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Minimum Requirements for Alternative On

1. ee EEEE EEEE DISTRICT HEALTH DEPT www lmasdhd org Luce County Administrative Office 14150 Hamilton Lake Road Newberry MI 49868 906 293 5107 Fax 906 293 5453 Mackinac County 749 Hombach Street St Ignace MI 49781 906 643 1100 Fax 906 643 0239 Home Health amp Hospice 906 643 7700 Fax 906 643 771 Alger County E9526 Prospect Street Munising MI 49862 906 387 Fax 906 387 2224 Schoolcraft County 300 Walnut St Room 155 Manistique MI 49854 906 341 6951 Fax 906 341 5230 Delta County Bay Shore Home Nursing 524 Ludington St LL102 Escanaba MI 49829 906 789 1284 Fax 906 789 1445 Menominee County Bay Shore Home Nursing 1320 First Street Menominee MI 49858 906 863 1211 Fax 906 863 3352 Home Health amp Hospice Environmental Health Personal amp Family Health Community Health Services RSE Date of Draft January 8 2009 Date of Board Approval Minimum Requirements for Alternative On Site Sewage Treatment Systems reatment Systems echnical gufdance manual per Article 1 0 Section 1 5 ofjthe LMAS District Health Department Superior Enyironmental Health Code DRAFT Preface The minimum requirements set forth in this document were developed by the LMAS District Health Department Environmental Health Division The minimum requirements contained in this document have been development for district wide application of alternative methods of r
2. Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 3 of 84 DRAFT D Appendix o Determining If The Site Is Too Wet To Begin Construction Ta Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 2 of 84 DRAFT Determining If The Site Is Too Wet To Begin Construction A good test for determining if the soil is too wet to excavate is to take a small amount and try to form a ribbon of soil in your hand If the soil holds the ribbon when you open your hand it is too wet to allow construction to proceed improper Conditi Soil Teo Wet Forma ribbon when in paim of hand DLA If the soil crumbles and will not stay formed when you open your hand then it is probably safe to allow construction to proceed Proper Condition Soil Crumbles Dry enough to proceed with excavation Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 3 of 84 DRAFT We Appendix ii for Qualitative Field Test of Sand Cleanliness Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 4 of 84 DRAFT Procedure for Qualitative Field Test of Sand Cleanliness Sand fill materials for mound construction should be obtained from a supplier that has documented through sieve analysis that the required specification is met As results of sieve analyses will typically vary over time it is recommended that a qualitative field assessment of the cleanlines
3. sewage flow gpd 4 doses per day gal dose 3 Pump design total dynamic head TDH elevation head friction head loss a Elevation head drain tile it pump ft total Y f b Friction head loss Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 15 of 84 DRAFT fittings ___ elbows size X ft elbow equivalent length of straight pipe ft pipe ft pipe length size X ft friction loss 100 pipe ft friction head loss ft fittings equivalent length of straight pipe ft pipe ft Total dynamic head loss ft elevation head ft pipe ft 4 Pumping specifications a Dosing volume gal dose b Dosing time min c Pump duty point gpm at pump performance curve feet TDH attach copy of d Pump make Pump model h e Pump pump chamber mis yes ho dual altefnating pumps audio visual alarm pumps accessible explosive proof design emergency power source provided each sized for peak flow pao on box for disconnect ell ve 5 OTHER Drainfield Mound 1 Amount of Fill inches Fill Type 2 Linear feet of pipe 3 Pipe material 4 Pipe diameter in volume gal ft Note total pipe volume must equal or exceed the dose volume 5 Effective seepage area square feet 6 Pipe spacing feet on center 7 Aggregate size cubic yards Source 8 Specifications of GeoTextile fabric to be used Minimum Requirements for
4. GPD LF BK GR_s BK GR SOIL STRUCTURE DODE REQUIRED DOWNSLOPE GREENBELT SLOPE gt 2 FEET SOIL nil FINE SAND LOAMY SAND ad 10 fro FaF FEEF ih wo G so sof sol 2s os 45 2 0 2 F rae i ELL TABLE LEGEND BK BLOCKY 1 WEAK GR GRANULAR 2 MODERATE PL PLATY 3 STRONG M MASSIVE U UNSUITABLE Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 51 of 84 DRAFT Table 2 Minimum Horizontal Isolation Distances From Toe of Mound Fill To Minimum Horizontal Isolation Distance feet Private individual well 50 Surface waters 100 Basement foundation walls 50 Top of drop off 20 Property lines 10 Footing drairs installed in water table 25 without direct connection to surface water Footing drains installed in water tabl 50 with direct connection to surface water Drains designed to lower the waterAable 100 The dow foundation walls Minimum Requirements for Alternative On Site Sewage Treatment Systems lope edge of the greenbelt area may be located ithin 25 feet of the 24 Page 52 of 84 DRAFT APPENDIX B Design Example Site Criteria 1 Soil Profile A 0 8 in Dark grayish brown medium sand weak granular structure provides for a factor of safety resulting necessary to promote greater system performance and longevity Step 2 Eva
5. POEEPEPLPEDEEEPEEEEEE Es OEPEPEEEDEDEEEDEDEPEDEDEEEEED ETE A Prepared Natural Ground Surface slope 34 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 62 of 84 DRAFT Mound Component Dimensions A Distribution cell width B Distribution cell length C Up slope fill depth under distribution cell D Downslope fill depth under distribution cell 35 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 1 of 84 DRAFT Ke Submittal Checklist for Alternative Treatment Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 2 of 84 DRAFT It is important to develop overall plans that will clearly communicate how to install the system correctly The following checklist may be used when preparing plans for review The checklist is Not all needed information may be included in this list Additional information may be needed or requested to address unusual or unique characteristics of a particular suggested as a general guide project Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No N A No N A No N A No N A No N A No N A No N A No N A No N A No N A area No N A No N A No N A No N A No N A No N A No N A Submittal Checklist For Alternative Treatment Forms and Fees Application form for submittal provided by
6. mottled soil Mottled soil A soil that is marked with spots or blotches of contrasting color is usually caused by saturation for some period during a normal year unless it is artificially drained Pressure Distribution II Site Criteria treatment If additional site work borings are unagceptable B Parcel Size 1 The parcel size shall be a minimum of one 1 acre in size Consideration will be given to lots that are less than one acre in size under the following conditions a Lot was split prior to July 28 1997 b All isolation distances and setback requirements can be met c Replacement area is available C Isolation Distances 1 Standard minimum isolation distance requirements set forth in the LMAS District Health Department Superior Environmental Health Code shall be observed 2 Reductions to these isolation distances may be allowed under a variance for existing homes where a change in use that will result in an increase of water use is not proposed a Variances will be reviewed under Article 8 of the LMAS District Health Department Superior Environmental Health Code 3 The alternative system shall be constructed such that the bottom of the absorption system and or tank seams are at least one foot above the 100 year floodplain elevation Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 6 of 84 DRAFT 4 Construction shall no be allowed within 10 feet of easements and right
7. provided The location of the reserve area also needs to be clearly defined and its importance communicated to the owner 2 Specifications for all electrical and mechanical components 14 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 42 of 84 DRAFT Names and phone numbers of local health authority component manufacturer or management entity to be contacted in the event of an alarm or other problems or failure Information on the periodic maintenance of the mound system including electrical mechanical components Information on what activities can or cannot occur on and around the mound reserve area and greenbelt area A standard homeowner Do s and Don ts li Information regarding suitable lands aping and vegetation for the mound and surrounding areas 15 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 43 of 84 DRAFT APPENDIX A Figure 1 Mound System Components Figure 2 Typical Site Plan Figure 3 Mound Plan View and Cross Section Figure 4 MDOT 2NS Sand Fill Gradation Procedure for Qualitative Field Test of Sand Cleanliness Figure 5 Observation Port Example Details Table 1 Allowable Soil Loading Rat Table 2 Minimum Horizontal Isolation Distances BE 16 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 44 of 84 DRAFT Figure 1 Typical Mound System Components Distribution Ce
8. 0 1 0 01 GRAIN SIZE mm 20 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 48 of 84 DRAFT Procedure for Qualitative Field Test of Sand Cleanliness Sand fill materials for mound construction should be obtained from a supplier that has documented through sieve analysis that the 2NS specification is met As results of sieve analyses will typically vary over time it is recommended that a qualitative field assessment of the cleanliness of the sand delivered to the construction site also be conducted The following procedure is suggested 1 Fill a quart jar one_half full of the sand fill material to be tested 2 Add water to fill the jar considered clean enough and an alternate source should be explored E Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 49 of 84 DRAFT Figure 5 Observation Port Example Details ee 24 Screw Type Cap Es Jor Slip Ca rew ppe 4 PVC Pipe Length Varie 1 4 x 4 Slots 4 A i Screw Type Cap or Slip Cap N 5 3 8 1 4 Rebars 4 PVC Pipe e Length Varies D Leng S474 Slots ee Holes 4 for END VIEW BOTTOM Rebars aie 1 4 Slot 22 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 50 of 84 DRAFT Table 1 Allowable Soil Loading Rates MAX HYDRAULIC MAXIMUM SOIL LOADING RATE LINEAR LOADING RATE GPD FT
