SUPPLEMENTARY REGULATIONS FOR SEWAGE DISPOSAL SYSTEMS

TOWN OF CARLISLE, MA

In accordance with its authority under M.G.L. c. 111, Section 31 and M.G.L. c. 21A, section 13 and 310 CMR 15.003(3) the Board of Health of the Town of Carlisle enacts the following supplementary regulations.

JUSTIFICATIONS

Title 5 of the State environmental Code sets minimum requirements for the disposal of sewage in unsewered areas. The following supplementary regulations for the Town of Carlisle are keyed to the 1995 Title 5 requirements (310 CMR 15.00 - 15.505)

1. The Carlisle Board of Health feels the long term health interests in our town can only be served by adopting certain regulations which are stricter than Title 5, which was written as a minimum protection standard in 1977, revised in 1995 and designed to cover all towns in Massachusetts utilizing subsurface disposal systems.

2. Carlisle has no town water backup. Unlike a number of Massachusetts towns covered by Title 5, when a residence loses a well to pollution, there is no town water which can be brought in, nor any town wells at all.

3. Carlisle geographically is an area of extensive wetland, high water table, and extensive ledge. Safeguards in the original septic system installations are necessary because alternative repair locations are often unavailable.

4. Carlisle has no sewerage to hook up to in cases of septic system failure.

5. Current estimates indicate that the distance viruses and bacteria travel is much greater than previously estimated. In Carlisle, where groundwater travels some distance through bedrock crevices, pollution may not be adequately filtered in gravel or sand with Title 5 percolation rates used for design.

SUBPART A: GENERAL PROVISIONS

15.002 - Definitions

Soil Absorption Systems - The definition of a soil absorption system includes the trenches, galleries, chambers, pits, field(s) or bed(s) together with effluent distribution lines and aggregate installed to receive effluent from a septic tank and transmit it to the underlying soils. Synonymous with leaching area.

Watercourse - The definition of a watercourse is extended to include a seasonal watercourse. That is, a brook or stream that has a running or flooding condition one season of during a year.

15.020 - Disposal System Construction Permit

Application: The application shall consist of a completed application form accompanied by six (6) copies of the plan for a proposed sewage disposal facility (five (5) copies in the case of a repair) and the required fee. The plan, once approved and initialed by a Board of Health member, is considered a valid permit.

Fees: The application fee for a disposal works construction permit must be paid at the time the plans is submitted. Plans may be resubmitted after revision one time without additional fee. The amount of the fee will be set from time to time by the Board of Health.

15.220: Preparation of Plans and Specifications

TITLE BLOCK 1) Street Address, 2) Assessor’s Map No. And Lot No. for which the design is prepared, 3) Professional seal and signature of designer, 4) If revision plan, revision number, description of revision, and revision date, 5) Address including street number and telephone number of owner.

PLAN VIEW 1) Scale: 1" = 20' or less is mandatory in area of design. 2) 2' topographical contours or less. 3) Benchmark: national vertical datum or other datum on which elevations are based. 4) Locus, lot lines, and dimensions of lot, lot size in acres or square feet and proposed and existing buildings. 5) Pertinent topographic features. 6) All ledge outcropping and ledge encountered in exploratory digging. 7) Results, conditions, and locations of all high water and percolation tests within 50' of the design area (passed as well as failed). These shall be used in the design calculations. 8) Wetland zoning district boundaries on the lot or within 100 feet of the proposed leaching facility even if not on the same lot. 9) Federal Emergency Management Agency (FEMA) flood plain boundaries on the lot or within 100 feet of the leaching facility even if not on the same lot. Design engineer shall verify that the flood plain boundary conforms to the Federal Insurance Rate Map (FIRM), if applicable. 10) Surface drainage features including swales, streams, ponds, wetlands or proposed wetland replication areas on the lot or within 100 feet of the proposed leaching facility even if not on the same lot. 11) Existing and proposed water supplies on the same lot or within 200 feet of the proposed leaching facility even if not on the same lot. 12) Proposed and existing sewage disposal systems and existing systems within fifty (50) feet of the proposed system on abutting lots. 13) Proposed and existing grades at building and in area of sewage disposal system. 14) Location and grading for all existing or proposed driveways on the lot. 15) Drain lines, culverts, and curtain drains on the lot or within 100 feet of the proposed leaching facility even if not on the same lot. 16) All easements must be clearly indicated on the plan. At the option of the Board, evidence of the recording of the easements will be required before the approval signature is given. 17) Materials to be used for the building sewer and distribution piping and type of joint. 18) Details of septic tank, distribution box, and leaching system including dimensions, materials, inverts, and a scaled profile of the system. For pumped systems, the inside dimensions of the pump chamber shall be shown. 19) Invert elevation at both ends of all pipes and at changes in grade. 20) Elevation of foundation, basement, and first floor of proposed or existing buildings. 22) Number of bedrooms designed for, including rooms that could be used as bedrooms. 23) Zoning District in which the lot is located.

