SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

MONITORING AND REPORTING PROGRAM NO. 5-01-119 (REVISED) -2- STOCKTON COGEN COMPANY SAN JOAQUIN COUNTY (1) The Discharger must submit a report within 60 days of permit adoption outlining EPA test methods and detection limits for approval,with a goal to achieve detection levels below applicable water quality criteria. At a minimum the Discharger shall comply with the Monitoring Requirements for these constituents as outlined in Section 2.3 and 2.4 of the Policy for Implementation of Toxics Standards for Inland Surface Waters,Enclosed Bays,and Estuaries of California, adopted 2 March 2000 by the State Water Resources Control Board(with the exception of molybdenum). Report all peaks identified by the EPA test methods. (2) In lieu of sampling for priority pollutants other than metals,the Discharger may certify, on an annual basis,that no priority pollutants are present in the discharge. (3) Priority Pollutant Metals will at a minimum include the analyses of the following total metals: arsenic,barium, cadmium, chromium, copper,lead,mercury,molybdenum,nickel,silver,and zinc. (4) Concurrent with metals analyses. 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, 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. INTERNAL WASTE SOURCES Low volume waste sources include those sources defined under 40 CFR Part 423.11 and include discharges from plant equipment drains and the ion exchange water treatment system for this facility. Low volume waste source samples shall be collected downstream from the last connection through which low volume wastes can be admitted into the outfall prior to commingling with other waste streams. Low volume waste samples shall be representative of the volume and quality of the low volume waste discharge. Time of sample collection shall be recorded. Monitoring shall include at least the following: Station Description IWS-1 Cooling tower blowdown(before mixing with RIO concentrate) IWS-2 Internal low volume waste sump discharge IWS-3 RO concentrate (sampled prior to mixing with cooling tower blowdown) Sampling Constituents Units Station Frequency IWS-1, Priority Pollutants' µg/1 IWS-1 Annual IWS-1, Chromium (total) mg/l IWS-1 Quarterly IWS-1, Zinc (total) mg/l IWS-1 Quarterly IWS-1, Free chlorine mg/l IWS-1 Monthly IWS-2 & 3, Suspended Solids mg/1 IWS-2 & 3 Monthly IWS-2 & 3, Oil & Grease mg/l IWS-2 & 3 Monthly Footnote on next page.