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36 <br /> ALTERNATIVE 01: IMPERVIOUS SURFACE LIMITS AS RECOMMENDED BY THE JOINT WATERSHED WORK GROUP. <br /> TABLE 6.25.4 IMPERVIOUS SURFACE RATIOS FOR UNVERSITY LAKE WATERSHED <br /> THE TOTAL <br /> IMPERVIOUS <br /> WHERE THE SURFACE MAY <br /> LOT SIZE IS: NOT EXCEED: <br /> 5.0 acres or above 4.0% <br /> 2.0 to 4.9 acres 6.0% <br /> Less than 2.0 acres 12.0% <br /> An impervious surface is a surface composed of any material which impedes or prevents the natural <br /> infiltration of water, into the soil. Impervious surfaces shall include any paved or unpaved surfaces <br /> comprised of asphalt, concrete, crushed stone, compacted soil or other similar material. <br /> Impervious surfaces include, but are not limited to, streets and driveways, sidewalks, patios, garages, <br /> dwellings, and similar structures which cover the land. <br />