 SF university residence hall project. Based on guidance from previous CIRs for other buildings with large numbers of like spaces, we propose the IAQ testing approach described below: Corridors: The corridors are uninterrupted on each floor and are served by seven 100% outside-air Roof Top Units spaced along the building. Each RTU serves the corridor segments of the floors beneath it. (RTU 1 serves the West section of the corridors on floors 1-5, etc.) The corridors on each floor are identical in terms of materials, finish, usage and, for the most part, configuration. We propose to sample one location for each corridor RTU, with at least one test per floor. Any unique configurations will also be tested. (7 tests) Nonresidential spaces: Two additional RTUs serve several first floor common spaces: RTU 8 serves a large conference room; RTU 9 serves several other common spaces (e.g. building lobby and reception areas). Each RTU serves less than 25,000 SF. There are 18 additional spaces - lounges and private offices - which rely primarily on individual PTACs and operable windows for outdoor air. Many of these spaces are identical (e.g. Five identical lounges, one on each floor). For the first floor spaces served by RTUs, we propose to test 1 location per RTU in keeping with the credit requirements. For the remaining 18 spaces which rely primarily on PTACs and operable windows for outdoor air, we propose to test each unique space. For the identical spaces, we propose to test 1 in 7 of each type. (11 tests total) Residential: The majority of the building comprises 144 residential units, all of which are identical in terms of finish, materials and usage. There are 15 different unit types total. Five of the unit types are single occupancy apartments, accounting for 12 units; with no more than 5 of each apartment type. The 10 remaining unit types are dorm suites, accounting for 132 units. Each type of dorm suite is a different configuration of the same elements: a common living/kitchen space, a bathroom, and single or double bedrooms. (Unit type 4A has a living/kitchen area, a bathroom and 4 single bedrooms; unit type 4B has a living/kitchen area, bathroom, and 2 double bedrooms; etc.) Each bedroom and living/kitchen space has a dedicated PTAC, and relies primarily on the PTAC and operable windows for outdoor air. For the 12 single occupancy apartment units (representing 5 unit types), we propose to test one of each unit type. For the 132 dorm suites (representing 10 unit types), we propose to test at least 3 examples of each identical space that composes the suites. That is, we will test 3 single bedrooms, 3 double bedrooms, 3 living/kitchen areas and 3 bathrooms at minimum. These tests will be selected such that there is at least one test in each unit type and at least one test per floor. (17 tests total) All test locations will be selected according to the guidance provided in the reference guide (3-6 ft from floor, in the location anticipated to have the least ventilation and highest presumed source strength, etc.). We feel that providing 35 tests is more than adequate for a 140,000 SF building. Please indicate whether this approach will meet the credit intent or provide additional guidance if it will not." "The applicant is requesting clarification to confirm if the proposed sampling locations are acceptable for each space type given the specific project information provided. It should be noted that although a random sampling plan may be employed per CIR Ruling dated 5/30/2007, contiguous areas served by multiple RTU units, such as the corridors, are considered separate ventilation zones. The proposed sampling locations, by space type, are considered as follows: Corridors: Each of the 5 contiguous corridors is served by 7 separate RTU units for a total of 35 similar ventilation zones. The sampling strategy of insuring that each RTU and each floor will be represented, along with any unique configuration areas, is consistent with the allowable random sampling strategy and does not exceed 7 locations per sample. Therefore 7 sampling locations are acceptable for the corridor areas. Non-Residential: For the first floor RTU unit 8, serving a single space with an area less than 25,000 sq.ft., a single sampling location is acceptable. For the first floor RTU unit 9, serving multiple spaces with a combined area less than 25,000 sq.ft., a single sampling location is acceptable provided the areas represent a single ventilation zone. If the areas served by RTU unit 9 are not a single ventilation zone, each area must be sampled individually. It should be noted that if 2 or more of the areas served by RTU unit 9 are identical, a sampling strategy may be employed provided that no greater than 7 identical locations are represented by a single sample. For the remaining 18 spaces, the proposed sampling strategy is acceptable as each unique space is sampled and no greater than 7 identical