ࡱ> ^`]@ &bjbj.. (BDD  8  \ A~ ~  D F F F -s `&`3A$BRDWA WA lA   " D  D    r 0bm2 " 0 A0A E "E E   WAWA Chapter 376: SOIL TYPES STANDARD OF THE SITE LOCATION LAW SUMMARY: These regulations describe the scope of review of the Board in determining a developer's compliance with the " soil types" standard of the Site Location Law (38 M.R.S.A. 484(4)); the information which shall be submitted, when appropriate, within an application for approval; and, the terms and conditions which the Board may impose on the approval of an application to ensure compliance with the standard. 1. Soil Types Suitable For the Development A. Scope of Review. In determining whether the proposed development fill be located on soils suitable for the nature of the development, the Board shall consider all relevant evidence to that effect, such as evidence that: (1) All major limitations to the proposed development presented by soil characteristics will be overcome by proper engineering techniques. (2) The developer will comply with the "fb88 Guidelines For Septic Tank Sludge Disposal On Land'', the '''fb88 Guidelines For Manure and Manure Sludge Disposal On Land", and all other appropriate regulations and guidelines. (3) When a single family, residential development is proposed to be served by individual, on-lot subsurface sewage disposal systems and individual, on-lot wells, the lots will be at least the minimum area established in Table A according to the soil characteristics of each lot as determined by a licensed site evaluator. (a) Lots smaller than the minimum area specified in Table A may be allowed if a developer can present evidence that, because of unique characteristics of the site, or because of an innovative and acceptable method of on-lot sewage disposal, the minimum lot size requirement should not apply. NOTE: The Board recognizes the advantage of clustered development and encourages the use of this approach to development design. The establishment of minimum lot sizes in subsection 3 is not intended to discourage the use of a clustered approach to development. B. Submissions. Applications for approval of proposed developments shall include evidence that affirmatively demonstrates that the development will be built on suitable soils, including information such as the following, when appropriate: (1) A map indicating soil types or general characteristics of the soils. Soil boundaries are to be observed throughout their length and air photos may be used to aid boundary delineations. The maximum size of any included dissimilar soils will be one-half acre. The soils are to be mapped at the same scale as the map showing the layout of the proposed development. The soils map should include such features as: lot lines; location of structures, roads, and other improvements; the location of natural buffer strips, easements, and dedicated open space; natural features; and, the location of test pits and/or borings. (a) A soils map of less detail may be acceptable if it is determined by the Staff that the level of detail required in subsection C(l), above, is not necessary to ensure a proper evaluation of the development proposal to ensure compliance with this standard. (2) When on-site sewage disposal is to be utilized, an organized compilation of all test pit and/or boring investigations, including but not limited to the following information: soil series or soil profile and condition; depth of pit or boring; depth to seasonal high water; depth to bedrock and/or other impervious strata; and, soil texture as related to soil profile. (3) A report identifying all major limitations to the proposed development presented by soil characteristics of the site and the techniques which will be used to overcome the limitations. The report will be prepared by a duly qualified person. C. Terms and Conditions. The Board may, as a term or condition of approval, establish any reasonable requirement to ensure that the development will be built on soil types which are suitable for the nature of the undertaking, such as requiring: (1) The combination of lots when the lots, as proposed, are not suitable for the nature of the development proposed. (2) The use of specific on-site, sewage disposal techniques in order to overcome soils limitations. (3) The establishment of a common sewage disposal system when on-lot disposal is determined to be undesirable. After public notice and public hearings held on June 14 and 15, 1979, the above regulations are hereby adopted this 8th day of August, 1979. AUTHORITY: 38 M.R.S.A. 343 EFFECTIVE DATE: November 1, 1979 EFFECTIVE DATE (ELECTRONIC CONVERSION): May 4, 1996 BASIS STATEMENT These regulations are intended to explain and clarify the meaning of the Soil Types Standard of the Site Location Law (38 M.R.S.A. 484(4)) and to set out the duties, power, responsibilities, and limitations of the Board and of applicants for approval of proposed developments under that standard. Table A Soil Conditions A. Bedrock B. Free of C. Generally encountered drainage mot- bright colors in at depths tling to the top 60 cm. (24'' SOIL PROFILES of 0 to depth of of the soil with 100 cm 100 cm (38") drainage mottling at (38") or greater depths 38-100 cm. (15"-39") sq. ft sq. ft. sq. ft. PROFILE 1 SILTY GLACIAL TILL SOILS Silt loam soilssq. ft.sq. ft.sq. ft. to a depth of 100 cm (39") or more, or until bedrock. These soils tend to become more compact with depth. Stones may be 40,000 25,000 33,000 present throughout the profile. May or may not have an impervious layer. Generally finer textured (silty) tills. PROFILE 2: LOAMY GLACIAL TILL SOILS Loam to sandy loam soils to a depth of 30,000 21,000 29,000 100 cm (39")or more, or until bedrock. Stones may be present throughout the profile. Glacial till PROFILE 3: LOAMY GLACIAL TILL SOILS WITH PAN - Loam to sandy loam soils to a depth of 100 cm (39") or more, or until bedrock. These soils become firm to very firm at depths 30,000 29,000 29,000 of 30-75 cm. (12" - 30") Stones may be present through the profile. This till is a firm basal or lodgement till. PROFILE 4: SANDY GLACIAL TILL SOILS Sandy loam to loamy sand soils to a depth of 100 cm (39") or more, or until 26,000 20,000 25,000 bedrock. Stones may be present throughout the profile. This till is a coarse textured ablation till. PROFILE 5: LOAMY OUTWASH SOILS Loam to sandy loam soils underlain by stratified sands and gravels at depths less than 100 cm. (39"). Stones or cobbles may be present 80,000 40,000 80,000 in thelower portion of the profile. Proglacial and ice-contact stratified drift - medium to fine sands. PROFILE 6: SANDY OUTWASH SOILS Loamy sands and gravelly sandy soils underlain by stratified sands and gravels at depths less than 100 cm. (39") Stones or cobbles 80,000 40,000 80,000 may be present throughout the profile. Proglacial and ice-contact stratified drift - coarse sand and gravels. PROFILE 7: SANDY MIXED ORIGIN SOILS Sandy loam to loamy sand soils underlain by very firm silts to silty clays at depths less 30,000 29,000 29,000 than 100 cm. (39") Stones are usually absent in the profile. Stratified drift over marine and lacustrine sediments. PROFILE 8: SANDY MIXED ORIGIN SOILS Silt loam to fine sandy soils underlain by dense 34,000 33,000 33,000 or firm stratified silts and lenses of very fine sands at depths less than 100 cm. (39") Stones are usually absent in the profile. Stratified deposits, primarily marine or lacustrine. PROFILE 9: SILTY MARINE SOILS Silt loam soils underlain by very firm silt loams to clays at depths less than 39,000 38,000 38,000 100 cm. (39"). Stones are usually absent in the profile. 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