Laserfiche WebLink
Corrective Action Plan Page <br /> 2 Analyses for total Lead will be discontinued if no detectable concentration is present in four consecutive <br /> samples <br /> 3 After an initial test immediately following the start of groundwater pumping, the maximum frequency <br /> of bioassay testing will be once per month and, after three additional, consecutive assays, the frequency of <br /> testing the will then be reduced first to quarterly and after four successive quarterly sampling rounds to a <br /> twice-yearly schedule,unless the results of any assay produce abnormally low survival rates, in which case <br /> a monthly testing schedule will be re-iiutiated until three successive tests produce normal survival rates <br /> 1 Monitoring of Treatment System Parameters <br /> To monitor the performance of the groundwater treatment system and provide a data base <br /> that can be used to maintain optimal performance of the equipment, a log of equipment <br /> operating parameters, flow-rates and pressure and temperature gauge readings will be <br /> maintained and water samples will be periodically recovered from the following points (in <br /> addition to the system discharge to the storm-water sewer) the water influent line to the <br /> air stripper, the water effluent line from the air stripper (i a the influent line to the carbon <br /> treatment units) and the mid-point between the pair of carbon treatment units (See Figure <br /> 11 for sampling-port locations ) <br /> These water samples will be recovered on the same schedule (t a once per week for four <br /> consecutive weeks after groundwater pumping is started and monthly thereafter) and <br /> managed in the same manner as the previously-described samples of the treated-water <br /> discharge They will be analyzed for the following suite of analytes <br /> Analyte Method of Analysis <br /> Total Petroleum Hydrocarbons EPA Method 5030/8015M <br /> (as Gasoline) <br /> Benzene EPA Method 602 <br /> Toluene EPA Method 602 <br /> Ethyl Benzene EPA Method 602 <br /> Total Xylenes EPA Method 602 <br /> Lead (Total) 1,2 EPA Method 239 2 <br /> Notes <br /> 1 In sample from influent to air stripper only <br /> 2 Analyses for total lead will be discontinued if no detectable concentration is present in four consecutive <br /> samples <br />