Public Health STARK COUNTY HEALTH DEPARTMENT

Transcription

1 Public Health Prevent. Promote. Protect. Dear Applicant: STARK COUNTY HEALTH DEPARTMENT 4424 US Hwy 34, Kewanee, IL This is your private sewage packet. Enclosed within this packet is important information regarding specifications and policies for your new private sewage disposal system or repair of an existing system. Please read it carefully, fill out the enclosed application blank, sign it, and send it in with the appropriate permit fee, or deliver it to the address closest to you no later than 15 days prior to excavation. Within 15 days of receipt of your application, the Stark County Health Department will review it to determine whether your proposal meets the requirements of the Ordinance. You will receive a copy of your permit application with approval, disapproval, and any pertinent comments on the reverse side of the application. You must be in possession of your approved permit application before you begin any construction. A permit fee of one hundred dollars ($100.00) will be charged for new and repaired private sewage systems and one hundred dollars ($ ) for water well systems. Your system must be con-structed by a State licensed and County registered private sewage installer, or you may do the work yourself provided the system serves your own single family residence. The Stark County Health Department must be notified for a final inspection of sewage construction before back filling. Please provide 48 hour notice. Instructions for Applying for a Permit A. Property Description: Please provide an accurate property location/description. (This shall include - Street or address, Subdivision and lot number, or full legal description and Parcel number.) This information must be listed on or attached to your application. Full legal description and parcel number may be obtained from the Stark County Assessor's office, your tax bill or building permit. B. Plot Plan: Please draw up a sketch of the property with the location of your proposed, individual sewage disposal system. This must be drawn on the application form. If more space is needed, submit sketch on a 8% x 11 sheet of paper attached to the application. 1) Scale - The plan should be drawn to a scale of one inch equal to forty feet (1 " = 40') or an appropriate scale. 2) Boundary Lines - The plan should include all boundary lines, if possible. When the total lot is too large to show in the plan, at least the part of that lot to be used by the building, well, and sewage system must be shown. 3) Well - All wells, including closed looped wells, whether located on the property or not, within 200 feet of the drainfield and 75 feet of the septic tank, must be on the plot plan. Indicate all pressurized water lines.

2 4) Closed Looped Wells - Within 200 feet, must be shown on the plot plan 5) Building - The house or other building which the sewage system will serve must be shown on the plot plan. 6) Roads and Driveways - All roads, driveways, and parking areas in the vicinity of the sewage system must be shown on the plot plan. 7) Surface Water - All lakes, streams, major drainage ditches in the vicinity of the sewage system must be shown on the plot plan. 8) Sewage System - The sewer line, septic tank, and drainfield must be shown, in scale, on the plot plan. 9) Landscave - Trees, large obstructions (rocks, ravines, etc.), hills, steep inclines as well as level ground, must be shown on the plot plan. 10) Percolation, test holes, and soil borings - Indicate on the plot plan the approximate location of these test holes. MINIMUM VOLUMES FOR SEPTIC TANKS SERVING RESIDENTIAL UNITS Number of Bedrooms 2 or less Minimum Liquid Capacity of Tank Gallons Minimum Liquid Capacity of Tank Gallons When Garbage is Used

