t ' Preferred Parking Lot Scenario <br />a (with permeable pavement) <br />Rainwater is stored temporarily and percolates <br />' t through gravel into the earth. <br />J , Chemicals and contaminants percolate through <br />y gravel into the earth, being filtered and broken down <br />k ' I by microorganisms. <br />~ • • ,tt~~~ J/ i <br />~~f arcs 70.E <br />. Minimal runoff travels into the swale. <br />The swale is not overfilled, supports healthy plant life, <br />and promotes percolation of water into the earth. <br />a , A Undesirable Parking Lot Scenario <br />s ; (with mud and/or impervious pavement) <br />+ r Rainwater travels directly to the Swale, causing ero- <br />S ' 4 Sion and overfilling the swale. <br />Chemicals, contaminants, and silt/mud flow directly <br />into the swale. <br />The swale is overfilled - silt, mud, and contaminants <br />accumulate and are not able to percolate into the <br />• f., earth. <br />Illustration 03: Gravel parking diagram. <br />McCamant & Durrett Architects Page 3 5/6/13 <br />1329 <br />Illustration 02: Parking area in Nevada City, CA. <br />