9. Alternative On Site Sewage Treatment Systems Page 16 of 84 DRAFT 9 Depth of earth cover inches 10 Berm beyond the edge of stone ft 11 Side slopes from berm edge on slope width ft 12 Greenbelt Area ft from toe of slope Soil Structure 13 OTHER VI Secondary Treatment Asp Required Specifications I Design Drawing Shall be at least 8 x 11 in size and shall be legible cl at least 2 permanent copies VIII Design cfnsutant Certification Prepared by Firm Address Phone 5 Registration oS ie eS Signature Date Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 17 of 84
10. DRAFT Step 11 Determine the end slope length K Using a recommended side slope of 4 1 the calculations is as follows K 4 C D 2 E F 4 1 5 1 7 2 1 0 1 0 14 4 ft Step 12 Determine the overall width W and length L of the mound fill W Atl J TTPLEEEL PER LEE L ETI POOEPEELEEPEELEEREEEE Es go 4 slope 28 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 56 of 84 DRAFT APPENDIX C Mound Maintenance Visit Checklist General Observations _ Overgrown L OvergrownMith brush Observation Tube in Stone Bed C Observation tube is present L Depth of ponding in tube Other Observation Tubes Describe and note distance to water below soil surface Pump Chamber Appearance Note any apparent problems or concerns L Water level normal 29 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 57 of 84 DRAFT Pump operation is L Demand float controlled L Timer controlled Number of floats L Check float operation and desirable function of each first visit only If timer is present note settings On time Off time Flush Laterals L Access i provided to ends of lin ig up ends of lines recommend addition of sumps for access h of each line by opening the end of one lateral ata time Have helper turn pump on while you observe end of line Note what flushes out of each line Provide sketch t
11. Secondary Treatment Units 1 Gregg Stoll Superior Resource Solutions 1003N MckKilligan Sub Manistique MI 49854 Aerobic treatment units amp related adjunct devic ufactured by Delta Peters Safid and Gravel Inc Engadine MI 49827 906 477 9840 2 NY LMAS Registration Approved to distribute install a Multi Flo aerobic treatment units manufactured and sold by Consolidated Treatment Systems Inc 3 David Whitman Whitman Contracting L L C 7593W Whitman Rd Manistique MI 49854 906 341 6069 4 LMAS Registration Approved to distribute install a Multi Flo aerobic treatment units manufactured and sold by Consolidated Treatment Systems Inc Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 10 of 84 DRAFT z y AT Appendix Individuals Approved as Qualified Maintenance Providers Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 11 of 84 DRAFT Approved Maintenance Providers 1 Gregg Stoll Superior Resource Solutions 1003N MckKilligan Sub SES Manistique MI sosa 1 8007900 501 LMAS Registration Approved to provide maintenance to Peters Sand and Gravel Inc W14072 Linch Rd Engadine MI 49827 906 477 9840 LMAS Registration Approved to provide maintenance to b Multi Flo aerobic treatment units manufactured and sold by Consolidated Treatment Systems Inc 3 David Whitman Whitman Contracting L
12. and experience has successfully demonstrated the ability to solve or resolve problems relating to the subject matter and work B Interested individuals shall meet the definition noted above Individuals shall submit a letter of interest along with proof that they have completed training in the proper testing maintenance troubleshooting and cleaning from the unit manufacturer Continued manufacturer training shall occur at a frequency recommended by the manufacturer which certification is held D Continuing Education Requirements once approved a minimum of eight 8 manufacturer training XVIII Licensed Septic Installer Registration Process A Interested individuals shall submit a letter of interest along with proof of experience in design and installation of systems not utilizing secondary treatment Individuals shall also indicate knowledge in design of pump systems Individuals shall specify type of systems they will be able to design Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 23 of 84 DRAFT Appendix Specifications for Geo Textile Fabric Used in On Site Sewage Systems Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 24 of 84 DRAFT SPECIFICATIONS FOR GEO TEXTILE FABRIC USED IN ON SITE SEWAGE DISPOSAL SYSTEMS 1 Geo textile fabric shall meet the following specifications a Strength 25 PSI b Air permeability r500 cfrn sq ft c Water flo
13. first 2 years of operation excluding the inspection required within 30 days of start up once per year thereafter c A meeting with a new owner is recommended at the time of transfer of the property The LMAS District Health Department should be notified of this meeting and invited to participate The provider shall provide any ure purchaser of the property with a copy of this submitted to LMAS between January 1 through February 28 of each year i Within 30 days of notification LMAS shall advise each property owner with lapsed contracts to renew Owners will be given 60 days to comply ii Failure to comply with the requirements will result in enforcement action 7 Minimum contract reporting requirements a All secondary treatment systems need servicing consistent with the manufacturer s recommendations to assure long term system performance b Ata minimum the inspection report shall include i A walk over of the drainfield and noted conditions ii Reporting of conditions observed in the observation port located in the drainfield iii Condition and water level of septic tank iii Condition of the treatment unit i Unusual odor ii Appearance of scum layer Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 17 of 84 DRAFT iii Clarity iv Condition of filters if applicable iv Alarm check V Filter cleaning vi Check of all electrical and or mechanical components include pump cycle and ru
14. is unacceptable The manufacturer distributor must demonstrate that replacement parts B Once approved future training to update siting installation start up and documentation procedures is required at a frequency recommended by the manufacturer C Continuing Education Requirements once approved a minimum of eight 8 education units shall be obtained annually At least 6 of the 8 credits shall be obtained through training sessions for alternative technology conferences pertaining to sewage disposal and treatment Two 2 of the required 8 credits can come from publication subscriptions pertaining to sewage disposal and treatment 1 The provider shall submit proof of continuing education to LMAS annually between January 1 through February 28 2 If this information is not supplied to LMAS within the required timeframe the provider will be removed from the list of approved maintenance service providers In order to be placed back on the list a penalty fee along with proof of continued education units will be required If a year or more has lapsed then provider will have to return for manufacturer training XVII Becoming an Approved Maintenance Service Provider Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 22 of 84 DRAFT A Qualified maintenance provider means a person who by possession of a recognized degree or certificate of professional standing or who by extensive knowledge training
15. natural soil surface with a slope of 3 1 three horizontal to one vertical For mounds that are constructed within a maintained lawn it is highly recommended that a slope of 4 1 or 5 1 be installed Final grading of the mound area should divert surface water drainage away from the mound f Observation Ports At least one observation port to gauge ponding depth in the absorption field is necessary see Appendix G g Cover i Geo textile fabric shall be used between the top of the stone and soil cover see Appendix A ii The absorption area shall be covered with sufficient suitable soil with a permeability gt 3 0 inches hour to Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 12 of 84 DRAFT maintain vegetation growth and seeded mulched upon completion If system is constructed after September 15 a vegetative cover must be provided Cover may consist of sod mulch straw or other suitable material to prevent freezing VIII Design Parameters for Systems Utilizing Secondary Treatment A Description Manufactured and packaged mechanical treatment devices that provide additional biological treatment to sewage producing_an effluent of and shall be stamped if prepared by a Michigan Registered Sanitarian or Professional Engineer ix Signed copy of Submittal Checklist for Alternative Treatment 2 A Michigan registered sanitarian professional engineer specializing in environmental or sanitary w
