of making incorrect decisions from the test by 6IrEI1

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									     Problem Statement                 Identify the Decision              Inputs to the Decision         Define Study Boundaries                    Decision Rule                   Tolerable Limits on Decision          Optimize the Sampling
                                                                                                                                                                                               Errors                              Design
 Give a concise description of   Identify principal study question,     Identify types and sources of         Specify the target                                                                                        Select the resource-effective
                                                                                                                                           Specify appropriate population             Specify the decision rule as a
 the problem that necessitates    consider alternative outcomes,       information needed to answer        population, determine                                                                                        sampling and analysis plan
                                                                                                                                           parameters for making estimates            statistical hypothesis test,
    the study and develop a        develop decision statements,          study questions, identify the      spatial and temporal                                                                                        that meets the performance
                                                                                                                                           and specify the statistical function       examine consequences of
    conceptual model of the        organize multiple decisions.       basis of information, and select    limits, identify practical                                                                                      or acceptance criteria.
                                                                                                                                           and the estimation procedure.              making incorrect decisions
  environmental hazard to be                                              appropriate sampling and       constraints, and define the
                                                                                                                                                                                      from the test, and place
          investigated.                                               analysis methods for generating        scale of inference.
                                                                                                                                                                                      acceptable limits on the
                                                                               the information.
                                                                                                                                                                                      likelihood of making
                                                                                                                                                                                      decision errors.
Downstream Risk
Releases of sediment, acid       Determine whether releases from       COCs released from               The study area will            If COC concentrations in surface           Sampling of biota and Tribal        Sampling will occur during
solutions, and metals from       the Leviathan Mine pose a              Leviathan Mine.                  include Leviathan and           water, Tribal resources, or biota from     resources will be performed         specific time ranges
Leviathan Mine may pose an       potential threat to human health      Identification of biota and      Bryant Creeks                   Bryant Creek are similar to or lower       opportunistically and               determined by the hydrology
unacceptable risk to biota,      and the environment outside of         Tribal resources to be           downstream from                 than COC concentrations in surface         professional judgment will be       of the watersheds for surface
humans and water quality in      acceptable limits and above            collected for laboratory         Leviathan Mine, East Fork       water, Tribal resources, or biota from     used to assess the suitability of   water and sediment
the Bryant Creek Watershed.      ambient levels requiring further       analysis.                        Carson River from River         reference streams (with 90% to             initial sampling results. As        sampling, and the life-cycle
                                 investigation and response action,    Information about the            Ranch to Ruenstroth Dam,        95 % confidence), then Bryant Creek        additional data are available       and traditional use patterns
                                 or recommend that no further           occurrence and life cycle of     and appropriate reaches of      risks are similar to reference stream      (for example n>10 from a sub        for biota and Tribal
                                 investigation is necessary.            biota and Tribal resources to    reference streams.              risks, or are within the acceptable risk   area), statistical analysis will    resources. Sampling will
                                                                        be collected for analysis.                                       range, and no action may be                be applied to assess                occur in discrete areas
                                                                       Information about the            The study duration will         acceptable.                                concentration data and the goal     identified within the study
                                                                        hydrology of Bryant Creek        extend from Fall 2009                                                      will be 90% to 95%                  area. Opportunistic
                                                                        and Reference Streams.           through Fall 2010 and          If COC concentrations in surface            confidence. Sampling of             collection of at least 10
                                                                       Reference stream reaches to      may extend to later time       water, Tribal resources, or biota from      surface water will be               samples of each material
                                                                        be sampled for comparison.       periods if additional          Bryant Creek are significantly greater      performed in accordance with        from each area (Bryant
                                                                       Surface water COC analytical     information is determined      than COC concentrations in surface          on-going surface water              Creek, reference stream
                                                                        data from the Bryant Creek       to be necessary based on       water, Tribal resources, or biota from      monitoring augmented                reaches) will be attempted
                                                                        watershed and reference          evaluation of initial          reference streams, then Bryant Creek        (locations, analytes, analytical    for biota and Tribal
                                                                        streams.                         samples.                       risks are higher than reference stream      methodology) as necessary to        resources. Additional
                                                                       Sediment COC analytical data                                    risks, and risks should be assessed.        achieve project objectives.         sampling will be performed
                                                                        from the Bryant Creek            Samples will be collected                                                  Sediment samples will be            as needed to support
                                                                        watershed and reference          to coincide with traditional  If risks from exposure to surface           collected in proximity to biota     requirements for risk
                                                                                                         uses of Tribal resources       water, Tribal resources, or biota from      and Tribal resource sampling        assessment.
                                                                        streams.
                                                                                                         (spring and fall), and with    Bryant Creek are outside of the             locations.
                                                                       Biota and Tribal Resources
                                                                                                         modern recreational uses       acceptable risk range, additional
                                                                        COC analytical data from the
                                                                                                         (spring, summer, fall).        investigations and response activities      Analytical data will be
                                                                        Bryant Creek watershed and
                                                                                                         Winter time exposures to       will be necessary.                          evaluated in accordance with
                                                                        reference streams.
                                                                                                         COCs from Leviathan                                                        PARCC parameters through
                                                                       Risk based concentrations of
                                                                                                         Mine for human and             If risks from exposure to surface           use of laboratory control
                                                                        concern for surface water,       ecological receptors are                                                   samples, calibration data, and
                                                                                                                                        water, Tribal resources, or biota from
                                                                        biota, and tribal resources.     assumed to be negligible.                                                  results of MS/MSD samples.
