Laserfiche WebLink
<br />TIle preliminary design layout as shown on Drawing 1, considers <br />these factors. The map was determined from aerial photos and USGS Quad <br />Sheets, and all set backs, property lines, street widths have not been verified <br />in this design layout. Further, depths of the collection system are held at a <br />minimum to offset the possible rock outcrops that may exist in the area. Costs <br />reflect the shallow depths, rock layers, and possible use of polyvinyl chloride, <br />or Affi Truss collection pipe. Service lines are included in this estimate from <br />the collection line to the property line of the residence. The residence will <br />be responsible from the property line to his home connection. <br /> <br />Design Criteria Collection System <br /> <br />Sewage Treatment <br /> <br />Sewage treatment for small communities is usually accomplished by <br />use of waste stabilization ponds (lagoons) or small aerated activated sludge <br />plants. Either can meet the standards if well designed and operated <br />correctly. A small aerated activated plant by state regulations must be <br />followed by a retention pond. <br /> <br />The availability of low cost land adjacent to the town makes the lagoon <br />treatment a first choice for treatment of the wastes. Discharge from the lagoon <br />is to Raton Creek, as shown. <br /> <br />Aerated Pond <br /> <br />COnstruction of an aerated stabilization pond will be required. The <br />flow or design criteria are: <br /> <br /> Initial Future <br />Flow (gpd) 30,000 47,900 <br />BODS 30 mg/l 20 mg/l <br />SS 30 mg/l 20 mg/l <br />Fecal coliform 200 orgs/IOO m/l <br />Residual cl. less than 0.5 mg/l <br />pH 6.0 - 9.0 <br /> <br />- 8 - <br />