RES 83214 - Laserfiche WebLink

of Santa Rita Road (Area 16, 17, 18 and 19). The study area has been divided up as shown in Figure 2, based primarily on the different land use designation and the point of connection into the trunk line. D. Original Sewer Entitlement Criteria In 1967, William J. Black and Associates designed the trunk line based on the following criteria: 1) Unit loading of 1,120 gpd/Ac. and 2,500 gpd/Ac. average dry weather flow (ADWF) for residential and industria! developments respectively. 2) Peaking factor of 2.0 for peak wet weather flow (PWWF). 3) Infiltration allowance of 600 gpd/Ac. A reproduced sketch from the Black report, Figure I, shows the area in the assessment district and designates the original land use assumptions (residential or industrial). An allowance was made during design to upsize the trunk sewer from the treatment plant to Santa Rita Road for an additional peak capacity reserve of 1.75 MGD with the additional construction cost paid for by DSRSD. Th~s extra capacity could be used to provide services to the area outside of the assessment district boundaries south of Arroyo Mocho and east of Santa Rita Road. Based on Black's calculation sheets, this area was projected for residential land use and totals 615 acres±(~) However, no specific area was designated for allocation of the 1.75 MGD reserve, either inside or outside of the assessment district boundaries. Based on the criteria used in the Black report, the origina! land use, unit loading, and PWWF sewage entitlement of each area were determined and are listed in Table 1. -2- The report to Valley Community Services D~strict, dated September 30, 1969, by Brown and Caldwell, Consulting Engineers, defines this additional area as 500 acres.