PLAN NOTES: 1) The first 2' of pipe from the distribution box shall be set level. 2) The system shall be staked in the field, and benchmark set, by the design engineer. 3) All top and subsoil over the leaching area and between trenches and for a distance of 5' extending around the leaching area in all directions shall be removed and stockpiled before the bottom of bed or trench is excavated, and the 5' excavation shall be shown on the plan. 4) Finished grade over the leaching area shall have a minimum slope of 2%.

All revised plans shall be accompanied by a letter from the designer which details in an itemized form how each of the items in the Board's engineering consultant's review letter were addressed and/or mitigated on the revised plan. Additionally, any issues discussed at a Board meeting and directed by the Board to be incorporated into the revised plan shall be explained in the letter.

The Board of Health reserves the right to revoke an approval that is found to be based on a material misrepresentation of fact.

15.019 Disposal System Installer’s Permit

The Board of Health will administer a written examination. Installers seeking permits are required to take the examination each calendar year. The passing score shall be correctly answering 70% of all the questions on the written examination. An application fee is required for taking the examination. A list of licensed installers will be maintained at the Board of Health office.

15.021 Certificate of Compliance

Only DEP approved forms shall be used. The Certificate of Compliance will not be released without the signature of the design engineer and installer on the DEP approved form.

Inspections and Engineered As-Builts - An agent designated by the Board of Health will inspect the sewage disposal system at four (4) phases of its construction: 1) After excavation is complete but before any stone or fill is placed; 2) For a fill system fill material must be inspected and approved prior to placement and following placement of sand (if deemed necessary by the inspector at the time of the excavation inspection); for systems not in fill, the bottom of each trench must be inspected and approved before the installation of stone and piping; 3) After all components are installed but before any component is covered, at which time two copies of an as-built survey performed by the design engineer shall be submitted and the system shall not be backfilled until the designer has submitted at least the following: plan of the as-built showing the horizontal location of all the system components in relation to the intended design, a table of elevations comparing the installed elevations to the design elevations and a written, signed and stamped certification by the designer that the system has been installed as per his/her design and within standard and customary engineering tolerances. 4. At the discretion of the inspector, after the system has been covered and final grading completed, the Engineer shall shoot final grades and verify on the as-built plan, the depth of cover over the system components (see Attachment A for as-built guidelines).

If fill or stone is placed before the first or second inspections, the inspector may require its removal as necessary to complete the inspection. If final grading over any system component is done prior to inspection, the material shall be removed in order that the requisite inspection can be carried out. The cost of removal will not be borne by the Board of Health or its agent

Inspections are to be scheduled (usually for Wednesdays) by contacting the Board of Health Office.

The Board of Health will not waive any required inspections. In the event that severe weather is imminent, such as freezing temperatures, snow or rain, the installer shall contact the Board to arrange a non-scheduled inspection so that the system can be backfilled before being negatively impacted by weather conditions.

