ID#2308 made on
SSc4 - Alternative commuting transportation
LEED O+M: Existing Buildings
This CIR is requesting additional guidance on the surveying requirements for SSc4: Alternative Commuting Transportation. Our project is the largest building in the city, with 3,500 building occupants...
This CIR is requesting additional guidance on the surveying requirements for SSc4: Alternative Commuting Transportation. Our project is the largest building in the city, with 3,500 building occupants and is located within a densely occupied urban environment with minimal parking capacity. The only parking owned by the project is 209 spaces of under-building parking for the use of paying building occupants and complimentary parking exclusive visitors to the penthouse restaurant. Street parking is limited as the building is located on the downtown light-rail line, where the line prohibits parking on its path. Additionally, the building is located by the city's public transportation centers and within areas of high bicycle commuting in a Platinum rated bicycling city. The issue with our project is not getting individuals to use alternative forms of commuting, but rather in receiving a high non-response rate from building occupants for the transportation survey. As listed in the LEED EB O&M Submittal Template, "Survey non-responders are considered conventional commuters unless the survey response rate is 80% or higher. For response rates of 80% or more, the survey results may be extrapolated to the non-responders." Our project performed a one-time survey pursuant to the survey in SCAQMD Rule 2202. The survey was distributed to 1,500 of the 3,500 building occupants with a $5.00 incentive for survey completion. Of the 1,500 surveys distributed, we received 750 responses that demonstrated 89% of surveyed individuals utilized some form of alternative transportation. With the requirements for non-responders, this percentage would then be dropped down to 44% and the project would lose two points due to issues outside of management's control. In order to receive accurate survey responses, we would like to receive further guidance on the survey requirements for projects such as this one. As listed under LEED-EB O&M EQc2.1: Occupant Comfort, Occupant Survey, "the survey must be collected from a representative sample of building occupants making up at least 30% of the total occupants." Additionally, according to LEED NCv2.2, EQc7.2: Thermal Comfort Monitoring, the survey must be anonymous and "may be administered in person, over the phone, over networked computers, or on paper but should be consistently applied and available for participation by all regular occupants." We would like to apply these surveying requirements to SSc4 as well. In order to ensure that we are receiving a representative sample of building occupants, we would like to perform in-person surveying of building occupants using the SCAQMD Rule 2202 survey format. The surveyors will be located within the centrally-located elevators to ensure occupants entering from all doors and from the garage are being surveyed. Surveys will be captured during peak commuting windows (7:00am - 10:00am, 4:00pm - 6:00pm) for at least one day, until at least 30% of building occupants are surveyed without repetition. To ensure that this method meets the intent of the credit, all persons who do not participate will be considered "non-responders."
Performing an in-person survey of building occupants using the SCAQMD Rule 2202 survey format is an appropriate mechanism for determining alternative transportation use rates. Option 2 listed in the EB: O&M Reference Guide (First Edition, page 65) allows for a random statistical approach for surveying occupants and extrapolating the results to the entire building population. The sampling methodology must be documented and be systematic and representative of the entire building population. The required minimum sampling size is determined by the following formula: Required random sampling size = (# of regular occupants x 752) / (# of regular occupants + 752) 1. The proposed percentage of surveyed occupants for the project would be sufficient. Non-respondents to the survey would be considered conventional single-occupancy vehicle users. Please see the Reference Guide for details and examples of this survey method. Applicable Internationally.
Related Addenda (Corrections & Interpretations)