locations are represented by a single sample. Residential: For the 12 single occupancy apartment units, it is acceptable to employ a sampling strategy of one sample per unit type, as no greater than 7 identical units will be represented by a single sample. For the 132 dorm suites, it is not clear from the description that no greater than 7 identical units will be represented by a single sample and it does not appear that a minimum of 3 samples will be taken for each identical configuration. Therefore, this strategy is only acceptable if no greater than 7 identical units are represented by a single sample or if a minimum of 3 samples are taken for each identical unit type. It should be noted that although 3 samples are proposed for each component part of these units, the mixing of air may be variable depending on the specific configuration of spaces within the unit. Therefore, each of the 10 unit type configurations must be considered individually when determining sampling strategies." "10222" "None" "LEED Interpretation" "5217" "2009-06-04" "New Construction, Commercial Interiors, Schools - New Construction" "IEQc3.2: Construction IAQ Management Plan-Before Occupancy" "The total area 79,650 SF of the new building is divided as indicated below. 20,940 SF - Data Center with raised floor 13,200 SF - office space, loading, storage and support areas 45, 510 SF - MEP spaces --79,650 SF The data center (20,940 SF) and MEP spaces (45,510 SF) are designed with minimal outside air, which is not occupied by the office staff. The question is: would Performing a flush-out only in office spaces (20,940 SF), excluding the Data Center and MEP spaces shall meet LEED NC 2.2 Credit 3.2 requirements under flush out option? This question is being asked on the basis that only office spaces are truly occupied by the personnel, and data center and MEP spaces are not." "The applicant is asking if the flush out procedure needs to be performed in unoccupied areas within the building in order to comply with the credit requirements. All spaces that are “occupiable,” as defined by ASHRAE 62.1, must be flushed out. ASHRAE’s definition is “an enclosed space intended for human activities, excluding those spaces intended primarily for other purposes, such as storage rooms and equipment rooms, that are only occupied occasionally and for short periods of time.” Typical MEP spaces would not be considered to be occupiable. However, data centers would be considered occupiable since personnel are present more than “occasionally and for short periods of time. **Update October 1, 2013: Applicable credits have been updated." "None" "None" "X" "LEED Interpretation" "5979" "2004-03-08" "New Construction, Core and Shell, Schools - New Construction, Retail - New Construction, Healthcare" "IEQc3.2: Construction IAQ Management Plan-Before Occupancy" "This question concerns allowable contactor activities before, during, and after the required two week flushout period. Your response of 10/17/2001 on this credit seems to imply the following sequence of events: 1. Complete punch list 2. Perform flushout 3. Install furniture The implied reason for this is that the furniture will become a ""sink"" for indoor pollutants, if installed before the flushout. In our project, the contractor\'s work includes furniture installation. Furthermore, they expect to do touch up painting after move-in, since the movers are likely to cause some damage to building finishes. Following the logic of the 10/17/01 decision, this would be prohibited, as the touch up painting would have to be performed before the flushout, but the furniture move-in, which created the need for touch up, could not be allowed until after flushout. On the other hand, it could be argued that the furniture should be moved in before flushout, to give the furniture an opportunity to ""off gas"". Is the time of furniture move-in critical, relative to the flushout period? If so, when should it occur? Can any activities, such as touch up painting, be performed after the flushout?" "The sequence of final construction activities will naturally vary between contractors and depend on the contractor\'s scope of work. It is most critical that the flush-out be conducted AFTER substantial completion of construction (including major IEQ-relevant punch list items) and prior to occupancy. As stated in the EQc3.2 ruling dated 10/17/2001, it is recommended that the flush-out occur prior to furniture installation (with the exception of non-porous items). Touch-up painting resulting from furniture move-in should not be a significant source of indoor air contamination in comparison to the VOC and particulate emissions from the building materials and construction process and need not be completed prior to flush-out. Applicable internationally.\n\nUPDATE 10/1/12: Now applicable to 2009 versions of the rating system and not applicable to older versions." "1955, 6017, 5598" "None" "X"