influent monitoring - California State Water Resources Control Board

influent monitoring - California State Water Resources Control Board

CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION MONITORING AND REPORTING PROGRAM NO. FOR OAKWOOD LAKE WATER DISTRICT AND BECK PR...

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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION MONITORING AND REPORTING PROGRAM NO. FOR OAKWOOD LAKE WATER DISTRICT AND BECK PROPERTIES, INC. WASTEWATER TREATMENT PLANT SAN JOAQUIN COUNTY This Monitoring and Reporting Program (MRP) describes requirements for monitoring influent wastewater, treated effluent, effluent storage ponds, recycled water land application areas, groundwater, sludge, and water supply. This MRP is issued pursuant to Water Code Section 13267. The Discharger shall not implement any changes to this MRP unless and until a revised MRP is issued by the Executive Officer. Regional Board staff shall approve specific sample station locations prior to implementation of sampling activities. This MRP is effective upon date of signature; however, portions of the MRP will not be relevant until the Wastewater Treatment Plant (WWTP) is expanded and is in use. In the meantime, the Discharger shall submit the monitoring data that is possible to collect, monthly construction status reports, and quarterly groundwater monitoring reports as described in the “Reporting” section of this MRP. All samples shall be representative of the volume and nature of the discharge or matrix of material sampled. The time, date, and location of each grab sample shall be recorded on the sample chain of custody form. Field test instruments (such as those used to measure pH and dissolved oxygen) may be used provided that: 1. The operator is trained in proper use and maintenance of the instruments; 2. The instruments are calibrated prior to each monitoring event; 3. The instruments are serviced and/or calibrated by the manufacturer at the recommended frequency; and 4. Field calibration reports are submitted as described in the “Reporting” section of the MRP. INFLUENT MONITORING Influent flow monitoring shall be performed at the headworks. Influent monitoring shall include the following: Constituent Flow1 Average Daily Flow2 BOD53 Total Suspended Solids4 1 2 3 4

Units gpd gpd mg/L mg/L

Type of Sample Continuous Meter Calculated Grab Grab

Sampling Frequency Daily Monthly Weekly Weekly

Reporting Frequency Monthly Monthly Monthly Monthly

Flow represents the daily flow rate. Average Daily Flow represents the daily flow rate averaged over the month. BOD denotes 5-day Biochemical Oxygen Demand. Total Suspended Solids shall be performed using a Whatman glass fiber filter with a nominal pore size of about 1.58 μm or equivalent.

MONITORING AND REPORTING PROGRAM NO. OAKWOOD LAKE WATER DISTRICT AND BECK PROPERTIES, INC. WASTEWATER TREATMENT PLANT SAN JOAQUIN COUNTY

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EFFLUENT MONITORING Effluent samples shall be collected before discharge to any effluent storage pond and shall be representative of the volume and nature of the discharge. Effluent monitoring shall include the following: Constituent BOD5 Total Coliform Organisms 2 Turbidity Total Dissolved Solids Sodium Chloride Nitrate as Nitrogen Total Kjeldahl Nitrogen Total Nitrogen (as N) Total Suspended Solids5 pH Standard Minerals 6 1. 2. 3.

4. 5. 6.

Units mg/L MPN/100 ml 3 NTU 4 mg/L mg/L mg/L mg/L mg/L mg/L mg/L Standard mg/L

Type of Sample Grab/Composite1 Grab Meter Grab/Composite1 Grab/Composite1 Grab/Composite1 Grab/Composite1 Grab/Composite1 Grab/Composite1 Grab/Composite1 Grab/Composite1 Grab/Composite1

Sampling Frequency Weekly Daily Continuous Monthly Monthly Monthly Monthly Monthly Monthly Monthly Monthly Annually

Reporting Frequency Monthly Monthly Monthly Monthly Monthly Monthly Monthly Monthly Monthly Monthly Monthly Annually

Grab/Composite indicates samples may be collected by composite sampler or grab method. Using a minimum of 15 tubes or 3 dilutions. Most probable number per 100 ml. NTU denotes Nephelometric Turbidity Units. Total Suspended Solids shall be performed using a Whatman glass fiber filter with a nominal pore size of about 1.58 μm or equivalent. Standard Minerals shall include, at a minimum, the following elements/compounds: boron, calcium, magnesium, potassium, sulfate, iron, manganese, total alkalinity (including alkalinity series), and hardness.