3 Instructions for Conducting; Percolation Tests Percolation tests shall not be made in frozen ground or ground that has been filled in the preceding 12 months. Percolation tests shall be performed in accordance with the following procedures: Number and Location of Percolation Tests Select an area where the seepage field will be located. When digging the holes, avoid animal burrows, large root channels, etc. At least 3 separate percolation tests shall be performed at the site of each proposed disposal area. The percolation test holes shall be at least 50 feet apart. At least one hole shall be located at the lowest elevation of the proposed absorption field area. The 2 holes with the highest results shall be used to determine percolation rate. Depth of Percolation Test Hole Dig or bore the holes with horizontal dimensions approximately 4 to 6 inches in diameter to the depth of the proposed seepage field or seepage bed. Preparation of Test Hole Carehlly pick the bottom and sides of the hole with a knife blade or sharp pointed instrument to remove smeared or smoothed soil and to provide a natural soil interface into which water may percolate. Remove all loose material fiom the hole. Add 2 inches of coarse gravel to protect the bottom fiom scouring and sediment. A removable hardware cloth screen to line the lower part of the hole also helps prevent sloughing of the hole sides during testing. Saturation and swelling; of soil: It is important to distinguish between saturation and swelling. Saturation means that the void spaces between soil particles are full of water. This can be accomplished in a very short period of time. Swelling is caused by the intrusion of water into the individual soil particle. This is a slow process, especially in a clay type soil, and is the reason for requiring a prolonged soaking period. On the day prior to conducting the percolation test, carehlly fill the hole with water and keep it full for at least 4 hours. The percolation test shall be conducted on the day following this presoaking at least 18 hours after presoaking is completed but prior to 30 hours after presoaking is completed. Cover the hole during this hour waiting period. In sandy soils with greater than 70% sand and less than 15% clay (sand and loamy sand), after the 4 hour presoak, a percolation test may be attempted without the 18 hour waiting period. If the percolation test results are greater than 45 minutes for a 6 inch drop in water, the test must be repeated after the 18 hour waiting period. If the percolation test results are 45 minutes or less, the percolation rate shall be used to size the system.

4 Allow the water level to drop to a point 6 inches above the gravel. If the water does not fall from 12 inches to 6 inches in 6 hours, the percolation test is terminated and an alternate system is required. Measure the last 6 inch drop in water level at thirty minute intervals until all the water has seeped away. Warning. Under no conditions shall measurements be taken from water filled to the top of the hole or on water 12 inches deep in the hole. Such results are completely invalid and will not be accepted. Results from the last 6 inches of drop in water are the only results that will be accepted. Recording of Results Record results of all tests as the total minutes required for the last 6 inches of seepage. If the last 6 inches of water has not seeped away at the end of 6 hours, the soil must be considered unsuitable for seepage field disposal and the appropriate statement marked on the results form. If there is more than a 30 minute difference between the highest 2 percolation tests, use the larger result or perform additional percolation tests. Calculating the Percolation Rate Add the total minutes required for the last 6 inches of water to fall from the 2 holes with the highest result and divide by 2. If the average is less than 60 minutes, use the percolation rate of 60 minutes. If the average is greater than 60 minutes, refer to Section 905.Appendix A, Illustration H of the Part. Locate in the first column (Time (minutes) required for the last 6 inches of water to fall) where the highest 2 hole average fits and use the next highest result as the percolation rate for sizing and design. An example of this procedure is as follows: If 3 percolation tests are conducted with results of 120 minutes, 140 minutes, and 155 minutes, the highest 2 hole average would be ( )/2 or minutes. Looking at Section 905.Appendix A, Illustration H of the Part, the next highest result would be 150 minutes. The 150 minute rate would be used to size and design the subsurface seepage system. Distribution of Results The results of the percolation tests shall be given to the homeowner and shall be retained by the contractor for at least 5 years. The percolation test data report shall be returned to the appropriate regional office or local authority.

5 The Stark County Health Department determines drainfield size by percolation test and soil type and classification date. When the soil, as shown by these test holes and percolation tests, is proven to be satisfactory, the application is completed and returned, and the permit fees are received, a permit is issued. The permit is valid for six (6) months. The permit is not transferable. SUBSURFACE SEEPAGE SYSTEM SIZE DETERMINATION Time (minutes) required for last 6 inches of water to fall FOR RESIDENTIAL USE Required Absorption Area (ft2/bedroom) FOR INSTITUTIONAL OR COMMERCIAL USE Allowable application rate (GPD/ft2) NOTE: 1. If there is more than a 30 minute difference between percolation tests, use the larger results, or perform another percolation test. 2. Absorption area is figured as trench bottom area in absorption trenches; effective sidewall area in seepage pits; and bottom area in seepage beds. 3. Seepage beds require1 % times the seepage fields absorption area specified. 4. Over 360 is unsuitable for subsurface seepage systems. 5. Under 1 8 is unsuitable for subsurface seepage systems.

