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• <br /> Thomas E. Wohlleber <br /> January 31, 1994 <br /> Page 3 <br /> The following table has been developed for comparison of areal requirements and estimated costs <br /> of the two types of systems at three design flow rates. Rates utilized are code flow(15,000 gpd), <br /> flow similar to that allowed for West Middleton Elementary School (5,500 gpd) assuming variance <br /> approval, and flow estimated for installation of ultra low-flow water fixtures (3000 gpd) which also <br /> assumes variance approval. <br /> System Alternatives Comparison <br /> Required Area <br /> System Type (acres) Cost <br /> Code Flow (15,000 gpd) <br /> Shallow Conventional 6 $280,000 <br /> Mound 2 $300,000 <br /> Variance Flow (5,500 gpd) <br /> Shallow Conventional 2 $121,000 <br /> Mound 1 $111,000 <br /> Variance Flow (3,000 gpd) <br /> Shallow Conventional 1-1/4 $80,000 <br /> Mound 1/2 $60,000 <br /> Note: Costs include contingencies (10%) and engineering (20%). <br /> Systems are designed at 150% to allow for resting of 1/3 of the infiltration area on an <br /> annual basis. <br /> Acreage for Shallow Conventional alternatives includes replacement area. <br /> We hope this report meets your needs. If you have any questions or need further clarification of <br /> any portion of the report, please give us a call at (608)249-0471 <br /> Sincerely <br /> Owen re-. : Associates, Inc. <br /> /� ' <br /> Robert ►•F. Whitmyer, CPSS, CSTM <br /> Soil Scientist <br /> c.)2_ <br /> Richard A. Apfel, C` <br /> p , CST <br /> Project Manager <br /> RVWV/RAA:gch <br /> hwykfrep.doc <br /> 18-0132.00 <br />