ARCHIVED REPORTS XR0009904 - Laserfiche WebLink

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Corrective Action Plan Page 29 Lead < 5 µg/Liter 50 µg/Liter e Note 1 The sum of the concentrations of benzene ethyl benzene, toluene and xylenes in any single sample shall not exceed 5 µg/Liter The pH of the discharge is limited to not less than 6 5 nor greater than 8 5 and it shall not be acutely toxic as defined by less than 90% survival of standard test organisms 50% of the time, and less than 70% survival 10% of the time in 96-hour, static or continuous- flow, bioassay tests in undiluted samples of the effluent Note If the proposed discharge is permitted by the CRWQCB under an alternate permit procedure to NPDES No CA0082929, the quality of the water discharged will comply with the requirements of the alternate permit procedure, but it is expected that such requirements would be the same as, or less stringent than, those specified herein Eluent Monitoring The quality of the water discharged from the groundwater treatment system will be monitored to check for compliance with the requirements of NPDES Permit No CA0082929, or such other permit as will be issued by the CRWQCB Samples for this purpose will be taken during treatment of the first charge of water pumped from the remedial excavation into the treatment system and once per week thereafter while the treatment system is in operation The cumulative total of effluent discharged from the treatment system will be recorded daily Samples of the discharge will be drawn from the sampling port (V SP-1) installed in the piping downstream of the activated carbon treatment units (i a immediately upstream of the point of discharge of the treated water to the storm sewer - see Figure 10 for sampling port location) The sample water will be directed into clean glass vials supplied by the laboratory via a tube connected to the sampling port so as to completely fill the vials The sample vials will then be tightly closed, labeled for identification, entered into chain-of- custody control and packed on chemical ice for transport to the laboratory within 24 hours These samples will be analyzed as follow p y s Analyte Method of Analysis pH EPA Method 150 1 Specific Conductivity EPA Method 120 1 Total Petroleum Hydrocarbons EPA Method 5030/8015M (as Gasoline)