6 LEVEL SAMPLE PLOT PLAN

7 RECOMMENDED DO'S AND DON'TS Acquire application for permit from Stark County Health Department. Do select an adequately sized, watertight septic tank with proper baffles and access. Don't use septic tank additives; they may harm your system by clogging the soil treatment unit. Don't use a garbage disposal with a septic tank unless you plan to follow a rigid maintenance schedule. Don't go down into a septic tank. Don't run footing drainwater in the sewage treatment system. Don't run water softener backwash water into the septic tank. Don't bypass the septic tank with washwater; run all sewage into the septic tank. Investigate the site and soils carefully; select the proper location for the soil treatment unit. Keep the sewage treatment system shallow, both the septic tank and the soil treatment unit. Use clean rock %" to 4" in diameter; don't use crushed limestone. Use 6" - 8" of rock below the distribution pipe. Carehlly prepare the soil surface, especially clay soils. Use a backhoe bucket that has side teeth to leave the trench sidewalls rough. Don't excavate with a front end loader or bulldozer blade. Don't use distribution boxes on sloping ground. Provide 6' solid piping out of all distribution boxes. Don't install a holding tank for a new home. Don't install your system and forget it. Maintain your sewage treatment system regularly, even when it is working properly; it will be a lifetime installation. Have a contract to service your sewage treatment system.

8 SEPTIC TANK AND SUBSURFACE SEEPAGE FIELD perf orated pipe Distribution lines shall be level. SFCTION VrrW PLW VIEW tank or distribution box (when used) shall be cast iron, solid schedule 40 PVC, or equivalent... Y ~Nevssaper, Strov, ecc. 7 2 " Gravel '. L" Discr%bucion Line ; The bedding material shall be washed gravel or washed stone with particle size ranging from 3/4 inch minimum to four inches maximum. 1 The bedding materials shall covered by straw, newspaper untreated building paper. END VTM

9 SEPTIC TANK SEWAGE DISPOSAL SYSTEMS FOR HOMES I. GENERAL REQUIREMENTS Septic tank and disposal field systems are recognized as the most feasible means for private, individual sewage disposal; provided, however, that septic tank and drainfield sewage disposal svstems shall be installed only where suitable soil. drainage conditions and land area will permit the use of such systems with assurance that sewage effluent will be absorbed into the soil and not contaminate the surface of the ground or any ground water supply. pollute surface waters. and where inevitable re~airs and relocations of such systems can be made without creatin~ a community health problem, MINIMUM DISTANCE ALLOWABLE FROM Artificial COMPONENT Cistern Lake, Drain PART Well, Stream OF or In ground SYSTEM Suction Water Swimming Line from Supply Pool or Pump To Line ' Other Body Property Property Well Pressure of Water Dwelling Line FEET FEET FEET FEET FEET FEET Building Sewer2 Septic Tank or Aerobic Treatment Plant Distribution Box Subsurface Seepage System Sand Filter Privy Waste Stabilization Pond Surface Discharge Effluent Line2 Effluent Receiving Trench ' These distances have hem determined for use in clay. silt and loam soils only. The minimum distances required for use in sand or other types of soil shall he determined for the proposed private sewage disposal system and approved by this Department. Such approval will he given where the Department determines that the soil wiu provide treatment of the sewage. ' The building sewer or surface discharge effluent line may be located to within 10 feet of a well or suction line from the pump to the weu when cast iron pipe with mechanical joints or Schedule 40 PVC pipe with watertight joints is used for the building seww or surface discharge effluent line. ' See Section (d) for additional details on water line and sewer separation. This includes lawn irrigation piping.