TREATMENT AND STORAGE POND MONITORING Each treatment and recycled water storage pond shall be monitored as specified below: Constituent Dissolved Oxygen 1 Freeboard pH Odors Liner condition Berm condition 1

Units

Type of Sample

Sampling Frequency

Reporting Frequency

mg/L 0.1 feet Standard ----

Grab Measurement Grab Observation Observation Observation

Weekly Weekly Weekly Weekly Weekly Monthly

Monthly Monthly Monthly Monthly Monthly Monthly

Samples shall be collected at a depth of one foot from each pond in use, opposite the inlet. Samples shall be collected between 0700 and 0900 hours.

MONITORING AND REPORTING PROGRAM NO. OAKWOOD LAKE WATER DISTRICT AND BECK PROPERTIES, INC. WASTEWATER TREATMENT PLANT SAN JOAQUIN COUNTY

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RECYCLED WATER LAND APPLICATION AREA MONITORING Monitoring of each recycled water land application area shall be conducted daily during the irrigation season, and the results shall be included in the monthly monitoring report. All land application areas shall be inspected following an irrigation event to identify any equipment malfunction or other circumstance that might allow recycled water to runoff the land application area and/or create ponding conditions that violate the Waste Discharge Requirements. Evidence of erosion, saturation, irrigation runoff, or the presence of nuisance conditions shall be noted in the report. A log of these inspections as well as any public complaints of runoff shall be kept at the facility and made available for review upon request. Effluent monitoring results shall be used in calculations to ascertain loading rates at the land application area. Monitoring of the land application area shall include the following:

1

2

Constituent Flow Rainfall Acreage Applied 1 Water Application Rate 2 Total Nitrogen Loading Rate 2 Nitrogen from Fertilizer Application

Units Gallons Inches Acres gal/acre·day lbs/ac·month lbs/ac·month

Type of Sample Continuous Observation Calculated Calculated Calculated Calculated

Total Dissolved Solids Loading Rate 2

lbs/ac·month

Calculated

Sampling Frequency Daily Daily Daily Daily Monthly Monthly

Reporting Frequency Monthly Monthly Monthly Monthly Monthly Monthly

Monthly

Monthly

Land application areas shall be identified and a map identifying all land application areas included. For each land application area, including other sources of nitrogen including fertilizers.

GROUNDWATER MONITORING Prior to construction and/or sampling of any groundwater monitoring wells, the Discharger shall submit plans and specifications to the Board for review and approval. All wells identified in the groundwater monitoring well network shall be sampled and analyzed according to the schedule below. Prior to sampling, the groundwater elevations shall be measured and the wells shall be purged at least three well volumes until temperature, pH, and electrical conductivity have stabilized. Depth to groundwater shall be measured to the nearest 0.01 feet. Samples shall be collected using standard EPA methods. Groundwater monitoring shall include, at a minimum, the following:

Constituent Depth to Groundwater Groundwater Elevation 1 Gradient Gradient Direction Total Dissolved Solids

Units 0.01 feet 0.01 feet feet/feet Degrees mg/L

Type of Sample Measurement Calculated Calculated Calculated Grab

Sampling and Reporting Frequency Quarterly Quarterly Quarterly Quarterly Quarterly

MONITORING AND REPORTING PROGRAM NO. OAKWOOD LAKE WATER DISTRICT AND BECK PROPERTIES, INC. WASTEWATER TREATMENT PLANT SAN JOAQUIN COUNTY

