California American Water Main Distribution System    
  Quarterly Water Supply Strategy and Budget: April - June 2010    
           
  Proposed Production Values by Source in Acre-Feet    
                     
  SOURCE/USE MONTH   YEAR-TO-DATE    
    Apr-10 May-10 Jun-10   Oct-09 - Feb-10 % of YTD % of Annual Target    
                 
  Source            
  San Clemente Reservoir 0 0 0   0 0.0% 0.0%    
                 
  Carmel Valley Aquifer              
      Upper Subunits 106 0 0   162 3.7% - -    
      Lower Subunits 1,086 998 991   3,737 86.1% 33.1%    
                 
  Seaside Groundwater Basin              
      Coastal Subareas 100 400 275   920 21.2% 25.7%    
      Phase 1 ASR Recovery 0 0 225   0 0.0% 0.0%    
      Sand City Desalination 0 0 0   0 0.0% 0.0%    
  Total 1,292 1,398 1,491   4,819        
                 
  Use              
      Customer Service 1,106 1,398 1,491   4,341 100.0% 29.2%    
      Phase 1 ASR Storage 186 0 0   478        
  Total 1,292 1,398 1,491   4,819    
                     
  Text Box: Notes: 1. The budget reflects "normal" inflow conditions and assumes that the monthly unimpaired inflows at the San Clemente Dam site during the March 2010 - June 2010 period will equal the 50% exceedence flows , i.e., 11,250, 5,610, 2,829 and 1,025 AF, respectively. The exceedence values are based on simulated flows for the 1902-2009 period of record. 2. The annual budget period corresponds to the Water Year, which begins on October 1 and ends on September 30 of the following Calendar Year. 3. Total monthly production for "Customer Service" in CAW's main system was calculated by multiplying total annual production (14,868 AF) times the average percentage of annual production for April, May, and June (7.44%, 9.40%, and 10.03%, respectively). The annual production total was based on the assumption that production from the Coastal Subareas of the Seaside Groundwater Basin would not exceed 3,583 AF and production from Carmel River sources would not exceed 11,285 AF in WY 2010. The average production percentages were based on monthly data for customer service from WY 1998 to 2007. 4. Anticipated production for "Phase 1 ASR Storage" is based on an average diversion rate of approximately 2,100 gallons per minute (gpm) or 9.3 AF per day from CAW's sources in the Carmel River Basin. "Total" monthly CAW "Use" includes water for customer service and water for injection into the Seaside Basin. 5. No surface water diversions from San Clemente Reservoir (SCR) are assumed for this period. SCR is currently full and spilling, and the drawdown season is officially over until May 31, 2010. 6. The production target for CAW's wells in the Upper Subunits of the Carmel Valley Aquifer is set to 106 AF for April, but is set to 0 AF for May and June, based on CAW's goal to avoid use of these wells during this period. However, production could be higher under existing State water rights and interagency operating agreements. 7. The production targets for CAW's wells in the Seaside Coastal Subareas are based on the need for CAW to produce its full Standard Production Allocation during the remainder of WY 2010.