16. reviewing agency along with Copy of mound design work sheet confirming basis of design an design calculations Plot Plan Dimensioned plans or plans drawn to scale scale indicated on plans with property boundaries clearly marked Slope directions and percent in initial and replacement system area Bench mark and North arrow Setbacks indicated as per the Superior Environmental Health Code Two foot contours or other appropriate contour interval within the system Location information legal description of parcel must be noted Location of any nearby existing system or well Plan View Dimensions for absorption system Location of observation pipes Overall dimensions of mound if applicable Pipe lateral layout which must include the number of laterals pipe material diameter length and number Manifold and force main locations with materials length and diameter of each if applicable Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 1 of 84 DRAFT Cross Section of System Yes No N A Includes site prep requirement absorption system details percent slope side slope and cover material Yes No N A Lateral elevation position of observation pipes dimensions of the absorption system and type of cover material and geotextile fabric Yes No N A Sand fill specifications Tank And Pump Information Yes All construction details including cross section of tanks Yes i Yes Yes Yes
17. width defines the minimum overall dimensions of the basal area and is important when evaluating the adequacy of the mound fill area and horizontal spacing when using multiple distribution cells Step 6 Determine mound fill depth C at the upslope edge of the distribution cell In this case the depth of fill C at the upslope edge of the distribution cell will be the fill required to elevate the stone three feet above high groundwater elevation which is 1 5 ft 26 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 54 of 84 DRAFT Step 7 Determine the mound fill depth D at the downslope edge of the distribution cell For a 4 slope the following can be used D C 0 04 A 1 5 0 04 5 1 7 ft Step 8 Determine mound depths E and F Step 9 Determine the downslop width I Using a regommended side_slope of 4 1 the alculations is a n Downslope cofrection factor 100 100 side slope X ground slope 100 100 4 x slope 100 100 4 x 4 1 19 Step 10 Determine the upslope width J Using a recommended side slope of 4 1 the calculations is as follows Upslope correction factor 100 100 side slope x slope 100 100 4 x slope 100 100 4 x 4 0 86 J 4 C E F x upslope correction factor 4 1 5 1 0 1 0 0 86 12 0 ft 27 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 55 of 84
18. L C 7593W Whitman Rd Manistique MI 49854 906 341 6069 LMAS Registration Approved to provide maintenance to Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 12 of 84 DRAFT b Multi Flo aerobic treatment units manufactured and sold by Consolidated Treatment Systems Inc z y AT Appendix Mound Design Worksheet Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 13 of 84 DRAFT 1 E Worksheet Gravity or Elevated 1 Lot parcel length width of acres 2 Percent slope of steepest grades on property 3 Is any cutting of filling of land anticipated yes_ nO 4 Type of fill material to be used Fill depth feet Fill area width feet length ft 5 Mound side slope ratio vertical dimension horizontal 6 Minimum isolation distance provided to well s ft surface waters ft lot lines __ ft 7 Proposed date of installation 8 Site Preparation Requirements Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 14 of 84 DRAFT Design Data 1 Volume of flow gallons day 2 Basis for flow determination no Septic Tank 1 flank 1 gal Material Manufacturer 2 Tank 2 gal Material Manufacturer 3 Tank seam will be placed inches above seasonal water table 4 Effluent filter yes no 5 Riser yes no Dosing 1 Chamber size gal Material Manufacturer 2 Dose volume
19. Type Ila and community water supplies ten feet 10 from property lines five feet 5 from foundation walls five feet 5 from building footing drains storm drains and or other subsoil drains ten feet 10 from water lines ten feet 10 from steep embankments or drop offs and seventy five feet 75 from lakes streams or other surface water impoundments C The absorption system shall be located a minimum of fifty feet 50 from residential wells seventy five feet 75 from Type IIb non community and Type III water supplies two hundred feet 200 from Type Ila and community water supplies ten feet 10 from property lines ten feet 10 feet from foundation walls twenty five feet 25 from building footing drains storm drains and or other subsoil drains ten feet 10 from water lines twenty feet 20 from steep embankments or drop offs and seventy five feet 75 from lakes streams or other surface water impoundments Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 27 of 84 DRAFT ressure Mound Systems Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 28 of 84 DRAFT Pressure Mound Systems Technical Guidance for Site Suitability Design Construction and Operation and Maintenance Pump Chamber DED Michigan Department of Environmental Quality Water Division Land Division and Local Health Department Support P
20. Yes Yes Yes Yes No N A Maintenance contract signed by both an approved maintenance provider and homeowner Deed Restriction Yes No N A Notarized by a notary public Yes No N A Reviewed amp Signed by LMAS staff and notarized by a notary public Yes No N A Filed at County Clerks office Yes No N A Proof of Filing Variances Yes No N A Variance request form along with applicable fee Variance request must be submitted and reviewed to EH Director prior to issuance of any permits I affirm that all the required information noted in this checklist has been submitted along with the application and appropriate fee s 1 Prepared by 2 Firm 3 Address 4 Phone 5 Registration number 6 Signature Date Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 2 of 84 DRAFT Yes No N A Yes No N A Yes No N A Inspections Inspection shall be made in accordance with requirements of the local health department The inspection of the system installation and or plans is to verify that the system at least conforms to specifications listed Approval or denial is for covering of the system only Final approval to use system will not be granted until all required information has been submitted to LMAS Affidavit letter signed by designer attesting to compliance with approved specifications Copy of the final inspection approval from the Michigan Department of lectrical Division
21. al isolation distances which should be maintained from the toe of the mound fill Depth of Fill The depth of fill must be such that the bottom of the distribution cell is isolated gt 3 feet above established high ground water elevation or limiting layer Limiting layer includes soils with an expected permeability above 60 minutes inch based on soil texture and structure The minimum depth f fill at the outer edge of the distribution cell area shall be 12 inches The approved plan shall indi ate the location of a suitable benchmark to be used by the contractor during construction to judge that the Pressure Distribution System Pressure distribution of effluent is required in the distribution cell to promote maximum achievable treatment and is critical from a hydraulic standpoint especially where slowly permeable soils are encountered Pressure distribution system design should generally comply with currently accepted design practice including the following features Septic tank effluent filters or screen pump vaults are necessary Small frequent doses to the mound by means of time dosing to promote unsaturated flow and enhanced treatment and hydraulics are required Design shall provide uniform doses with no more than 0 5 gallons per orifice per dose Distribution cell area per orifice shall not exceed 12 ft To reduce orifice plugging high head pumps are recommended Orifice shields should be provided 44 Mini
22. ary treatment unit may be conducted unless under the direct supervision of an Approved Alternative System Distributor Installer f All secondary treatment systems shall be equipped with a telemetry control panel which is attached to an internet based interface that provides continuous remote monitoring information management and control of the secondary treatment unit Sites that do not have a telemetry control panel must use an active phone line equipped with an auto dialer to notify the authorized service provider of alarm conditions including if power to any of the system equipment is disconnected The system should also include a control panel that tracks at a minimum pump elapsed time cycle counts and high level alarm counts or other means to determine flow through the system and other system Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 14 of 84 DRAFT information for troubleshooting purposes as recommended by the manufacturer 2 Dispersal Mound Components b Fill Requirements Include i The texture of the fill material shall be a stratified sand and gravel or medium sand with a permeability rate of from 3 10 min in A qualitative field check to assess the layer Total depth of fi benchmark provided design plan c Sizing i For dispersal mounds utilizing at least 2 ft of fill sand sizing will be based on the permeability rate of 3710 min in Dispersal Mound System Sizing Require
23. astewater treatment or an LMAS approved secondary treatment distributor installer shall provide design for each specific application i No system shall be designed in a manner which does not meet the manufacturer s minimum recommendations 3 Copy of the signed alternative treatment system contract along with proof of filing Filing should not take place until plan has been approved Filing must occur prior to issuance of permit 4 Maintenance contract signed by both the owner and service provider 5 Plans will not be reviewed until all required components described herein are submitted with the application fee LMAS shall conduct a review of all applications design plan submittals within 30 days of receipt and will issue a written response to the applicant Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 13 of 84 DRAFT D Deed Restriction E Sewage Treatment Components 1 Secondary Treatment Unit a Any secondary treatment units that are not on the most current LMAS District Health Department approved list will not be considered under this manual see Appendix H Approval for use in the district is required prior to the application process Product outlet side of the unit between the unit and the dispersal mound e Only an Approved Alternative System Distributor Installer shall install the secondary treatment system and must be present at all times during the installation No work on the second
