Agenda - 06-06-1988 - Laserfiche WebLink

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' 1 • - -- - - ' - . , , • - . . - .. _.:• ei':. 147 , Ms. Emily Crudup May 2, 1988 Page :2 :- The total road length is approximately 1.5 miles and this project will result in an increase in nonpoint pollution from additional automobile traffic. Some steeply sloped areas (15% or so) would have to be cut or filled for road construction and it appears that there would be several extended ditches along the roads. The proposed roadway drainage system will be a long-term erosion problem and become a major pathway for sediment and . pollutant transport. Runoff from the proposed roadways must be carefully, controlled to minimize discharge into surface waters. Proposed roadways Should be relocated and reduced in length to minimize the required cut and fill, and potential for pollutant runoff to directly enter surface waters. The use of grassed swales along proposed roadways must be carefully evaluated to assure that swales can be established and permanently maintained on the steeper sloped areas. • Sedimentation and Erosion Control C1SIASA has previously expressed concerns relative to the need for effective sedimentation and erosion control measures during and after project 1 construction. These issues have been generally discussed with Mr. Warren Faircioth, Orange County's Erosion Control officer. , . A number of the proposed lots and some of the proposed roads will be located on steeply sloped areas of the site. Lot 4, and Lots 21 through 30 are located on slopes that exceed 20%. Some road sections would be located on slopes of 15% or more. Roads should not be sited perpendicular to the contour on steep slopes. Significant sedimentation and erosion can occur if effective sedimentation and erosion control measures are not implemented in a timely manner and permanently maintained. Assurance must be provided that the sedimentation and erosion control measures will adequately control 1 • erosion at the site. 1 , proposed Use of Septic Tank Systems 'Individual septic tanks and soil absorption fields are proposed to be used within this project. Because of the nature of their design, septic tanks and subsurface absorption systems should not be expected to give trouble-free service over the life of a house. It has been reported that they have an average effective life of 10 to 15 years, assuming no misuse, before rehabilitation, modifications or replacement is necessary. Based on a review of the Soil Survey for Orange County, soils appear to be moderately and-severely-limited-for-use-as_septic tank absorption fields. For these reasons, consideration should be given to the alternative septic tank-system design and maintenance concepts previously recommended by °ASA for other similar projects (dual-drainfields, identification of primary and reserve . drainfield areas in the field and on the plat and deed, regular inspection and maintenance program, etc.) . , - 1