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Home My WebLink Aboutseptic info � ♦w .. August 30, 1991 Tim Hillman 400 Leaf Street Long Lake, MN 55356 RE: Request to re-connect to the existing drainfield Dear Mr. Hillman: Earlier this spring some surface discharge was noted below the tanks and it was discovered that the tile exiting the second tank ended after approximately 5 feet, outletting to a bed of driveway rock just west of the existing driveway. The City requested at this time to cap off the two existing tanks of approximately 750 gallons each such that the tanks could be used as a holding tank. The original drainfield was disconnected at some point in the past, probably due to the fact that it was not functioning properly. No permit was issued for any work done to the septic system so neither the problem nor the attempted solution is known. The existing system in its current state functions as a holding tank and does not conform to State or City codes. The existing , drainfield may or may not have the ability to treat all the household waste, however, it may work adequately until a decision regarding the Stubbs Bay Sewer Project is made. Also, the financial hardship of having a septic tank pumped every two weeks will be reduced as the drainfield should treat part of the household waste if not the entire load. The requirements for the reattachment of the drainfield will be as follows: 1. A repair permit will be required and a City licensed contractor will reattach the existing drainfield and replace any other components of the septic system deemed necessary at the time repairs are made. � , .. Tim Hillman August 30, 1991 Page 2 2. Drainage which currently runs toward the culvert at the north end of the property must be diverted away f rom the distribution box and existing drainfield lines. Grading must be approved before project can be finaled. 3. If the drainfield area when in use shows any evidence of failure or high liquid levels in the trenches, additional septic tank pumpings will be required. If there are any questions, please contact me at the City offices. Sincerely, ��_ Ste e Weckman Septic System Inspector SW/lsv . . B-� �Vastcwater, which enterti the soil in tt sewa��e treatmen[ system, becomes food and water for the biolo;�ical community. Domestic What /s w�lstewater is 99.9�/o wtiter and only 0.1% pollutants that need to be (/1/aSteWater? removed. Wastewater trecitment is difficult because it is necessary ro maintairl a very high removal efficiency while dealing with lar�e volumes of water. The U.1% in wastewater that must be removed or modified consists mostly of organic material, bacteria and nutrients. The organic rn�iterial, which is sometimes called the "biochemical oxygen demand" (BOD), comes from a variety of sources in a domestic wastewater system. Food preparation, dish washing and clothes washin��, and wastes from the relatively inefficient hunrin digestive system all disch.trge into the doi»estic sewabe system. Figure B-4 shows the concentration of BOD, suspended solids, and other materials in raw sewa��e and in septic tank eftluent. BOD and suspended solids are r»easures of the percent.iy�e of or;_;anic �n.iterilll tOUf1CI lIl W�istewater. P,ithoy�ens are microorganisms th�tt cause disease and are usually present in domestic sewa��e. Fecal coliforins are indicators of the pl�esence of pathobei�s. Fi��ure B-4 shows that in 100 ml (about 1/2 cup) of septic tank ef�fluent, the►•e ai'e between 1000 and 1 million fecal colifoiz»s. "I'here are about the stui�e nun�ber ot�viruses in this quantity of efflui;nt. Figure B-4: Treatment Efficiencies of Soils One foot Three feet Raw Septic tank below trench below trench Parameter waste effiuent bottom bottom BODS(mg/I) 270-400 140-175 0 0 TSS (mg/I) 300-400 �5-65 0 0 Fecal coliform 1 miliion to 1 thousand to 0-100 0 (MPN/100 ml) 100 million 1 million Viruses (Unknown) 100 thousand to 0-1000 0 (PFU/ml) 10 million Nitrogen Total (mg/I) 100-150 50-60 --- --- NH4 (mg/I) 60-120 30-60 'B-60 B NO3 (mg/I) less than 1 less than 1 B-40 B-40 Total phosphorus (mg/I) 10-40 10-30 B-10 B-1 'B = background Figurc B-� On the North Shore o f Lake Minnetonka ON-SITE SEWAGE TREATMENT INSPECTION REPORT � POST OFFICE BOX 66 1335 S. Brown Rd. � � � � Crystal Bay, MN 55323 473-7357 OWNER � �"��' ADDRESS �"`��`�T'" -�T PERMIT NO.'S. I�� DATES � CONTRACTORS ��IA°Y 1''oS� City Ordinance No.210 requires that each on-site sewage treatment system in Orono be inspected on a regular basis.The onsite sewage treatment system at the above address has been inspected and appears to fall into the category checked below. (This is �an existing system ❑ new construction) � � Meets or exceeds current City standards in all respects relating to design,construction,and location.Appears to be operating properly, � 2 Does not meet alt current City standerds for new construction (1978 Code) but in most respects appears to be designed, located, and constructed generally in accordance with previous codes.System appears to be functioning properly;no major upgrading of the system is required at this time. � 3 Dces not meet current City standards in many respects relating to design,construction,or location.Appears to be operating adequately at this time,but has a relatively high potential for future problems. No major upgradi�g of system is required at this time. � 4 System may or may not meet current City standards for design,construction ot location,but is failing to property treat and dispose of the current input,and is endangering a water supply,or is a source of pollution to surface or groundwaters,or is creating a safety hazard,or is otherwise ereating a public nuisance.Please contact the City Inspector to discuss system repair/ replacement procedures. If drainfield replacement is necessary,soil testing will usually be required,and a design and site plan must be submitted for review.Your contractor must obtain a permit before work is started. SYSTEM CONDITION (m Checked items may require your action) Tank'nspection indicates: � Inspection pipe is located directly over tank baffle.(Does not �Pumpout not needed at this time, give accurate measurement of solids accumulation.) If tanks Solids accumulatio� in tanks indicates they should be pump- have not been pumped out within the last three years,they ed out thia year to help prevent future problems. should be pumped out now. ❑ Solids accumulation in tanks is at a critical level. Tanks Drain ield inspection indicetes: should be pumped out as soon as possible, � �Drainfield is dry,no surfacing evident. ❑ System is discharging to surface. Tanks must be pumped '0 Some evidence of surfacing,not critical yet. within 48 hours to elimi�ate surface discharge, ❑ �reinfield ia saturated and visibly discharging untreated ❑ Inspection risen missing—tanks could not be inspected, effluent to the surface. This condition may require replace- Inspection risen (4"dia.pipe)must be installed in each tank ment or additions to drainfield. Contact the City Inspector at next pumpout. If tanks have not been pumped out within immediately.Repairs must be completed within 90 days. the laat three years,they should be pumped out now. ❑ Drainfield extent and condition unknown. SITE CHARACTERISTICS: . Limiting Site Factors Potential for System Failure Site Capabilities for ❑ Slope (depends on soil types,water Future Expansion ❑ Soil table,and system condition) O Adequate ❑ High water table �Low �Fair ❑ Lot size Medium ❑ Poor ❑ Lake,wetland,or stream ❑ High ❑ Inadequate ❑ Drainage ❑System is causing visible surface discharge. COMMENTS: ✓ Q� B �✓ 1 /Y/7.� � ol e � � ��-�� Date of Inspection eptic System Inspector Note: In the event that this inspection report is used to satisfy the requirements for a mortgage or other transfer of property,be advised that this report does not guarantee or certify that an existing system will continue to function properly,but is merely an opinion of the adequacy of the system under current conditions based on the available information. This report must be kept on the premises with system location and pumping records. WHITE COPY/Inspector's File GOLD COPY/Homeowner