15.024: Violations of 310 CMR 15.000 and Carlisle Supplementary Sewage Disposal Regulations

Any licensed installer found to be in violation of either 310 CMR 15.00 or the Town of Carlisle Supplementary Sewage Disposal Regulations shall be subject to the following and shall have the right to a hearing before the Board:

  1. First violation – a written warning.
  2. Second violation within a twelve month period – for the following calendar year, and upon successful completion of the annual installer’s examination, the Board will issue a license limited to the six month period from July 1 through December 31 prior to which no installation work or Board of Health related activities can be conducted.
  3. Subsequent violations – within the same twelve-month period the penalty will be determined by the Board of Health.
  4. 15.027 Septic System Additives

    Only approved Title 5 additives may be used and only with prior approval from the Board of Health.

    15.030 Records

    All percolation and deep observation hole test results (presented on DEP approved forms) and a test location plan (TLP) shall be prepared and submitted to the Board of Health within 60 days of the test date.

    The TLP shall include the following criteria:

    1. Title block including owner’s name, address and phone, date, engineering consultant, name of soil evaluator, lot number and book and page.

    2. Lot lines, pertinent or outstanding site features (ledge outcrop, stone walls existing buildings etc.), north arrow, adjacent street names. Test locations shall be shown with taped distances from such features.

    3. Scale drawings are not necessary, however sufficient information and dimensioning shall be shown so that tests can, if necessary, be located in the field. Two copies are required.

    A TLP is not required if a septic plan, showing all testing, is submitted to the Board for approval within 60 days.

    SUBPART B: SITING OF SYSTEMS

    15.100 General Provisions

    An agent of the Board of Health will perform the witnessing of deep observation holes (high water tests) and percolation tests. Witnessing of tests will be scheduled (usually on Wednesdays) upon advance application and payment of the required fee to the Board. The owner of the lot, or owner’s agent, is responsible for the payment of the fee. Fees for the witnessing of high water tests and percolation tests will be established from time to time by the Board of Health.

    The spring high ground water season will be announced annually by the Board of Health.

    Sewage disposal systems shall be located on the same lot as the dwelling to be served.

    It shall be the responsibility of the design engineer to notify and receive approval from the Conservation Commission prior to gaining access to sites through environmentally sensitive areas. If it is found that access has been gained and testing performed without this approval, this testing shall become void.

    For repairs submittal shall include a sketch of the house floor plan showing all rooms which meet the definition of a bedroom.

    15.102 Deep Observation Holes

    New Installations

    Three (3) deep hole tests shall be required; two (2) reasonably spaced in the primary leaching area and one (1) in the reserve leaching area. Additional testing may be required at the discretion of the inspector.

    The following two high groundwater testing procedures shall be used to determine the design groundwater elevation at the site:

    1. Observe actual groundwater elevation during spring high groundwater season as set by the Board of Health. Adjust the observed groundwater reading by adding the groundwater offset for the date of testing. The offset correction will be determined by the Board of Health using Carlisle wells as index wells, or if necessary historical USGS well data from adjacent towns. If no groundwater is observed in the deep holes, assume groundwater is at the bottom of the hole and adjust using the groundwater offset. The Board shall use engineering judgment in applying all, a portion, or none of the required offset correction. This will be based on the individual site topography and deep observation hole data.

    2. Determine the high groundwater level using soil mottling as outlined in the 1995 Title 5.

    The design high groundwater level shall be the higher of the two results previously determined (most restrictive condition).

    Justification: The error that can occur in calculating a groundwater correction is reduced significantly when the calculation is based on high groundwater readings as opposed to readings taken during drier periods of the year. Therefore, deep observation holes for all new construction shall be dug, observed and witnessed during high groundwater season. In order to promote conservative engineering, the higher of the two groundwater levels as determined by observation and offset or mottling shall be used as the basis of the design. All groundwater correction calculations are the responsibility of the Board's engineering consultant.

