SITE INFORMATION AND CORRESPONDENCE 2000-2018

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MONITORING AND REPWING PROGRAM NO. 5-00-031 3 CITY OF LODI WHITE SLOUGH WATER POLLUTION CONTROL FACILITY SAN JOAQUIN COUNTY Sampling Constituent Units Type of Sample Frequency Mercury? 9g/1 24 hr Composite2 Monthly Zinc µg/1 24 hr CompositeZ Monthly Priority Pollutants$'9 µg/l see footnote 8 Quarterly Diazinon$'9 µg/1 24 hr Composite Quarterly Chlorpyrifos$'9 µg/I 24 hr Composite Quarterly Total Organic Carbon µg/l 24 hr Composite2 Quarterly Standard Minerals 10 mg/l 24 hr Composite Annually 1 Turbidity sampling requirement will become effective with completion of additional disinfection facility 1 May 2004. 2 The samples shall be flow proportional composite samples. 3 Samples shall be collected daily whether discharges are to Dredger Cut or to land reclamation. 4 Samples shall be grab samples until 1 February 2002. Effective 1 February 2002,continuous monitoring shall be implemented. 5 The acute bioassays samples shall be analyzed using EPA/600/4-90/027F,Fourth Edition,or later amendment with Board staff approval. Temperature and pH shall be recorded at the time of bioassay sample collection. Test species shall be fathead minnows (Pimephales promelas),with no pH adjustment unless approved by the Executive Officer. 6 Concurrent with Ammonia Sampling. 7 Requires use of"clean technique"(EPA Method 163 1)for sampling,handling and analysis. 8 Discharger must submit report outlining sample collection,EPA test methods and detection limits within 60 days of permit adoption for approval. Report all peaks identified by the EPA test methods. 9 To be collected concurrently with receiving water quarterly monitoring. 10 Standard Minerals include calcium,magnesium,hardness,sodium,potassium,alkalinity,sulfate, chloride,boron,and nitrate. If the discharge is intermittent rather than continuous, then on the first day of each such- intermittent discharge, the Discharger shall monitor and record data for all of the constituents listed above with the exception of metals and priority pollutants, after which the frequencies of analysis given in the schedule shall apply for the duration of each such intermittent discharge. In no event shall the Discharger be required to monitor and record data more often than twice the frequencies listed in the schedule. EFFLUENT MONITORING OF INDUSTRIAL/DOMESTIC RECLAMATION WATER Monitoring shall commence during the irrigation season. Effluent samples shall be collected downstream from the last connection through with reclaimed water and sludge can be admitted into the field distribution system. Effluent samples shall be representative of the volume and nature of the discharge. Time of collection of grab samples shall be recorded. The field(s) being irrigated and amount of flow shall be identified.