Laserfiche WebLink
Memo to Ken Landau -2- 4 June 1985 <br /> 5 . The proposed cover species Bromus Mollis ( soft chess) , is an <br /> annual grass , not a perennial , making it undesirable as a <br /> final cover species. More information on Bromus Mollis such <br /> as rooting depth, density of cover, drought resistance, and <br /> recovery after disruption should be supplied. <br /> 6. The soil permeability data submitted is not adequate. The <br /> specific test method used ( fixed ring, triaxial , falling <br /> head, static head) , test procedures ( saturation times , <br /> pressures , length of run , etc ) , gradation analyses and <br /> optimum density vs . water content for all samples, and the <br /> actual test data and calculations must be supplied. <br /> The permeability values that were supplied in the submitted <br /> plan should be verified and further tests run on the <br /> actual material to be used for cover. After reviewing the <br /> gradation analyses and the bore logs supplied, it would <br /> appear that the results of permeability tests run on <br /> remolded samples from the borings would not support the <br /> statement that "at least 80 percent of the cemented silty <br /> sand and sandy silt materials below the five foot level and <br /> the shallower soils have permeabilities less than 1 x 106 <br /> centimeters per second" . <br /> 7 . The bore logs , referenced in the submitted plan , from the <br /> December 1984 drilling should be supplied. <br /> GARsjec <br />