01-22-2019 Planning Commission Packet

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I'3) 0.45 gpd/ft2 Absorption area Soil Loading Rate, which gives a mound ratio of 2.7 (minimum) (this must match the soil boring log) desired mound ratio 2.7 24) 20 percent site slope (0-20% range) 20 (% downslope site slope, if different than upslope) 25) 18 inches, or 1.5 ft. to Redox or other limiting condition (need at least 12"to be a Type I) Treatment zone contains 0 inches of 0%soil credit, and 0 inches of 50%soil credit. Giving a: 26) 18 inch, or 1.5 ft. Sand Lift Mound CRITICAL FOR FUTURE CERTIFICATIONS!!! 27) 27.0 ft.Total ABSORPTION width (with sand beyond rockbed as follows:) 28) 0.0 ft. upslope and sideslope 17.0 ft. Downslope Individual slope ratios give BERM widths (topsoil beyond rockbed) of: 29) 4:1 upslope ratio 8 ft. upslope berm 30) 3:1 sideslope 17 ft. sideslope berms 31) 3:1 downslope 41 ft. downslope berm 32) Overall Dimensions: 10.0 ft. wide by 62.5 ft. long Rock bed 59 ft. wide by 97 ft. long Mound footprint 4" inspection pipe 18" cover on top ,<Upslope berm 8 Downslope berm 41 } 12" cover on sides (6"loamy cap&6"topsoil) [7:51 Clean sand lift _ 1.5 Depth to Limiting Limiting Condition . Absorption Width 27.0 ~—_ Note: For 0 to 1%slopes, Absorption Width is measured from the Bedequally in both directions. For slopes >1%, Absorption Width is measured downhill from the upslope edge of the Bed 33) Rock Bed: 10.0 ft. by 62.5 ft. by 6 inches under pipe, plus 20%gives 21 yds or*1.4= 29 ton 34) Mound Sand: (note: volume is based on 3:1/4:1 slope from top of rockbed, Exchange sand for loamy cap if desired) 22.3 up + 253.5 downslope + 22.5 ends+ 57.9 under rock= 427 yd3 or*1.4= 598 ton plus 20% 35) Loamy Cap: 55 ft. by 93 ft. 6"deep, plus 20%gives 114 yds or*1.4= 160 ton 36) Topsoil: 59 ft. by 97 ft. 6"deep, plus 20%gives 127 yd''or*1.4= 178 ton I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and laws. Rusty Olson"s Soil& Pert 810 6/16/2018 Designer Signature Company License# Date