Staff Report and WELO Ordinance - StopWaste.Org

Draft 10-13-103. Irrigation scheduling parameters (see subsection 13.25.070(0) of this chapter);4. Landscape and irrigation maintenance schedule (see subsection 13.25.070(D) ofthis chapter).13.25.060 Landscape design documentation package elements.A. Checklist and project information. Each landscape design documentation package shallinclude a checklist signed by a licensed architect or landscape architect on a form approvedby the director and listing and verifying that all elements required by this section have beencompleted and submitted.B. Water budget and hydrozone calculations. The landscape project's maximum appliedwater allowance, hydrozone summary, and estimated applied water use, as described below,shall be submitted with the landscape design documentation package.1. Maximum Applied Water Allowance (MAWA, or water budget). A project's maximumapplied water allowance shall be calculated using the following formula:MAWA = (47.2)(0.62) x [(0.7 x LA) + (0.3 x SLA)]MAWA = Maximum applied water allowance (gallons per year)47.2 = Livermore reference evapotranspiration (Eto) in inches per square foot peryear0.62 = Conversion factor from inches to gallons per square foot0.7 = Evapotranspiration (ET) Adjustment Factor (ETAF)LA = Landscape area (square feet)0.3 = Additional water allowance for special landscape area (SLA)SLA = Landscape area that meets this chapter's definition of special landscapearea (square feet)a. An example calculation of the maximum applied water allowance for ahypothetical total project landscape area of 10,000 square feet, with no speciallandscape area, is below.MAWA = (47.2)(0.62) x [(0.7 x 10,000 sq ft) + 0 sq ft)]= (29.264)(7,000) gallons per year= 204,848 gallons per yearb. An example calculation of the maximum applied water allowance for ahypothetical total project landscape area of 10,000 square feet, including 2,000 squarefeet of special landscape area, is below.MAWA = (47.2)(0.62) x [(0.7 x 10,000 sq ft) + (0.3 x 2,000 sq ft)]= 29.264 x [(0.7 x 10,000 sq ft) + (0.3 x 2,000 sq ft)]= 29.264 x (7,000 + 600) gallons per year= 29.264 x 7,600 gallons per year= 222,406 gallons per yearc. An example calculation of the maximum applied water allowance for ahypothetical total project landscape area of 10,000 square feet, all of which is speciallandscape area, is below.MAWA = (47.2)(0.62) x [(0.7 x 10,000 sq ft) + (0.3 x 10,000 sq ft)]= 29.264 x (7,000 + 3,000) gallons per year= 29.264 x 10,000 gallons per year= 292,640 gallons per year1076