Credits

Delete the paragraph that begins with "The project is a 10 story building..." Add "Example 1." above the example site plan.

Replace Figure 1 with an updated graphic that shows revised numbers in the legend.

In Table 1. Example percentiles of rainfall events, change the first column heading to read "Rainfall amount" and the second column heading to read "Percentile of rainfall events".

Below Table 1 and above the sample narrative, change the paragraphs to read:
"To calculate the runoff volume from 25% of the impervious surfaces for the 95th percentile of storm events (see Calculations), the team adds together all impervious surfaces on the project (existing and proposed), for a total area of 5,000 square feet (464.5 sm). The total impervious area to be managed is 25% of 5,000 square feet (464.5 sm), or 1,250 square feet (116.1 sm).

The team identifies existing GI and LID features that may contribute toward rainwater management and verifies that they manage the required runoff volume on site. In addition to the existing pervious landscaped areas on the project site, the team has identified several conceptual GI and LID measures- bioretention areas, porous paving, a rain garden, and pervious decking- to capture rainwater diverted from impervious surfaces. To ensure that the designed site manages all the required rainwater runoff generated, the team calculates how the GI and LID measures manage the runoff, and it is verified that all required runoff is managed on site."

In the Sample narrative describing GI and LID measures, replace "Taxodium distichum" with "Prunus americana."

Add a section called "Example 2." that reads:
"Example 2.
Example 2 follows a project located in Maryland that attempted Option 1, Percentile of Rainfall Events in the New Construction rating system. The example does not calculate 25% of the impervious surface area on the project. However, it details the iterative rainwater management design process and the calculations used to achieve the credit requirements for the 95th percentile of storm events. It is broken into two modules, both of which are located in the web-based reference guide on the right side of the “Guide” page."

Date
Updated date
Campus Applicable
On
Internationally Applicable
On