     

    Repairs

    Two (2) deep holes test shall be required, reasonably spaced in the repair leaching area. Additional testing may be required at the discretion of the inspector.

    If testing must be done out of spring high groundwater season, soil mottling, if observed, will be used to determine groundwater elevation. If no soil mottling is observed, adjust the observed groundwater reading by adding the groundwater offset for the date of testing. If no groundwater is observed in the deep holes, assume groundwater is at the bottom of the hole and adjust using the groundwater offset. The Board shall use engineering judgment in applying all, a portion of, or none of the required offset correction. This will be based on the individual site topography and deep observation hole data. If testing is done during high water season, follow Carlisle Supplemental Regulations paragraph 15.102 - New Installations.

    15.104 Percolation Tests

    New Installations

    Two (2) percolation tests shall be done; one in the primary and one in the reserve area. If testing rates are not consistent additional testing may be required at the discretion of the approving authority.

    Repairs

    One (1) percolation test shall be done in the repair leaching area. Additional testing may be required at the discretion of the approving authority.

    It is required that all previous testing within fifty (50) feet of the field area be shown on a plan submitted for approval.

    No test shall be discontinued if it is within thirty (30) feet of the field area. The slowest rate obtained within 30 feet of a leaching facility design location shall be utilized as the design application rate.

    Acceptance of percolation tests done at a different time than the deep hole test, or in a different area is not automatic. When percolation tests are done at a time other than the high water tests, an additional deep hole test may be required at the discretion of the approving authority and shall be dug to a depth of four (4) feet below the elevation of the proposed percolation test to verify the soil consistency. Percolation tests shall be conducted no more than twenty (20) feet or less than ten (10) feet from its accompanying deep observation hole.

     

     

    SUBPART C: DESIGN, CONSTRUCTION, REPAIR AND REPLACEMENT OF ON-SITE SEWAGE DISPOSAL SYSTEMS

    15.211 Distances

    The required separation between a soil absorption system, septic tank, or pump chamber and Bordering Vegetated Wetlands, watercourse or well is one hundred (100) feet.

    15.221 General Construction Requirements for All System Components

    A minimum of twelve (12) inches of soil shall cover the septic tank, dosing chamber, and pump chamber.

    Every new leaching facility constructed in Carlisle shall meet the Title 5 requirement for the installation of garbage grinders whether or not a garbage grinder is proposed. However, since Title 5 limits new construction to a maximum of 440 gallons per day per acre, all new construction on one (1) acre parcels or less which proposes the maximum effluent loading (440 gpd), shall require a garbage grinder deed restriction in lieu of the garbage grinder requirement. Repairs to systems on parcels of this size will require the 50% increase in leaching area where feasible. For all other new construction the effluent loading rate shall not exceed the 440 gpd per acre including the garbage grinder allowance unless the aggregate area meets the criteria as stated in 15.216.

    15.228 Access Manholes

    At least one (1) 24 inch diameter access manhole to the septic tank and one (1) 24 inch diameter access manhole to the pump chamber shall be brought to within six inches of the finish grade and provided with a medium duty cast iron frame and cover, except under pavement where covers shall be brought to finished grade. Manholes brought to finished grade shall be secured to prevent unauthorized access.

    15.251 Leaching Trenches

    Specifications - There shall be at least three (3) trenches

    Stone - The stone shall extend not less than twelve (12) inches deep beneath the bottom of the distribution pipe.

    15.252 Beds or Fields

    Specifications - The minimum number of lines per field shall be three (3).

    Stone - The stone shall extend not less than twelve (12) inches deep beneath the bottom of the distribution pipes.

