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Prior to CA Regional Board staff approval of a Pilot Study Work Plan, a bench-scale
<br /> ' laboratory study(study) will be required to evaluate the effects of injecting ozone into the
<br /> aquifer, specifically identifying all anticipated interactions, including valence changes for
<br /> metallic ions (i e , oxidizing naturally occumng Cr3{to toxic C? ) The study must also
<br /> ' include
<br /> 1) Stoichiometry or chemical equations with concentrations in moles for the reaction
<br /> between the soil and groundwater and the injected ozone
<br /> 2) Provide results of a leachability testing of native soils, to determine the potential effects
<br /> from the ozone injection General minerals analyses should be conducted to evaluate if
<br /> ' naturally occumng minerals will move into solution as a result of the ozone injection
<br /> The following general mineral suite should be evaluated aluminum, antimony, arsenic,
<br /> barium, beryllium, cadmium, calcium,chromium (III and IV), cobalt, copper, iron, lead,
<br /> ' magnesium, manganese, mercury, molybdenum, nickel,potassium, selenium, silver,
<br /> sodium, thallium,tungsten, vanadium, and zinc
<br /> 3) Provide results of general minerals analyses of the groundwater Results from this
<br /> ' analysis should be used to evaluate if naturally occumng minerals will precipitate out of
<br /> the groundwater as a result of the ozone injection The following general mineral suite
<br /> should be evaluated aluminum, antimony, arsenic,barium,beryllium, cadmium, calcium,
<br /> ' chromium (III and IV),cobalt, copper, iron, lead, magnesium, manganese, mercury,
<br /> molybdenum, nickel, potassium, selenium, silver, sodium, thallium, tungsten, vanadium,
<br /> and zinc
<br /> 4) Provide an estimate of the mass of other constituents/parameters, including electrical
<br /> conductivity, chlorides, sulfides, etc which will be released into the aquifer as a result of
<br /> the ozone injection, and the rationale for the estimate
<br /> ' 5) Provide an estimate of the mass of total dissolved solids that will be mobilized by the
<br /> injection of the ozone, and the rationale for the estimate
<br /> 6) Provide estimates of changes in pH in groundwater and the radius of influence for the
<br /> ' proposed ozone injection
<br /> 7) Provide an assessments of the site specific effectiveness of ozone sparging for
<br /> eliminating identified soil and groundwater contamination in this case, and
<br /> identify/demonstrate that any breakdown products of this process (i a acetone and/or
<br /> other degradation products) are analyzed for and addressed by the planned remediation
<br /> ' If the study indicates that the proposed ozone injection will remediate the hydrocarbons/fuel
<br /> additives and will not adversely affect water quality, we can determine the applicability of waste
<br /> ' discharge and appropriate filing fees
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