[Comment: As long as the applicant can document that a reasonable attempt was made to obtain the information, the application will be considered complete even if information is lacking, such as a lack of response to the written or oral survey.]
[Comment: Additional cross-sections may be submitted.]
[Comment: The narrative portion of the hydrogeologic and geotechnical report focuses on the siting and ground water monitoring issues. The subsurface investigation portion of the report also addresses stability and design issues.]
[Comment: Publicly available information regarding unstable areas is placed in a separate section located in the stability analysis in paragraph (C)(4) of this rule.]
[Comment: This information may also be used in the stability analysis specified in paragraph (C)(4) of this rule.]
[Comment: The narrative portion of the hydrogeologic and geotechnical report focuses on the siting and ground water monitoring issues. The subsurface investigation portion of the report also address stability and design issues.]
[Comment: The subsurface investigation conducted to provide the information in accordance with this paragraph may be combined with the subsurface investigation conducted to provide the information specified in paragraph (C)(3)(e)(v) of this rule.]
[Comment: Most field methods for measuring hydraulic conductivity primarily evaluate lateral hydraulic conductivity, but also account for at least some effects of vertical hydraulic conductivity over the tested interval. In cases where laboratory measurements of vertical hydraulic conductivity are obtained for unconsolidated saturated units which are wholly or partially saturated, the vertical hydraulic conductivity should be compared to the field hydraulic conductivity to help evaluate the extent to which nearvertical fractures may be contributing to ground water flow through the unit. Hydraulic conductivity data should be interpreted with respect to the primary and secondary porosity features that are observed or are reasonably expected to occur in the investigated units, as well as the stratigraphic and structural features of the investigated units.]
[Comment: Ohio EPA recommends a frequency of one subsurface investigatory site for every four acres on a more or less uniform grid across the site. However, for sites that are located in areas where landslides or mass movements of unconsolidated material have occurred, or are underlain by complex geology with multiple unconsolidated stratigraphic units, more borings may be necessary pursuant to paragraph (A)(1) of this rule. Sites that are located in areas with a consistent stratigraphy, which is supported by comprehensive and reliable information from previous studies, may use a lower frequency of borings. Ohio EPA recommends against boring through cap, existing waste, or liner to obtain this information. Other methods or increased borings around the landfill footprint should be used.]
[Comment: Given the objective of finding thin unconsolidated stratigraphic units susceptible to bearing capacity failure, static stability failure, seismic stability failure, or settlement, the unconsolidated stratigraphic units should be logged continuously, and the subsurface investigation may also need to go deeper if publicly available data gathered pursuant to paragraph (C)(4)(g) of this rule or if field data gathered pursuant to paragraph (C)(3)(d)(i) of this rule indicate that deeper susceptible units exist.]
[Comment: The subsurface investigation conducted to provide the information specified in this paragraph may be combined with the subsurface investigation conducted to provide the information specified in paragraph (C)(3)(e)(ii) of this rule.]
[Comment: "Phreatic surface" is synonymous with the term "water table" and "piezometric surface" is synonymous with the term "potentiometric surface." Hydrogeologic investigations generally use "water table" for a water level surface in an unconfined saturated unit and "potentiometric surface" for the pressure head surface associated with a confined saturated unit. In hydrogeologic applications, the "water table" is considered a special type of potentiometric surface where the head pressure is equal to atmospheric pressure.]
[Comment: Any piezometric surfaces associated with bedrock that may affect the facility during excavation or construction may also be identified.]
[Comment: Undisturbed samples from at least ten per cent of the borings passing through each susceptible unit or a minimum of three, whichever is greater, should be collected to provide representative data.]
[Comment: A change in equipment that decreases the capability of the owner or operator to handle the waste received, may be considered to endanger human health and may constitute the need for a permit.]
Replaces: 3745-27-70
Ohio Admin. Code 3745-580-701
Five Year Review (FYR) Dates: 06/30/2028
Promulgated Under: 119.03
Statutory Authority: 3734.02, 3734.72
Rule Amplifies: 3734.02, 3734.12, 3734.72, 3734.77, 3734.79, 3745.11
Prior Effective Dates: 03/01/1996, 08/15/2003, 07/01/2004