     

    15.290-15.293 Shared Systems and Condominiums

    1. The Board of Health will set the amount of the application fee for such systems from time to time.

    2. An insurance policy, bond, or other financial instrument must be provided to guarantee long term operation and maintenance of the system and shall have a face value not less than the current replacement cost of the system as determined by a professional engineer, registered sanitarian or licensed installer and shall be submitted annually along with the annual sewage disposal system report to the Board of Health. (See 9D)

    3. The land in which the system is located shall be permanently set aside by deed as commonly owned land. The deed shall accurately locate the boundaries of the septic system, including the septic tank(s), distribution box(s), and leaching field(s). The deed shall permanently prohibit construction of any building or structure above or below ground, grazing of any livestock above the field or tank, planting of any vegetation above the system other than grass or Board approved vegetation, use of the site for disposal of rubbish or other debris, and shall in general prohibit any use above or below the system not specifically approved by the Board of Health. These same prohibitions shall apply to the designated reserve area.

    4. Maximum flow shall be limited to 5,000 gallons per day. Design flow for the septic system shall be based on 165 gallons per day per bedroom.

    5. Garbage grinders are prohibited in all housing units sharing any septic system components and a deed restriction shall be recorded on the master deed.

    6. Septic systems shall be pumped annually. (See 10A)

    7. A cumulative water meter shall be installed in each dwelling unit and read once a year and a report filed with the Board of Health. (See 10E)

    9. An authorized representative shall be appointed by the Homeowner's Association to be the liaison with the Board of Health and in the event of an identified septic system failure shall be authorized to proceed with the necessary repairs.

    10. The Association representative shall submit the annual sewage disposal system report to the Board of Health which report shall include:

    a. report of annual pumping

    b. certified inspection report (extent of inspection to be determined by the Board)

    c. updated replacement cost of the system

    d. copy of current replacement provision policy, bond or other financial instrument

    e. annual water usage per dwelling unit.

     

     

     

    ADDITIONAL TOWN REGULATIONS

    1. Interceptor Drains

    Interceptor drains (curtain drains) may be employed to route the flow of groundwater away from a proposed septic system. Such interceptor systems shall be gravity flow only. No pumped interceptor system may be relied upon to protect a sewage disposal system. Interceptor outfalls shall be confined to the particular lot and shall not affect adjoining lots. In a case where the percolation rate is slower than twenty (20) minutes per inch the design engineer shall provide calculations demonstrating the adequacy of the interceptor drain. In Class I soils (sands), such calculations are not required.

    Connection of interceptor drains into town catch basins or manholes will be permitted subject to the approval of the Board of Selectmen in each case. The Selectmen will require, as a minimum, a notarized statement from the owner to be recorded with the deed stating that the Town will be held harmless in the event of system failure.

     

    2. Accessory Apartments:

    In order to determine whether adequate disposal of sewage, waste and drainage has been provided, the Board of Health requires the following:

    1. Application Form.

    2. Fee as determined by the Board.

    3. Pumper's Report on the condition, size and location of the present system and tank, within six (6) months of the date of application.

    4. Three (3) copies of a Preliminary Plan for a Proposed Sewage Disposal Reserve Area to be implemented if the present system fails. The Preliminary Plan must be designed by a registered professional engineer or other authorized person and include the following:

    a. Lot location (Street Address, Assessor's Map and Lot).

    b. Location and dimensions of the system.

    c. Design calculations for the total number of bedrooms in the house plus the apartment times 150% increase for garbage grinder.

    d. One (1) percolation test in the reserve area.

    e. Two deep observation holes (spring high water test) in the reserve area.

    f. Wetland boundaries and well location within 100 feet of the system.

    g. Contour map at ten (10) foot intervals.

    In lieu of the Preliminary Plan, the Board will accept a valid Sewage Disposal System Plan showing the recalculations for the increase or decrease in the system, which is certified for its adequacy by a registered professional engineer or other authorized person.

    If all of the above requirements have been met, the Board will issue a letter of approval for the accessory apartment to the Planning Board.

    It should be noted that the Board will not waive the garbage grinder requirement under its Supplementary Regulations in occupancies that include accessory apartments.

