Our project is a 1.2 million SF science building renovation and expansion for an urban university campus. The program consists of research and teaching laboratories, lab support areas, offices, conference rooms, lecture halls, classrooms, libraries, food service, and public areas. We would like an interpretation on some hardscape materials on our site, dark granite under water and gray concrete. A water feature adjacent to the main entry for this project consists of various waterfalls over granite stone. The granite is dark and does not independently meet the albedo of 0.30. However, running water plays a significant role in lowering not only the adjacent ambient air temperature but also the thermal absorption of the granite. Hypothetically, if the outside air temperature on a sunny day is 100 degrees, then dry granite might be around 110-115 degrees, reflecting considerable heat. However, granite under water would have a lower temperature. The use of water in roof ponds, pools, fountains, cascades, waterfalls, etc. for the purpose of cooling is widely accepted. However, the hard research does not exist for the effect of water on the reflectivity and absorption of granite. If a shaded environment is typically the equivalent of 10 degrees cooler than a non-shaded area, does the water/granite combination appear to be equivalent to a shaded area? Can we include the water feature area SF under the shaded category to factor solar heat reduction into the calculations? We would like a further interpretation with regard to our pedestrian walkways to confirm we can use gray concrete. A 6/27/2003 Ruling states that "for the concrete portion of the site, it is acceptable to use the reflectivity rate for new concrete on this credit, as this will meet the intent of the credit at the time of construction. Reflectance level of applicable materials must be adequately documented to earn this credit." Is it acceptable to use the reflectance documentation from the American Concrete Paving Association, stating that new standard gray Portland cement concrete has a reflectivity between 0.35 and 0.40, to meet the requirements of this credit? Or is an actual ASTM E903 lab test on the actual mix to be used required for the project?