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City of Middleton Stormwater Quality Plan TABLE 2- Structural BMP Alternatives Ranked by TSS Removed per $1000 BMP Drainage Area (Acres) Direct Watershed TSS Load Received (tons/yr) Stand Alone BMP Removal Efficiency1 Stand Alone Street Sweeping Removal Efficiency2 Net BMP Removal Efficiency After Street Sweeping3 TSS Load Trapped by BMP after Street Sweeping (tons/yr) 40% TSS Removal Area Overall Reduction Construction Cost Land Purchase Total Cost Amount TSS Removed per $1000 (lbs/$1000) BMP Alternative Ranking 200.01 119 17.5 80.5% 2.5% 78.0% 13.6 2.2% $153,911 $0 $153,911 177.2 #1 300.01 75 12.6 61.2% 2.5% 58.7% 7.4 1.2% $72,870 $51,480 $124,350 119.0 #2 100.01 11783.8 101.9 48.2% 2.5% 45.7% 45.7 7.5% $877,728 $0 $877,728 104.1 #3 1200.01 25.8 3.2 37.5% 2.5% 35.0% 1.1 0.2% $50,325 $0 $50,325 44.0 #4 1100.01 6.1 0.7 58.7% 2.5% 56.2% 0.4 0.1% $40,702 $0 $40,702 18.7 #5 Retrofit 28.01 223.7 16.1 84.5% 2.5% 82.0% 1.1 0.2% $154,290 $0 $154,290 13.9 #6 1000.01 3.9 0.3 84.6% 2.5% 82.1% 0.2 0.0% $39,292 $22,779 $62,071 7.6 #7 400.01 131.7 0.3 59.9% 2.5% 57.4% 0.2 0.0% $85,770 $0 $85,770 4.4 #8 Retrofit 26.01 32 2.4 69.8% 2.5% 67.3% 0.0 0.0% $51,956 $0 $51,956 0.0 #9 800.01 1.1 0.1 49.0% 2.5% 46.5% 0.0 0.0% $35,015 $0 $35,015 1.6 #10 900.01 0.7 0.0 28.7% 2.5% 26.2% 0.0 0.0% $34,168 $0 $34,168 0.7 #11 11.4% $1,596,027 $74,259 $1,670,286 1. Stand Alone BMP Removal Efficiency is equal to the Direct Watershed TSS Load Received/TSS Load Trapped. 2. Stand Alone Street Sweeping Removal is the percent removal achieved by using a Mechanical SS, with No Parking Controls 3. Net BMP Removal Efficiency After Street Sweeping is equal to the Stand Alone BMP Efficiency minus the Stand Alone SS Efficiency MSA Alternatives - #11):