    3. Failure of a Septic System

    System Failure: If the Board of Health is advised of a failure, the Board may require its consultant to visit the site at the owner's expense. Repairs shall be carried out in the same manner as new construction, except for determination of high groundwater. If an existing design plan shows a suitable reserve area with adequate testing, this area can be used as the new primary leaching area. If no plan exists, two deep holes and one percolation test are required for the new primary area. All other design plan preparation requirements apply.

    Procedure for Repair: Minor Repairs require the following: Distribution Box Replacement - notification to the Board to arrange for an inspection by the Board’s agent prior to covering. Inspection will include observed location and water test to determine equal flow distribution to the lines. Septic Tank Replacement - notification to the Board when tank is positioned but before it is covered. Engineered as-built showing tank location and invert elevations. Approval of as-built and inspection by the Board’s agent prior to backfilling and final grading. Fees for the above will be set from time to time by the Board.

    The Board allows minor adjustments to a system following a Title 5 Inspection such as replacing covers, bringing manhole covers to within 6" of grade, non-chemical cleaning of lines, replacing broken straight line pipes less than 20’ in length either from the house to the septic tank or tank to the distribution box. If the installer is uncertain he must check with the Board.

  5. Replacement of System in Anticipation of Failure

Owners who are concerned about a potential failure may install a new system with the same daily flow rate of the existing system before it fails. The design of the new system must include spring high groundwater testing. All other procedures for the design and installation of the system can be in accordance with the regulations for the repair of a septic system.

5. Restricted Uses Within the Soil Absorption System

Any structure, activity or vegetation which might detrimentally impact the area of and immediately adjacent to the soil absorption system (such as grazing of livestock, constructing buildings, storing materials) is prohibited. Planting of any vegetation other than grass or Board approved vegetation is prohibited.

6. Timetable for Installing Septic Systems

Installations must be completed within ninety (90) days from excavation to final grading and final inspection. Extensions may be granted at the discretion of the Board of Health or its agent.

Installation of septic systems is prohibited during the months of December, January and February. Any system already in progress prior to December 1 shall have all work including all inspections, final grading, loaming and seeding completed prior to the winter cut off date of November 30. If circumstances such as freezing temperatures do not permit the application of loam and seed, the installer shall stabilize all sloped areas susceptible to soil erosion using either hay, anchored filter fabric or jute mesh.

7. Construction Site Toilet Facilities

Construction sites in operation over thirty (30) days shall provide toilet facilities for workers either in the existing residence or by use of commercially available portable chemical toilets.

8. Building Permit Applications

Building Permit applications that require review by the Board of Health must submit a current pumper’s report (performed within one year prior to the request). If there is a question regarding the condition of the tank or system, the Board shall require a full Title 5 Inspection of the system within 30 days of the receipt of the report. If a full inspection cannot be done due to weather conditions, the applicant has 90 days to complete the inspection and submit the report. For an addition which will result in an increase in flow to the system a Title 5 Inspection is required even if the system has the required capacity or a valid certificate of compliance. A Title 5 Inspection shall be considered valid if done within two years of the date of application to the Board unless otherwise determined by the Board.

No building permit shall be issued for an accessory building or structure having a permanent foundation, or other semi-permanent facility such as tennis court or swimming pool, until the applicant presents a plan showing a reserve area with adequate testing (one deep hole and one percolation test).

15.401 Waivers and Variances

Any request for a waiver from these Supplementary Regulations, a Title 5 variance, or a waiver under the Local Upgrade Approval, shall be submitted to the Board of Health in a separate cover letter which shall accompany the plans for the proposed system. In addition all variances and waivers must be listed on the plan. The request shall clearly state the variances or waivers sought and the reasons. Past practices are not necessarily adequate reasons for granting variances or waivers.

No waiver shall be granted except after the applicant has notified all required abutters by certified mail at the applicant’s own expense or by hand with proof of receipt at least ten (10) days before the Board of Health meeting at which the waiver request will be on the agenda. The notification shall state the specific waiver sought and the reasons therefore.