24. at retains less water and resists root penetration Soils with high clay content are more easily compacted than sandy soils Soil Loading Rate The allo le application rate to the basal area fequired for flow regime Vertical Separation The total depth of unsaturated soil that exists between the infiltrative surface of a distribution cell and a limiting layer 6 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 34 of 84 DRAFT INTRODUCTION When properly sited designed constructed operated and maintained pressure mounds provide a proven effective alternative method of on site treatment A pressure mound system relying on subsurface distribution to in situ soils can be an effective solution where site conditions are not suitable for conventional treatment and disposal systems Typical situations where mound systems might be applied include Permeable or slowly permeable soils with a high groundwater elevation Treated effluent is discharged and dispersed into the uppermost soil horizons which are typically more permeable The mound sand fill media provides additional treatment which minimizes clogging of the slowly permeable soils while maintaining their hydraulic conductivity Utilizing pressure distribution promotes unsaturated flow resulting in more efficient treatment extended life of the system and improves overall hydraulic performance by minimizing groundwater mounding Ex
25. ation and maintenance contract with an approved maintenance service provider for the life of the system Approval of the contract shall be made by the department prior to the issuance of the permit A list of approved maintenance service providers is available upon request In the event the maintenance service provider under contract fails to perform the property owner is responsible to make arrangements with another approved maintenance service provider who is qualified to maintain their particular type of treatment unit If there are no other maintenance service providers available to provide service to a particular brand of treatment unit then the homeowner will be responsible to contact the manufacturer in an attempt to continue with the required service 2 Failure to maintain a maintenance contract is a violation of the permit and will result in enforcement action against the property owner and revocation of the operating permit 3 All treatment systems shall be maintained according to the manufacturer s specifications 4 The distributor installer shall provide the manufacturer s operation and maintenance manual to the homeowner Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 16 of 84 DRAFT 5 Secondary treatment systems shall be inspected by an Approved Maintenance Service Provider on the following schedule at a minimum a Once within 30 days following initial system start up b Twice per year for the
26. atment unit or shall use an active phone line equipped with an auto dialer to notify the authorized service provider of alarm conditions including if power to any of the system equipment is disconnected The system should also include a control panel that tracks at a minimum pump elapsed time cycle counts and high level alarm counts or other means to determine flow through the system and other system information for troubleshooting purposes D The manufacturer must provide assurance that continued consultation and service will be provided in the event that the distributor should fail to meet with required oversight or in the event that the distributor should go out of business E The manufacturer distributor must demonstrate the capabilities of providing adequate training and certification of installers and maintenance Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 21 of 84 DRAFT providers They must also be conveniently available for consultation both on and off site F The manufacturer must demonstrate that they are a viable company with proven technical expertise in the wastewater industry and capable of providing assurance of product reliability and backing in the event of product poor performance G The manufacturer must have an established hands on training program for prospective designers installers and service providers in the proper design installation and maintenance of their system Video training
27. cessively permeable soils or creviced bedrock Excessively permeable natural soils or shallow soils over creviced bedrock present distinct concerns related to contamination of groundwater supplies or surface waters In conjunction with a comprehensive evaluation of site specific environmental and or public health concerns mounds may be evaluated as a potential treatment alternative to minimize adverse impacts 7 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 35 of 84 DRAFT SITE SUITABILITY Those sites meeting the following criteria for the initial replacement and greenbelt areas may be considered for pressure mounds Soils undisturbed natural soils only Historical agricultural activities are not generally considered as disturbance Soil texture and structure the most limiting horizon encounfered in the upper soil texture and structure as shown in Table 1 18 inches 8 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 36 of 84 DRAFT SITE EVALUATION AND PLANNING A critical step in the successful application of mound technology is the site evaluation and planning process This step provides the site specific information necessary to evaluate overall site suitability and is used as the foundation for actual design Prior to completing the site evaluation available site specific information related to soils slopes etc shouldbe reviewed in detail For the majo
28. e The sand fill media uses vertical separation to provide the fabri that is installed between the Aggregate and soil cover u i the movement of ilt and clay into aggregate filter media Required specifications for use in absorption systems are found in Appendix A An alternative method of On site sewage treatment and disposal in which sand fill media is laidjon top of prep riginal soil surface sand fill media uses vertical separation to provide the necessary treatment Pumps are not utilized for this type of system The effluent out of the septic tank flows by gravity to the absorption system installed on top of the sand fill The area measured horizontally down slope from the edge of the final treatment system which is maintained undisturbed prior to during and after construction so as not to impede lateral movement of effluent A representative of the LMAS District Health Department This may include the Health Officer Environmental Health Director and or Sanitarian Any horizon or condition in the soil profile or underlying strata which will interfere in any way with the treatment of sewage effluent before entering the ground water table Such horizons include hardpans fragipans clay layers compacted soils bedrock saprolite clay content soils and permanent and Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 5 of 84 DRAFT perched ground water tables which may be visible by
29. eserve Area An area of land with site conditions deemed suitable for the installation of a replacement system upon failure of the initial system Sand Fill Sand meeting specific criteria regarding particle size and installation technique to ensure adequate wastewater treatment Sanitary Sewage Water and contaminants discharged from sanitary conveniences including bathroom kitchen and household laundry fixtures of dwellings office buildings industrial plants commercial buildings and institutions Commercial laundry wastes and industrial and commercial processes are not considered sanitary sewage Septic Tank A watertight pretreatment receptacle receiving the discharge of sanitary sewage from a building sewer or sewers designed and constructed to permit separation of settleable and floating solids from the liquid detention and anaerobic facultative digestion of the organic matter prior to discharge of the liquid 5 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 33 of 84 DRAFT Slowly Permeable Soil Soils with a textural classification according to the U S Department of Agriculture Soil Conservation Service classification system of silt loams and some silty clay loams that are well structured with expected permeability above 60 minutes inch Soil Compaction An increase in the soil bulk density and decrease in soil porosity by the application of mechanical forces to the soil that results in a soil th
