AgdaPkt 2002-11-04 - Laserfiche WebLink

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1. The first approach will be to estimate the landscape area based on the water use records. Dividing total irriganon water use by an assumed depth of irrigation will provide contractor with landscape area estimates. Contractor will view these as placeholder estimates to be improved upon over time as more information is collected. The advantage of this approach is that contractor can develop water budgets immediately for all accounts. 2. The second approach will be for contractor to contact the landscape sites and collect self-reported information on landscape areas (Irvine Ranch Water District made use of this approach). Contractor will send an introduction letter to each site explaining the water use budget program and ask for site-specific information. Contractor will emphasize that water use budgets will be more accurate and useful if the landscape area information is as accurate as possible. The letter package will include a reply card to be mailed to contractor with key information. The key information will include customer landscape area measurements (turf area and other irrigated landscape), contact information (allowing for multiple contacts), and communication preference for water use budgets (mail, fax, email). Within two weeks, contractor will begin making up to three follow-up telephone inquiries to each site. Contractor will ask participating BAWUA members to provide telephone numbers as part of Task 1.1, but contractor recognizes contractor wil! also need to use telephone directories to supplement missing numbers. 3. The third approach will be to integrate information collected from water use surveys, described in Task 2, to improve upon our landscape measurements. Over time, contractor will be able to obtain more and more field observations through this approach. If individual participating BAWUA members desire that all water budgets be based on field measurements of landscape areas, contractor can also complete this task at a negotiated fee not covered here. Task 1.3. Water Budget Calculation Contractor will develop a technical memorandum describing a recommended method for performing water use budget calculation. All budgets will include landscape area measurements and evapotranspiration. Options might include adjustments to budgets for various plant materials (e.g., turf verses other landscaping) and actual rainfall. For water budgets at mixed-use sites, contractor will also establish a procedure for subtracting out estimated indoor water use (e.g., winter water use). Contractor will also establish procedures with working with revolving meter read dates. BAWUA staff will be asked to comment on the technical memorandum and approve a method for calculating water budgets. Contractor will use one water budget calculation for all participating BAWUA members. The actual water budget values, however, will be customized to each site based on landscape area measurements and local weather conditions. ^-2 961514.0 4