SEVERABILITY: So far as the Board of Health may provide, each section of these supplemental regulations shall be construed as separate to the end that if any section, item, sentence, clause or phrase shall be held invalid for any reason, the remainder of these rules and regulations shall continue in full force and effect.

Adopted December 1, 1983

Amended October 20, 1987 (Additional design requirements)

Effective December 1, 1987

Amended December 13, 1989 (Accessory apartment)

Effective January 15, 1990

Amended November 30, 1993 (Engineered As-Builts, Installations)

Effective January 1, 1994

Amended February 28, 1995 (1995 Title 5)

Effective March 31, 1995

Amended March 14, 1995 (Plan note 3)

Effective April 8, 1995

Amended July 23, 1996 (As-Built, Testing, Reserve Areas, Shared Systems)

Effective September 15, 1996

Amended May 26, 1998 (Barriers, Anticipating Failures, Violations, Testing for Repairs)

Effective July 1, 1998

Board of Health

Town of Carlisle

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Steven Opolski, Chair

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Thomas F. Saunders

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James M. Slattery

 

 

ATTCHMENT A

SURVEY AS-BUILT REQUIREMENTS

FOR SEWAGE DISPOSAL SYSTEMS

(GUIDELINES)

ELEVATIONS AND STADIA LOCATION

  1. Invert out of foundation
  2. Invert in septic tank
  3. Invert out of septic tank
  4. Invert in D-box
  5. Invert out of D-Box. All pipes must be level for 2 feet minimum.
  6. Invert in pit or
  7. Invert high end of all leaching lines
  8. Invert of bends and changes in direction
  9. Invert in and out of pump chamber, grease trap
  10. Measure spacing between float switches
  11. Bottom of leaching area (s)
  12. A minimum of five (5) spot grades shall be taken over the leaching area; one (1) in each corner and one (1) in the middle. Two (2) spot grades each (at either end) shall be taken over the septic tank and pump chamber, and one (1) over the d-box to determine the dept of final grades. The engineer shall state on the as-built whether or not topsoil has been added to the rough final grade and whether excessive or insufficient amounts of cover have been placed, in conformance with310 CMR 15.221(7).

STADIA LOCATION

a) Corners of foundation nearest to system

b) TBM’s

c) Well

TAPING

a) Tank manhole to foundation corners

b) Outside dimensions of leaching area

c) Pipe lengths

d) Foundation to septic tank and pump chamber (if approaching minimum offset).

e) System to well if close to minimum.

f) Edge of leaching area to nearest property line (if approaching minimum offset).

 

MISCELLANEOUS

a) Verify depth of stone under leaching lines

b) Repairs: If a driveway has been rerouted over any system component, or if the proposed

repair called for any system component to be located under the existing driveway, the new

driveway, or existing driveway location shall be located during the final grade as-built and shown on the as-built plan. New Construction: If the new driveway is not constructed in the proposed location and is constructed over any system component, or if the proposed plan called for any system component to be located under the proposed driveway, the driveway location shall be located during the final grade as-built and shown on the as-built plan.

PIPE SLOPES

a) Foundation to tank: 0.01 Minimum

b) Tank to D-box: 0.005 min. If greater than 0.08 check for Inlet Tee

c) Leaching lines: 0.005

PLAN PRESENTATION

  1. The as-built layout of the installed system shall be drawn over the design original so that any variation from the original intent is evident.
  2. An "As-Built Table of Elevations" shall be shown on the as-built drawing which compares the design elevations with the as-built elevations, and which shows any difference between the two.
  3. Items 2 and 3 shall be shown in plan while all other items can be included in the as- built table of elevations.
  4. Two copies of the as-built drawing, stamped, signed and dated by a registered engineer with the engineer’s certification (typically a paragraph stating that the system has been installed in conformance with all state and local codes and within allowable tolerances) shall be submitted to the Board of Health.