30. esidential sewage treatment and commercial systems discharging less than 1000 gpd This is a working document and modifications may be made as deemed necessary by the LMAS District Health Department tf Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 2 of 84 DRAFT MINIMUM REQUIREMENTS FOR ALTERNATIVE ON SITE SEWAGE TREATMENT SYSTEMS UPDATES AND PAGE NUMBERS NEEDED Table of Contents I Alternative On Site Sewage Treatment Systems 4 A General Information 4 B Definitions II Site Criteria A Parcel Size III Site Preparation IV V Dosing Chamber and Effluent Pump Requirements A B VI Moratorium VI Design Parameters for Alternative Treatment Not Utilizing Secondary Treatment A Description B Conditions for Application Submittal C Sewage Treatment Components a Site Preparation b Septic Tank c Dosing Chamber and Effluent Pump d Mound Components D Moratorium VII Design Parameters for Systems Utilizing Secondary Treatment Description Conditions for Application Submittal Design Approval Deed Restriction Sewage Treatment Components a Secondary Treatment Unit b Dispersal Mound Components i Fill Requirement ii Sizing mC Ga i Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 2 of 84 DRAFT iii Side Slope iv Observation Ports Start up Maintenance and Monitoring Noncompliance Monitoring ITON IX Seasonal Use Requirements for S
31. her anticipated home construction activities is encouraged Soil smearing and compaction which can reduce infiltration capacity will occur if soils are worked on when wet Construction activities Acceptable Cleanliness of sand fill should be checked prior to installation Placement of fill material then is to be accomplished from the end and upslope sides utilizing a tracked vehicle or equipment with adequate reach to minimize soil compaction A minimum of six inches of fill material should be maintained below the tracks to minimize compaction Wheeled vehicles should be prevented from travel over the mound basal area and downslope greenbelt area Total depth of fill Shall be established based on a benchmark provided by the design consultant on the design plan IV Septic Tank Requirements a b C Tank requirements are established in Section 5 12 of the LMAS District Health Department Superior Environmental Health Code If conditions exist that will not allow for the first tank to be sized at 1000 gallons a variance shall be applied for during the application process that will indicate how the required capacity will be maintained Garbage grinder disposal use is prohibited on systems utilizing secondary treatment An effluent filter shall be required on the outlet baffle of the last septic tank if more than one with the handle extended to within 12 of the top of the riser It is recommended that a minimum size f
32. il Example of Test Jar Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 5 of 84 DRAFT Sandy Soil Sandy soils are typically comprised of approximately 80 100 sand O 10 silt and O 10 clay by volume Sandy soils are light and ypically very free draining usually holding water very poorly due to ery low organic content Loam soils are typically comprised of approximately 25 50 sand 30 50 silt and 10 30 clay by volume Loam soils are somewhat heavier than sandy soils but also tend to be fairly free draining again due to typically low organic content NOTE If after settling a perceptible layer of fines greater than 1 8 inch in thickness has accumulated on the surface the fill material should not be considered clean enough and an alternate source should be explored Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 6 of 84 DRAFT s i i a Appendix G Typical Observation Port Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 7 of 84 APPENDIX G DRAFT Minimum Fabric Distribution Pipe me erni TYPICAL OBSERVATION PORT 4 Perforated Inspection Pipe Open Bottom f 84 DRAFT a i a Appendix H Approved Distributors Installers of Secondary Treatment Units Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 9 of 84 DRAFT Approved Distributors Installers of
33. ill depth C at the upslope edge of the distribution cell In this case the depth of fill C at the upslope edge of the distribution cell will be the fill required to elevate the stone three feet above high groundwater elevation or limiting layer which is feet Step 7 Determine the mound fill depth D at the downslope edge of the distribution cell For a given slope the following can be used D C slope x A Note express slope as decimal i e 4 0 04 1 x ft 2392 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 60 of 84 DRAFT Step 8 Determine mound depths E and F E ft total depth of stone F ft amount of final cover Step 9 Determine the downslope width I Using a recommended side slope of 4 1 the calculations is as follows 0 100 4 x 0 100 4 x follows Upslope Correction factor 100 side slope x slope 100 100 4 x slope 100 100 4 x C E F x upslope correction factor Pea Step 11 Determine the end slope length K Using a recommended side slope of 4 1 the calculations is as follows K 4 C D 2 E F A t 2t t E ft 233 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 61 of 84 DRAFT Step 12 Determine the overall width W and length L of the mound fill W A l J F ft Distribution Cell POPEPEPL PED EEE LETT
34. ilter of Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 8 of 84 DRAFT 6 diameter be used An effluent filter is not required on systems utilizing secondary treatment d Watertight securable riser to grade is required for the outlet hatch over effluent filter e Septic tanks and dosing chambers shall not be placed within natural swales or other areas of natural water movement f The septic tank dosing chamber and or secondary treatment unit shall be placed on a stable level surface A minimum of 4 inch uniform base V Dosing Schedule 40 Polyvinyl Chloride PVC pipe shall be septic a e dosing ch iii Consideration for a weep hole may be necessary depending on the distance between the dosing chamber and the filter media If a weep hole is not installed the discharge pipe should be installed below the frost line with a check valve in the discharge line b Effluent Pump i Pump size and make shall be determined by the design consultant and included on the plans submitted to LMAS 1 All electrical components and connections must be inspected in accordance with state or local codes 2 Timers control panels appropriate to the design of the system shall be installed Timers control panels are used to assure proper functioning of the mechanics of the system prevent overloading of the filter media and reduce odor production A low level off control must be installed in conjunction with the time
35. ive Field Test of Sand Cleanliness 000 21 Figure 5 Observation Port Example Details cceeeeeeeeeeeee eee es 22 Table 1 Allowable Soil Loading Rates ccececeeee eee ee rererere 23 Table 2 Minimum Horizontal Isolation Distances eeeeeeee ee eee 24 Appendix B Design Example iscieneccusa ies cdieacscastaiiatie ears aan sreecemeeeraes 25 Appendix C Mound Maintenance Visit Checklist ceceeeeeeee eee eeeeeees 29 Appendix D Mound Design Worksheet 0 ceceeeee eee eee ee eee eee eeeeeeeeeeees 31 Eegi Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 31 of 84 DRAFT DEFINITIONS Alternative System A treatment and disposal system that is not a conventional system and provides for an equivalent or better degree of protection for public health and the environment than a conventional system Approved A written statement of acceptability issued by the local health officer or the effluent to subsurface soil trenches or an absorption Cover Material The material used to cover A mound system usually selected on its availability cost and ability to support vegetation transfer oxygen and shed water Distribution Cell ithin the mound where the effluent is distributed into the fill material Effluent Liquid discharged from a septic t component other on site sewage system Exc coarse sands 2 0 mm and
36. larger and often including fine gravels and or cobbles Water passes through the soil very rapidly i e soil permeability lt 3 minutes inch and internal free water is very rare Greenbelt Area The area measured horizontally downslope from the edge of the mound fill which is maintained undisturbed prior to during and after construction so as not to impede lateral movement of effluent High Groundwater Elevation The uppermost part of the soil or underlying material wholly saturated with water The term includes perched and apparent conditions that are seasonally saturated for a time period in excess of two weeks or permanently saturated Hydraulic Linear Loading Rate The volume of effluent applied per day per linear foot of system along the natural ground contour Influent Wastewater flowing into an on site sewage system component In Situ Soil Soil present in the natural or original position Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 32 of 84 DRAFT Limiting Layer High groundwater elevation soils with an expected permeability above 60 minutes inch or bedrock Original Grade The natural land elevation which exists immediately prior to the construction of the mound system Permeable Soil Soils with a textural classification according to the U S Department Permeabili direction e or other pretreatment process that contains a pump floats and volume for storage of effluent R
37. ll Septic Tank i Prepared Natural Ground Surface Dosing Tank Effluent Filter Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 45 of 84 DRAFT Figure 2 Typical Site Plan 18 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 46 of 84 DRAFT Figure 3 Mound Plan View and Cross Section Ea a Observation Port Distribution Cell PUELEEELEEEEELEEELEEE 5 OE SOELEEEEEE POPEEPEEPELEEELEELEEEEEELEEELESEES Prepared Natural Ground oO Surface slope Legend A Distribution cell width B Distribution cell length C Up slope fill depth under distribution cell D Downslope fill depth under distribution cell E Distribution cell depth F Depth of final cover Distance from edge of distribution cell to downslope edge of fill J Distance from edge of distribution cell to up slope edge of fill K Distance from end of distribution cell to edge of fill L Overall mound fill length W Overall mound fill width 19 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 47 of 84 DRAFT Figure 4 MDOT 2NS Sand Specification Percent Percent Passing Passing Grain Size mm Sieve Size 100 95 65 35 20 10 0 0 9 52 4 76 38 1 19 0 59 0 297 0 149 0 07 3 8 IEVE SIZE 50 10 100 80 60 40 20
