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jeopardizing the integrity of the Unit's foundation or the structures which control leachate, surface drainage,erosion, <br /> or gas. <br /> (6) [Reserved.] <br /> (7) Fault Identification&Proximity—Dischargers who own or operate new Class II Units [including <br /> expansions(of new or existing Units)built after November 27, 19841 shall identify any known Holocene fault within <br /> 200 feet of the facility(including any portions of such a fault underlying the Unit)in accordance with a procedure <br /> approved by the RWQCB. Dischargers who own or operate new Class III landfills [including expansions(of new or <br /> existing)landfills]shall identify any known Holocene fault underlying the landfill according to a procedure approved <br /> by the RWQCB.After July 18, 1997,dischargers required to submit a slope stability report,under&(f)(5),shall <br /> provide a review of historical seismicity within a 100 km(62 mile)radius of the facility,including the name of the <br /> fault,type of faulting,activity on the fault,design event for the fault(for Class II Units,the fault's MCE, for Class <br /> IH Units,the fault's MPE), distance from the facility,the expected ground motions(horizontal and vertical)at the <br /> facility resulting from the fault's design event,the expected duration of strong motion at the site resulting from the <br /> fault's design event, and an estimation of the cumulative duration of strong motion from aftershocks. <br /> (g) Hydrogeology. <br /> (1) General—An evaluation of the water bearing characteristics of the natural geologic materials identified <br /> under&(f)(2)including determination of hydraulic conductivity, delineation of all ground water zones and basic data <br /> used to determine the above. <br /> (2) Hydraulic Conductivity—An evaluation of the in-place hydraulic conductivity of soils immediately <br /> underlying the Unit. This evaluation shall include: <br /> (A) hydraulic conductivity data,in tabular form,for selected locations within the perimeter of the Unit; <br /> (B) a map of the unit showing test locations where these hydraulic conductivity data were obtained;and <br /> (C) an evaluation of the test procedures and rationale used to obtain these hydraulic conductivity data. <br /> (3) Flow Direction(s)—An evaluation of the perennial direction(s)of ground water movement within the <br /> uppermost ground water zone(s)within one mile of the waste management facility's perimeter. <br /> (4) Capillary Rise—Estimates of the height to which water rises due to capillary forces above the uppermost <br /> ground water zone(s)beneath and within one mile 9f the waste management facility perimeter.These estimates shall <br /> include an evaluation of the methods and rationale used in their development. <br /> (5) Springs—A map showing the location of all springs within the waste management facility and within one <br /> mile of its perimeter. The map shall be accompanied by tabular data indicating the flow and the mineral quality of <br /> the water from each spring. <br /> (6) Water Quality—An evaluation, supported by water quality analyses,of the quality of water known to exist <br /> under or within one mile of the waste management facility's perimeter, including all data necessary to establish the <br /> water quality protection standard(Water Standard)for the Unit,under 420390. <br /> (7) Background—A tabulation of background water quality for all applicable Monitoring Parameters and <br /> indicator parameters identified for each applicable monitoring program under 4420420-20435 and for all Constituent <br /> of Concern(COCs)identified under 420395. <br /> (A) Background water quality for an indicator parameter,Monitoring Parameter or COC in ground water shall <br /> be based on data from quarterly sampling of wells upgradient from the Unit for one year.These analyses shall: <br /> 1. account for measurement errors in sampling and analysis; and <br /> 2. account for seasonal fluctuations in background water quality, if such fluctuations are expected to affect the <br /> concentration of the waste constituent. <br /> (B) In case an evaluation monitoring program is initiated prior to fulfilling the requirements of&(g)(7)(A),the <br /> discharger shall,where feasible,establish background water quality based on a combination of all background data <br /> then available — including(1)all background data so far taken to satisfy&(g)(7)(A),(2)all background data <br />