14.10.300 Baseline Monitoring Reports.
A. When categorical standards for an industry category are published (promulgated), users that perform that process and either currently discharge or are scheduled to discharge wastewater from the process to the POTW must submit a “baseline monitoring report” to the director. This report must contain the information listed in subsection C of this section. The report is due within 180 days after the effective date of a categorical pretreatment standard, unless the final administrative decision on a category determination comes later.
B. Users that wish to begin discharging wastewater to the POTW from operations subject to categorical pretreatment standards after EPA has published the standards (called new sources) shall submit a “baseline monitoring report” to the director containing the information listed in subsection C of this section. However, for new sources, the report must be provided at least 120 days before desiring to discharge. New sources shall describe the method of pretreatment they intend to use to meet applicable categorical pretreatment standards. Because monitoring data will not be available for proposed facilities, new sources instead must provide estimates of the anticipated flow rates and quantity of pollutants to be discharged.
C. The baseline monitoring report shall include the following information:
1. All information required in VMC 14.10.190(A)(1) through (A)(8).
2. Additional conditions for existing sources measuring pollutants.
a. Users shall take a minimum of one representative sample to compile the data for the baseline monitoring report.
b. Users shall take samples immediately downstream from pretreatment facilities if such exist or immediately downstream from the regulated process if no pretreatment exists. If the user mixes other wastewaters with the regulated wastewater prior to pretreatment, the user must provide the flows and concentrations necessary to apply the combined wastestream formula of VMC 14.10.060(C) and 40 CFR Part 403.6(e). Where the user wants an alternate concentration or mass limit, and it is allowed by federal rules at 40 CFR Part 403.6(e), the user shall propose the adjusted limit and provide supporting data to the control authority.
c. Sampling and analysis shall be performed in accordance with VMC 14.10.400 (sample collection), and VMC 14.10.390 (sample analysis).
d. The director may allow the report to use only historical data if the data is good enough to allow the evaluation of whether (and which) industrial pretreatment measures are needed.
e. The baseline monitoring report shall indicate the time, date, and place of sampling, methods of analysis. The user shall certify that the sampling and analysis presented is representative of normal work cycles and expected pollutant discharges to the POTW.
3. Compliance Certification. A statement, reviewed by the user’s authorized representative as defined in VMC 14.10.040 and certified by a qualified professional indicating whether pretreatment standards are being met on a consistent basis, and, if not, whether additional operation and maintenance (O&M) and/or additional pretreatment steps are required to meet the pretreatment standards and requirements.
4. Compliance Schedule. While new sources must install the treatment required to meet the pretreatment standards prior to operation, existing sources may be granted a compliance schedule where they must provide additional pretreatment and/or O&M to meet the pretreatment standards. In such cases, the user shall propose the shortest schedule by which they can provide the additional pretreatment and/or O&M. The completion date which the user proposes in this schedule may not be later than the compliance date established for the applicable pretreatment standard. Any compliance schedule authorized pursuant to this section must also meet the requirements set out in VMC 14.10.310.
5. Signature and Report Certification. All baseline monitoring reports must be certified in accordance with VMC 14.10.430(A) and signed by an authorized representative as defined by VMC 14.10.040. (Ord. M-4431 § 3, 2023; Ord. M-3970 § 2, 2010)