38. lternative Treatment System A treatment and disposal System which is Basal Area The effective undisturbed natural soil surface area available to transmit the treated effluent from the sand fill media into the original receiving soils Conventional Sewage System An on site sewage system containing a septic tank used in conjunction with absorption trenches or an absorption bed that utilizes gravity distribution The effective soil depth or depth to seasonal high water table must be a minimum of twenty four inches 24 from the natural grade in stratified sand gravel medium sand eighteen inches 18 in fine sand loamy sand twelve inches 12 in sandy loam loam silt loam sandy clay loam Design Consultant The person responsible for designing the construction plans for alternative on site sewage treatment systems This can include depending on type of system Michigan Registered Sanitarian Professional Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 4 of 84 DRAFT Elevated Mound pump and dump Geo textile Fabric Gravity Mound Greenbelt Area Health Officer Limiting Layer Engineer specializing in environmental or sanitary wastewater treatment LMAS approved secondary treatment distributor installer or LMAS licensed septic installer An alternative method of on site sewage treatment and disposal in which sand fill media is laid on top of properly prepared original soil surfac
39. lth hazard 3 If compliance with the conditions in which the secondary treatment unit and or associated dispersal component s was permitted under cannot be achieved or if LMAS determines that the Superior Environmental Health Code has been violated a notice of violation will be issued to the owner fee schedule LMAS shall be Code resultsAn an imminent health hazard infrequent occupancy B Site Description 1 Systems not in use for more than one month and less than three months Electrical power is left on and there are not frost conditions a Requirements i Leave air pump on and system running 2 Systems not in use more than three months Electrical power is turned off and there are not frost conditions a Requirements i While system is operating with the air pump on remove all material and liquid from the tank ii Refill the tank with clean water iii Turn off air pump 3 System not in use more than three months Electrical power is on and there are not frost conditions a Requirements i Leave air pump on and system running OR ii While system is operating with the air pump on remove all material and liquid from tank iii Refill with clean water iv Turn off air pump Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 19 of 84 DRAFT 4 System not in use Electrical power is turned off and there are frost conditions a Requirements i While the system is operating with
40. luate the soil profile and site description for maximum soil loading rate and hydraulic linear loading rate From the soil profile description there are indications of a seasonal high groundwater elevation at 18 inches The most limiting soil horizon in the upper 18 inches from a texture and structure standpoint is brown medium sand with weak granular structure Using Table 1 the soil loading rate and linear loading rate are selected Soil Loading Rate SLR 1 0 gpd ft Linear Loading Rate LLR 5 0 gpd lineal foot 25 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 53 of 84 DRAFT Step 3 Select the sand fill loading rate and calculate the distribution cell width A The maximum sand fill loading rate for septic tank effluent is 1 0 gpd ft For this example the maximum rate will be used Use of this rate is based on the assumption that the sand fill under the distribution cell will meet the requirements of Figure 4 and that a factor of safety has been provided in design flows as discussed in Step 1 The width of the distribution cell A can then be calculated as follows IW Design flow soil loading rate x B 450 1 0 x 90 5 ft For this example the infiltration width and distribution cell width A are equal For other situations where the most limiting horizon is less permeable it will be found that the infiltration width will exceed width of the distribution cell The infiltration
41. ments Fill Sand Permeability Application Rate Minimum Absorption gpd ft Area Ft 2 Bedroom ei 1 3 the design consultant on the Stratified sand 20 6 0 3 10 and gravel Med sand iii For dispersal mounds utilizing natural soil sizing will be based on the following permeability rates Native Soil Gravel Pipe System Texture Structure gal ift2 day ibadroon Medium Sand 1 3 115 Fine Sand Loamy Sand 0 9 170 Sandy Loam 0 6 250 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 15 of 84 DRAFT Loam Silt Loam 0 5 300 Sandy or Silty Clay Loam 0 3 500 Clay Loam 0 2 750 d Side Slope The final side slope on the dispersal mound shall be 4 1 or flatter Final grading of the mound area should divert surface water drainage away from the mound e Observation Ports At least one observation port to gauge ponding depth in the absorption field is nec ssary see appendix G f Cover Geotextile fabric shall be Used between the top of the ston and soil cover see appendix A Thejabsorptign area shall be covered with sufficient suitable soil to maintain vegetation growth and seeded mulched upon completion If system is constructed after September 15 a I Start up J Maintenance and Monitoring specified by the LMAS District Health operati f treatment sy f 1 Each secondary treatment system shall have an oper
42. mum Requirements for Alternative On Site Sewage Treatment Systems Page 39 of 84 DRAFT Provisions for flushing must be incorporated at the ends of all laterals Geotextile fabric which prevents the downward migration of fine materials but allows for free passage of air and water should be placed over the stone in the distribution cell prior to placement of final cover Sand Fill Requirements It is important that the specification of the sand fill material be closely controlled from both a performance and longevity standpoint From a distribution ell is negessary Where the distribution cell is divided into multiple zones at least one per zone is required 12 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 40 of 84 DRAFT SITE PREPARATION AND CONSTRUCTION Ultimate success or failure of a mound also relies on a clear communication and understanding of basic site preparation and construction principles Critical issues include Proper procedures must be followed to protect the mound area including required greenbelt area during and after construction After establishing a suitable location for the mound and replacement area including greenbelt area if should be suitably fenced or otherwise unmistakably identified to prevent further disturbance until that is isolated from ot anticipated home construction activities is encouraged ly prepared ughening ina ridge and furr
43. n time meters vii Homeowner education in 1 Product Use 2 Proper maintenance tion including T ID number LMAS for review to ensure that all necessary information is included This should be done prior to using the form K Noncompliance Monitoring 1 The owner is responsible for the proper operation and performance of the system If additional monitoring is required the owner shall be responsible for all costs associated with this monitoring and or system repair 2 Inthe event that the secondary treatment unit or associated dispersal component s are found to be in noncompliance with the requirements in which it was permitted the following actions must be taken at the owners expense a The approved maintenance provider shall inspect the system in the presence of LMAS staff and correct any dieficiencies noted b If LMAS deems necessary samples shall be taken to determine compliance These samples include but at not limited to BOD TSS and FC Total Phosphorous shall be sampled if the system is within 500 ft of a body of water c The maintenance service provider shall report to the department at the completion of inspection and or servicing Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 18 of 84 DRAFT d Use of the system may need to be discontinued if the system malfunctions and is found to be non repairable or is non compliant with the permit and results in an imminent hea
44. nt third party certification shall be required if the designer and installer are the same individual or related company where a conflict of interest may be present f Copy of the final inspection approval from the Michigan Department of Labor Electrical Division Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 20 of 84 DRAFT 2 After all required information has been submitted LMAS shall issue a final approval operating permit to the applicant XIII Revocation of Approval A The department may revoke any plan approval under this Section when one or more of the following conditions exists 1 The location of the system s specified in the design is altered 2 There is an increase in the scope of the project prior to during or following construction 3 LMAS acquires new information indicating that any agency rules or XIV solids Treated effluent must meet the following criteria 1 BOD less than or equal to 30 mg L 2 TSS less than or equal to 30 mg L 3 Total inorganic nitrogen less than or equal to 25 mg L 4 For discharges within 500 ft of a body of water total inorganic nitrogen less than of equal to 10 mg L and total phosphorous less than or equal to 2 mg L C All secondary treatment systems shall be equipped with a telemetry control panel which is attached to an internet based interface that provides continuous remote monitoring information management and control of the secondary tre