                                                                                                                                        Bryant Creek are within the
                                                                                                                                        acceptable risk range, additional           These evaluations will result in
                                                                                                                                        investigations and response activities      quantification of the reliability
                                                                                                                                        may not be necessary.                       of the analytical data. The
                                                                                                                                                                                    goal is to produce defined data
                                                                                                                                                                                    suitable for use in risk
                                                                                                                                                                                    assessment.
Acid Drainage Sources
     Problem Statement                  Identify the Decision              Inputs to the Decision         Define Study Boundaries                    Decision Rule                 Tolerable Limits on Decision          Optimize the Sampling
                                                                                                                                                                                              Errors                              Design
 Give a concise description of    Identify principal study question,     Identify types and sources of         Specify the target                                                                                      Select the resource-effective
                                                                                                                                            Specify appropriate population           Specify the decision rule as a
 the problem that necessitates     consider alternative outcomes,       information needed to answer        population, determine                                                                                      sampling and analysis plan
                                                                                                                                            parameters for making estimates          statistical hypothesis test,
    the study and develop a         develop decision statements,          study questions, identify the      spatial and temporal                                                                                      that meets the performance
                                                                                                                                            and specify the statistical function     examine consequences of
    conceptual model of the         organize multiple decisions.       basis of information, and select    limits, identify practical                                                                                    or acceptance criteria.
                                                                                                                                            and the estimation procedure.            making incorrect decisions
  environmental hazard to be                                               appropriate sampling and       constraints, and define the
                                                                                                                                                                                     from the test, and place
          investigated.                                                analysis methods for generating        scale of inference.
                                                                                                                                                                                     acceptable limits on the
                                                                                the information.
                                                                                                                                                                                     likelihood of making
                                                                                                                                                                                     decision errors.
Acid drainage from Leviathan      Determine if measures to reduce       Location (including area and     The study area includes          If the creation of acid drainage can   Physical and chemical data          Sampling of geological
Mine discharges from the site     or eliminate the quantity of acid      volume) of acid creating         areas disturbed by mining         be stopped or minimized the            will be collected to support        materials and groundwater
at multiple locations and         drainage created and discharged        material                         at Leviathan Mine. These          impacts to surface water would be      engineering design and risk         will proceed initially using
degrades surface water quality.   from the site would reduce surface    Sources of water contributing    areas include the current         reduced and the effort to intercept    assessment. Location of acid        professional judgment to
                                  water impacts, and reduce the          to acid creation                 locations of mine waste           and treat acid drainage could be       generating materials will be by     provide location information
                                  effort and resources needed to        Chemical characteristics of      and mining related                reduced                                remote geophysical techniques       suitable for supporting
                                  intercept and treat the acid           acid generating material         disturbances at the                                                      and field sampling. Modern          engineering design.
                                  drainage.                             Chemical characteristics of      surface, and the volume           If the creation of acid drainage       remote detection techniques         Evaluation of initial
                                                                         water contributing to acid       and extent of in-situ rock        cannot be stopped or minimized         are accurate to a few meters,       information will be used to
                                                                         creation                         that contributes water and        impacts to surface water would not     field sampling will be used to      design a sampling strategy to
                                                                        Physical processes               acid drainage from                be reduced without continued           confirm remote detection and        quantify physical and
                                                                         contributing to acid creation    underground.                      efforts to intercept and treat acid    will be accurate to within less     chemical parameters
                                                                        Chemical processes                                                 drainage.                              than one meter (vertically and      sufficiently to support risk
                                                                         contributing to acid creation    The study duration will                                                  horizontally).                      assessment.
                                                                                                          extend from Fall 2009
                                                                        Migration pathways from
                                                                         sources to discharge             through at least two                                                     The goal of analytical data will    Groundwater samples will
                                                                                                          complete hydrologic                                                      be 90% to 95% confidence in         be collected quarterly to
                                                                         locations.
                                                                                                          cycles and may extend to                                                 COC concentrations and              coincide with the hydrologic
                                                                        Physical transport processes
                                                                                                          later time periods if                                                    chemical properties.                cycle at the site, and as
                                                                         from acid sources to
                                                                                                          additional information is                                                                                    necessary based on review
                                                                         discharge locations.
                                                                                                          determined to be                                                         Analytical data will be             of new information as it is
                                                                        Chemical processes occurring
                                                                                                          necessary based on                                                       evaluated in accordance with        acquired.
                                                                         along the migration pathway
                                                                                                          evaluation of initial                                                    PARCC parameters through
                                                                         from acid sources to             information.                                                             use of laboratory control
                                                                         discharge locations.                                                                                      samples, calibration data, and
                                                                        Volume of acid drainage and                                                                               results of MS/MSD samples.
                                                                         associated COCs created and                                                                               These evaluations will result in
                                                                         discharged from each source.                                                                              quantification of the reliability
                                                                                                                                                                                   of the analytical data. The
                                                                                                                                                                                   goal is to produce defined data
                                                                                                                                                                                   suitable for use in risk
                                                                                                                                                                                   assessment, and engineering
                                                                                                                                                                                   design.

								
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