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I <br />m:. <br />k- <br />Hardcover Status of Weed Control Fabrics May 22, 1991 <br />Page 3 of 5 <br />7. Until a very recent directive by the Council# the water <br />surface area of swimming pools had been considered non— <br />hardcover for calculation purposes# on the basis that rain­ <br />fall on the pool water surface was held in place rather than <br />running off. The Council rationale for calling the water <br />surface "hardcover" is that rainfall hitting the water <br />surface is not absorbed into the ground. <br />8. Other items not listed above have been considered <br />hardcover when they consist of a surface that does not allow <br />direct absorption of rainfall into the ground. <br />Landscape Beds on Residential Properties - <br />Installation of decorative landscape beds on residential <br />properties may serve a number of purposes: <br />1. As an alternative to grass lawn where grass won't <br />thrivOf i.e. shady sides of buildings# and drip lines below <br />eaves• <br />2. As an aesthetic amenity# oiten to highlight trees or <br />shrubs and minimize maintance around same. <br />3. On terraced slopes which are hard to mow. <br />4. As garden pathways or walkways. <br />By design# landscape beds with rocks or wood chips are not <br />easy to mow# and therefore the need for other forms of weed <br />control is prevalent. Weed control typically includes: <br />a. Use of non-porous polyethylene sheeting# providing a <br />physical barrier to weed grovrth as well as limiting do%mward <br />flow of moisture# and possibly limiting sunlight. <br />b. Permeable geotextiles# fabrics which allow air and <br />water flow but provide a fairly effective weed barrier. <br />c. Removal of weeds by hand. <br />d. Usa of various chemicals which either kill weeds or <br />sterilize t’ oil. <br />Staff has r earched the various types of chemicals for <br />weed control. Ho>.^ror, especially on lakeshore properties# it is <br />assumed that improper use or excessive use of such chemicals <br />increases the potential that they will be carried with runoff <br />into the lake. <br />K''