45. o identify laterals Lateral 1 Latera Lateral 4 Lateral 5 Lateral 6 After flushing all lines make head measurement at the end of the line farthest from the pump Note head and compare with previous records if available of how residual head in the system is supposed to be set If head is more than 20 percent above previous value bottle brush the lines or otherwise clean and measure head again Note final head ft 30 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 58 of 84 DRAFT APPENDIX D Mound Design Worksheet Site Criteria 1 Soil Profile Depth to Limiting Layer inches Limiting Layer texture structure grade Using Table 1 the soil loading rate SLR and linear loading rate LLR are selected Soil Loading Rate SLR gpd ft Linear Loading Rate LLR gpd lineal foot Step 3 Select the sand fill loading rate and calculate the distribution cell width A The maximum sand fill loading rate for septic tank effluent is 1 0 gpd ft For this design the following rate will be used gpd ft The width of the distribution cell A can then be calculated as follows 31 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 59 of 84 DRAFT A Linear Loading Rate Sand Fill Loading Rate gpd ft gpd ft ft Step 4 Determine the distribution cell length B B Design Flow Linear Loading Rate Step 6 Determine mound f
46. of ways 5 The applicant is responsible for contacting other permitting agencies prior to obtaining any permits from the LMAS District Health Department 6 Isolation from the absorption system shall be measured from the perimeter of stone D Topography Areas with 12 or greater slope are to bej avoided Required Downslope e It feet Medium sand Not Required Fine sand Loamy Sand 10 Very Fine Sand Sandy Loam 20 Loam Sandy Clay Loam 30 Clay Loam Silty Clay Loam 40 Silty Clay Sandy Clay Clay Unsuitable E Minimum Soil Conditions 1 The effective soil depth or depth to seasonal high water table limiting layer must be a minimum of six inches 6 from natural grade III Site Preparation A Ultimate success or failure of a mound also relies on a clear communication and understanding of basic site preparation and construction principles Critical issues include a Proper procedures must be followed to protect the mound area including required greenbelt area during and after construction After Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 7 of 84 DRAFT establishing a suitable location for the mound and replacement area including greenbelt area it should be suitably fenced or otherwise unmistakably identified to prevent further disturbance until actual construction can occur Site planning resulting in a location for the mound that is isolated from ot
47. ow fashion with ridges following the contours Methods that can be considered for roughening include chisel teeth fastened to the backhoe bucket plowing with a multiple bottom agricultural chisel plow or moldboard plow Rototilling is not acceptable Sand fill material should be applied immediately after roughening and prior to any subsequent precipitation Cleanliness of sand fill should be field checked prior to installation Placement of fill material then is to be accomplished from the end and upslope sides utilizing a tracked vehicle or equipment with adequate reach to minimize soil compaction A minimum of six inches of fill material should be maintained below the tracks to minimize compaction Wheeled vehicles should be prevented from travel over the mound basal area and downslope greenbelt area Total depth of fill shall be established based on a benchmark provided by the design consultant on the approved plan Final grading of the mound area should divert surface water drainage away from the mound Sod the entire mound area or seed and mulch 13 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 41 of 84 DRAFT OPERATION AND MAINTENANCE The system owner is responsible for assuring the continuous operation and maintenance of the system Deed advisories need to be recorded to communicate to the system owner and subsequent future owners the importance of routine and regular maintenance activities It is
48. r A visual alarm shall be installed ii A quick union disconnect shall be installed in the riser required of the dosing chamber to remove the pump if Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 9 of 84 DRAFT necessary This shall be located within 12 of the top of the riser iii Grinder pumps are regulated by Plumbing as they are installed prior to the septic tank VI Moratorium A A moratorium on installations will exist between October 15 and June 1 without express written approval from the LMAS District Health Department and the design consultant B Installation of the alternative treatment system is limited to certain d times of the year as approved by the LMAS District Health Department VII Design Parameters For Alternative Treatment Not Utilizing Secondary Treatment A Description A soil absorption system consisting of a septic tank dosing chamber if applicable and an elevated absorption system mound To adequately treat wastewater Mounds should be as long and narrow as the site permits regardless pressure distribution shall refer to the DEQ Pressure Mound Guidance Appendix C B Conditions for Application Submittal 1 Provide a scaled site plan detailing the proposed work along with the LMAS District Health Department application form refer to Submittal Checklist for Alternative Treatment Appendix D iv Plans shall be at least 8 1 2 x 11 in
49. rity of counties oximor Soil structure grade and shape Occurrence of saturated soil groundwater bedrock or disturbed soils Site planning for development sites less than one acre subdivision lots or site condominium units must also consider the following features Property lines and lot lines Slope Required setback distances Existing or proposed structures Existing or proposed wells Surface waters For projects involving multiple lots or units overall planning should also consider and mitigate any negative impacts from other off lot development activities including grading road construction and surface water drainage 9 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 37 of 84 DRAFT DESIGN Sufficient design detail must be provided for a development site less than one acre subdivision lot or site condominium unit to assure that adequate suitable area is available for construction of initial and reserve mound systems and required greenbelt areas These areas must be at locations that are readily accessible for construction and for future maintenance and repair A proper design must allow for the home and any proposed improvements while maintaining required setbacks The following design criteria are recommended Design Flows For design purposes an allowance of 150 gallons per day per bedroom Mound Orientation The absorptive area should be long and narrow with
50. rogram June 2003 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 29 of 84 DRAFT PREFACE The technical guidance contained in this document has been developed for statewide application pursuant to R 560 424 2 of the Michigan Department of Environmental Quality Administrative Rules On site Water Supply and Sewage Disposal for Land Divisions and Subdivisions This technical guidance represents minimum standards for application of the described alternative method of sewage treatment and disposal for a development site less than one acre and formal a Quality lot deemed sg system defining minimum site suitability and design and long term operation and maintenance requirements considered essential for the proper functioning of specific alternative systems 3 The owner may utilize an alternative system if the specific alternative is provided for under the regulations of the city county or district health department having jurisdiction and if the department of environmental quality has authorized the alternative system s use oe Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 30 of 84 DRAFT TABLE OF CONTENTS DOETINITION Ss iex css sae nceseeiee eed bed bear Sebd a SeH ING bod EEE ac dgeeaes Headset EE 4 TFODUCHIOMN 22254 saiew send a aa a bin nei das a a aAa an s esaad daat khoa aidd ki 7 Site Suitability Site Evaluation and Procedure for Qualitat
51. s of the sand delivered to the construction site also be conducted The following procedure is suggested Here s what you ll need e 1clean quart jar and tight fitting lid e clean water e soil sample First find anjempty clean quartyjar anjold mayonndise jar works ver this test Fill the jar about 2 3 full with clean water Next take a sample of break the large clods apart so it will fit through the jar opening and fill the jar and water until the jar is nearly full leaving about of air space at the top Screw on the lid and shake it vigorously for a minute or two until all the soil particles are broken down into suspension in the water Now allow the suspended soil to settle for about a minute and place a mark on the side of the jar at the top of the layer that has settled out This is the sand layer is comprised primarily of sand and larger particles Set the jar aside being careful not to mix the sand layer that has already settled and wait approximately an hour Now place a mark on the side of the jar at the top of the next layer to settle out This is the silt layer Again place the jar aside for a full day being careful not to shake or mix the layers that have settled out After 24 hours or when the water is once again clear more or less place a mark on the side of the jar at the top of the final layer This is the clay layer The percentage of each layer tells you what kind of soil you have Type of So
