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-rn-en� n1 lei} �- Table IA Ready Mixed Concrete Company - Bromle3 Lakes Site and North Tower Pit Depletion Analysis (November 2013 - December 2015) Proposed SWSP Operations (all values in acre -feet unless specified) Notes 111 Total surface area of exposed ground water in Bromley Lakes Cell 2, Cell 3, and Lot I and North Tower Pit is conservatively projected to be 48 9 acres ( ?0 6 acres at Bromley Lakes Cell 2, 0 3 acres at Bromley Lakes Cell 3 and Lot 1, and 28 acres at North Tower Pit) [2) Gross evaporation rate equals 44 52 inches (3 71 fl) per year, based upon NOAA Evaporation Atlas Monthl) distribution based upon SB -120 Guidelines [3) Effective precipitation rate equals 700, of total precipitation, based upon average precipitation at the Brighton weather station [41 Net evaporation equals [2] - 131 [5) Historical ET credits at the North Tower Pit from 7 4 acres of pasture gross using ground water at a depth of4 feet (does not include an effective precipitation credit) [6] Net evaporation equals the net evaporation volume minus the historical ET credits, [ 1 ] s [4J 12 - [51 171 Production within a slum wall lined pit (t c Ce113 Lot I or KML l) and outside of a slurry wall lined pit Since the exact timing of production within the slum wall lined pit is not known, projections conservatively show all production outside of a slurry wall lined pit [81 Wash water and aggregate moisture content equals 2 1Y by weight for gravel mined within a slurry wall lined pit and 4 10 by weight for gravel mined outside a slurry wall lined pit 191 Total evaporation and gravel mining depletion equals [6) . [81 [ 101 Lagged site depletion equals the Bromlev Lakes Cell 2, Cell 3, and Lot I and North Tower Pit evaporation and gravel depletion in column [91 lagged over 12 months plus depletions from previous lagging patterns Bromley Lakes Cell 2, Cell a and Lot I & North Tower Pit Exposed Gross Effective Net Historical Net Gravel Production Aggregate Total Ground Evaporation Precipitation Evaporation North Evaporation Within Outside Moisture Evapand Lagged Water Area Rate Rate Rate Tower Pit Lined Pit Lined Pit Content Gravel Depletion (acres) (inches) (inches) (inches) ET Credits (tons) (tons) Depletion Depletion Month I 2 1 [31 141 5 6 1 [71 8 191 1101 Nov 48.9 1.78 0.6 1.2 00 4 7 0 0 0 47 12,2 Dec 2013 48.9 1.34 03 1 1 0 44 0 0 0 44 8,8 Jan 2014 489 1 34 0A 1 0 0 40 0 0 0 4.0 75 Feb 48.9 156 01 1 3 0 51 0 0 0 51 73 Mar 48.9 245 0.8 1.6 0.0 6 5 0 0 0 6.5 7.7 Apr 48.9 4.01 1.3 2 8 0.1 114 0 140,000 4.1 5 5 1 1.8 Mav 48.9 5 34 16 3.8 02 15.3 0 140,000 4 1 :9 .3 15,6 Jun 489 646 1.1 53 05 21 2 0 140,000 4 1 25.3 193 Jul 48.9 6.68 1.1 5.6 0.7 22.1 0 160,000 4.7 26.8 22.5 Aug 489 6.01 1 2 4.8 0.6 18.8 0 160,000 4 7 215 22 1 Sep 48.9 4.45 0,9 3.6 0.4 14.1 0 160,000 43 18 8 19.7 Oct 489 3 12 05 26 0.2 10.5 0 140,000 4 1 14,6 16.8 Nov 489 1 78 0.6 1 2 0.0 4,7 0 0 0 47 11.2 Dec 2014 489 134 03 1.1 0 44 0 0 0 44 82 Jan 2015 48,9 1.34 0.4 1.0 0 40 0 0 0 4.0 7.1 Feb 48.9 1.56 03 1 3 0 5.1 0 0 0 5.1 7.0 Mar 48.9 245 0.8 L6 00 65 0 0 0 6.5 75 Apr 489 4.01 1,2 2.8 01 11 4 0 0 0 11.4 9.7 Ma) 48.9 5 34 1.6 3, 8 02 152 0 0 0 15 2 12.5 Jun 489 6.46 1.1 5.3 05 21 2 0 0 0 21.2 16.3 Jul 48.9 668 1.1 5,6 07 22.1 0 0 0 22.1 18.6 Aug 489 601 1 2 4.8 0.6 18.8 0 0 0 18.8 18.0 Sep 489 445 0.9 3.6 0.4 14.1 0 0 0 14.1 15.5 Oct 48.9 3.12 01 26 02 10.5 0 0 0 10.5 128 Nov 48.9 1 7 06 12 0.0 4,7 0 0 0 4.7 91 Dec 2015 48.9 1.34 0.3 1.1 0 4.4 0 0 0 4A 7,1 Nov 13 -Ju114 Total - 3094 7.3 23.6 1.7 94.5 0 580,000 17,1 111,6 113,2 15 2014-30 Total 44.52 10.0 34.5 2.8 137.9 0 460,000 13.5 151.4 156,7 Au , -Dec 2015 Total.1 1670 3.5 13.2 1 2 52.5 0 0 0 52.5 62.4 Notes 111 Total surface area of exposed ground water in Bromley Lakes Cell 2, Cell 3, and Lot I and North Tower Pit is conservatively projected to be 48 9 acres ( ?0 6 acres at Bromley Lakes Cell 2, 0 3 acres at Bromley Lakes Cell 3 and Lot 1, and 28 acres at North Tower Pit) [2) Gross evaporation rate equals 44 52 inches (3 71 fl) per year, based upon NOAA Evaporation Atlas Monthl) distribution based upon SB -120 Guidelines [3) Effective precipitation rate equals 700, of total precipitation, based upon average precipitation at the Brighton weather station [41 Net evaporation equals [2] - 131 [5) Historical ET credits at the North Tower Pit from 7 4 acres of pasture gross using ground water at a depth of4 feet (does not include an effective precipitation credit) [6] Net evaporation equals the net evaporation volume minus the historical ET credits, [ 1 ] s [4J 12 - [51 171 Production within a slum wall lined pit (t c Ce113 Lot I or KML l) and outside of a slurry wall lined pit Since the exact timing of production within the slum wall lined pit is not known, projections conservatively show all production outside of a slurry wall lined pit [81 Wash water and aggregate moisture content equals 2 1Y by weight for gravel mined within a slurry wall lined pit and 4 10 by weight for gravel mined outside a slurry wall lined pit 191 Total evaporation and gravel mining depletion equals [6) . [81 [ 101 Lagged site depletion equals the Bromlev Lakes Cell 2, Cell 3, and Lot I and North Tower Pit evaporation and gravel depletion in column [91 lagged over 12 months plus depletions from previous lagging patterns