52. size and shall be legible clear and permanent copies v Plans shall include name of person who prepared plan and shall be stamped if prepared by a Michigan Registered Sanitarian or Professional Engineer vi Signed copy of Submittal Checklist for Alternative Treatment see Appendix D 2 A Michigan Registered Sanitarian Professional Engineer specializing in environmental or sanitary wastewater treatment or licensed sewage system installer registered with LMAS to design install and monitor construction of alternative treatment systems shall provide design for each specific application 3 LMAS shall conduct a review of all application design plan submittals within 30 days of receipt of all required items C Sewage Treatment Components Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 10 of 84 DRAFT 1 Mound Components b Fill Requirements Include i The texture of the fill material shall be a stratified sand and gravel or medium sand with a permeability rate of from 3 10 min in A qualitative field check to assess the cleanliness of the sand delivered to the construction site should be conducted see Appendix F ii Fill shall be free of debris stones frozen clods or ice iii The material shall be cdmpacted to avoid ettling or allowed to settle through one fall winter period Settling through the fall winter r V the established hi layer with the ex eption of pressure distribu
53. suggested that a maintenance inspection be conducted on an annual basis by a trained maintenance provider The local health department or other management entity may require oversight of the on site system by a properly certified operator In such cases the operator must be responsible for the continuou operation and maintenance of the system and must submit appropriate records routinely to the local health or other appropriate jurisdiction Routine and preventative maintenance aspects are A good water conservation plan within the house or establishment will help assure that the mound system will not be hydraulically overloaded Avoid traffic in the initial and replacement mound areas and downslope greenbelt area No vehicular traffic or livestock should be permitted With lawn care equipment such as a riding lawn mowers or tractor it is important not to travel on the mound or the downslope area when the soil is saturated Winter traffic on the mound should be avoided to minimize frost penetration in colder climate areas and to minimize compaction in other areas Owner s Manual A user s manual needs to supplement the construction plan and must be submitted to the local health department for final approval A copy of this manual must be provided to the property owner after completion of the mound system The manual needs to contain the following as a minimum 1 As built drawings of all system components and their location are to be
54. the air pump on remove all material and liquid from the tank ii Turn off air pump iii Remove all material from septic tank iv Fill both tanks with clean water to prevent buoyancy 5 UNDER NO CIRCUMSTANCES SHALL THE AIR PUMP BE TURNED OFF FOR MORE THAN A FEW DAYS WITHOUT REMOVING TANK CONTENTS certification the distributor installer shall cheek the wai document C When a completed permiti application design area deemed acceptable LMAS shall issug a construction permit XI Limitation of Responsibility A Plan approval by LMAS may not be construed as an assumption of any responsibility for the design of the Alternative Treatment System and associated dispersal component s B LMAS does not hold itself liable for any defects in design and or construction or for any damages that may result from a specific installation XII Final Inspections and Approval to Use System 1 A final inspection shall be conducted by LMAS in accordance Section 5 15 of the LMAS District Health Department Superior Environmental Health Code During this inspection LMAS will approve or deny covering of the system Approval to use the system will not be granted until all required information has been received e The Design Consultant shall provide the LMAS District Health Department with written certification that the installed system meets their design and the intent of the minimum requirements contained within this document Independe
55. the long dimension running parallel to the contour for a sloping site Soil Loading Rate The minimum mound basal area required for absorption of effluent is based upon soil texture for a given soil structure Table 1 suggests recommended maximum soil loading rates based upon the most limiting soil texture and structure encountered in the upper 18 inches of the soil profile The basal area for sloping sites i e those with slopes gt 2 percent includes the area under the distribution cell and area downslope only On flat sites i e those with slopes lt 2 percent the minimum required basal area includes that under the distribution cell and either side of it Generally the minimum required basal area will be found to be less than the actual area filled after accounting for required depth of fill and side slopes Hydraulic Linear Loading Rate The hydraulic linear loading rate is the volume of effluent applied per day per linear foot of system along the natural ground contour From a hydraulic standpoint a long and narrow mound design is most efficient and better promotes aerobic conditions under the distribution cell Table 1 suggests recommended maximum hydraulic linear loading rates based upon the most limiting soil texture and structure encountered in the upper 18 inches of the soil profile 10 Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 38 of 84 DRAFT Setbacks Table 2 summarizes minimum horizont
56. tion dept abli provided by the design consultamt orrthe design plan c Sizing i For mounds constructed with 4 ft of fill sizing will be based on the permeability rate of 3 10 min in Mound Gravity and Elevated System Sizing Requirements B makar Stratified sand 20 6 0 and gravel Med sand ii For mounds utilizing natural soil to achieve the minimum 4 ft vertical separation the following permeability rates will be used Application Rate Minimum Absorption Area ft Bedroom Mound Sizing Requirements Native Soil Texture Permeability Application Rate Minimum Absorption Structure gpd ft Area Ft 2 Bedroom imme in e M E Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 11 of 84 Fine sand 6 0 3 0 11 20 Loamy sand Sandy loam 3 0 2 0 21 30 375 400 Loam Silty loam 2 0 1 35 31 45 3 Sandy clay l loam Clay loam Siltyfclay loam Silty clay loa absorption system on sites where the native soil has a permeability greater than or equal to 3 inches per hour ii Extend a minimum of 10 ft beyond all sides of the absorption system of sites where the native soil has a permeability less than 3 inches per hour e Taper The taper is the slope surrounding the berm Soil texture shall be the same as required for fill material stratified sand and gravel or medium sand The soil shall be evenly graded from the top of the berm to the
57. w 500 GPM sa ft at 8 inches of head d Opening size 70 100Sieve erage foll values unit weight of 1 5 oz yard squared permittivity of 1 0 a second trapeziod tear of 15lbs 2 Fabric shal not be exposed to sunlight for more than 7 days 3 Shall be free of defects flaws or tears that would alter the strength and filtering properties 4 Fabric shall be uniform in texture and thickness 5 Non woven material 6 Must be labeled as Class 3 Geo textile material 7 Minimum of 12 trench or 18 bed of overlap Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 25 of 84 DRAFT Appendix Isolation Distances Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 26 of 84 DRAFT soiation pistances ee eee ae Ea eee Residential Well Well 100 Type IIB Type IIT Community Well Type IIA morte TH a u e Foundation Wall Wall Subsoil Drains Water Lines ce a O O eles eo Lakes or Streams 75 SS ove table the proposed sewage system shall satisfy the ments 1 As summarized in the following isolation requi A Sewer lines from buildings shall be ed a minim m of ten feet 10 from all water wells B Septietanks or be located a mi imum of fifty feet 50 from residential wells seventy five feet 75 from Type IIb non community and Type III water supplies and two hundred feet 200 from
58. ystems Utilizing Secondary Treatment A Purpose B Site Description X Permitting XI imitation of Responsibility XII Final Inspections and Approval to Use System XIII Revocation of Approval XIV Disclaimer XV Product Dis XVI Becoming an Approved Distributor Installer XVII XVIII Licensed Septic Installer Registration Process APPENDICES Appendix A Specifications for Geo Textile Fabric Used in On Site Sewage Systems Appendix B Isolation Distances Appendix C Pressure Mound Systems Appendix D Submittal Checklist for Alternative Treatment Appendix E Determining If The Site Is Too Wet To Begin Construction Appendix F Procedure for Qualitative Field Test of Sand Cleanliness Appendix G Typical Observation Port Appendix H Approved Distributors Installers of Secondary Treatment Units Appendix I Individuals Approved as Qualified Maintenance Providers Minimum Requirements for Alternative On Site Sewage Treatment Systems Page 3 of 84 DRAFT Appendix J Mound Design Worksheet I Alternative On Site Sewage Treatment Systems A General The minimum requirements set forth in this document apply to residential building sites and commercial systems discharging less than 1000 gpd requiring on site sewage treatment and dispo Superior Environmen Sewage System shall requirements B Definitions ta uivalent or better degree of protection for public health and the environment than a conventional system A

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