Constituent Nitrate as Nitrogen Total Kjeldahl Nitrogen pH Trihalomethanes 2 Boron Chloride Iron Manganese Sodium Total Coliform Organisms Standard Minerals 3 1 2 3

Units mg/L mg/L pH units μg/l mg/L mg/L mg/L mg/L mg/L MPN/100 mL mg/L

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Type of Sample Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab Grab

Sampling and Reporting Frequency Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Annually

Groundwater elevation shall be determined based on depth-to-water measurements using a surveyed measuring point elevation on the well and a surveyed reference elevation. Individual trihalomethane constituent concentrations shall be identified, using EPA Method 8260B or equivalent. Standard Minerals shall include, at a minimum, the following elements/compounds: calcium, magnesium, potassium, sulfate, total alkalinity (including alkalinity series), and hardness.

SLUDGE MONITORING A composite sample of digested sludge shall be collected at least once per year when sludge is removed from the wastewater treatment system for disposal in accordance with EPA's POTW Sludge Sampling and Analysis Guidance Document, August 1989, and analyzed for cadmium, copper, nickel, chromium, lead, and zinc. Sampling records shall be retained for a minimum of five years. A log shall be kept of sludge quantities generated and of handling and disposal activities. The frequency of entries is discretionary; however, the log should be complete enough to serve as a basis for part of the annual report. WATER SUPPLY MONITORING A sampling station shall be established where a representative sample of the municipal water supply can be obtained. Water supply monitoring shall include at least the following for each water source used during the previous year: Constituents Total Dissolved Solids pH Standard Minerals 1 1

Units mg/L Std. Unit mg/L

Sampling Frequency Annually Annually Annually

Standard Minerals shall include, at a minimum, the following elements/compounds: boron, calcium, magnesium, sodium, potassium, chloride, nitrogen, sulfate, iron, manganese, total alkalinity (including alkalinity series), and hardness.

MONITORING AND REPORTING PROGRAM NO. OAKWOOD LAKE WATER DISTRICT AND BECK PROPERTIES, INC. WASTEWATER TREATMENT PLANT SAN JOAQUIN COUNTY

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REPORTING In reporting monitoring data, the District shall arrange the data in tabular form so that the date, sample type (e.g., effluent, pond, etc.), and reported analytical result for each sample are readily discernible. The data shall be summarized in such a manner to clearly illustrate compliance with waste discharge requirements and spatial or temporal trends, as applicable. The results of any monitoring done more frequently than required at the locations specified in the Monitoring and Reporting Program shall be reported to the Regional Board. As required by the California Business and Professions Code Sections 6735, 7835, and 7835.1, all Groundwater Monitoring Reports shall be prepared under the direct supervision of a Registered Engineer or Geologist and signed by the registered professional. A.

Monthly Monitoring Reports Daily, weekly, and monthly monitoring data shall be reported in monthly monitoring reports. Monthly reports shall be submitted to the Regional Board on the 1st day of the second month following sampling (i.e. the January Report is due by 1 March). At a minimum, the reports shall include: 1. Until construction is complete at the expanded WWTP, the report shall describe the construction progress to date. 2. The report shall include the following: a. Results of influent; effluent; treatment and recycled water storage ponds; and recycled water land application area monitoring. b. A comparison of monitoring data to the discharge specifications and an explanation of any violation of those requirements. Data shall be presented in tabular format; c. If requested by staff, copies of laboratory analytical report(s); and d. A calibration log verifying calibration of all hand-held monitoring instruments and devices used to comply with the prescribed monitoring program.

B.

Quarterly Monitoring Reports The Discharger shall establish a quarterly sampling schedule for groundwater monitoring such that samples are obtained approximately every three months. Quarterly monitoring reports shall be submitted to the Board by the 1st day of the second month after the quarter (i.e. the January-March quarterly report is due by May 1st) and may be combined with the monthly report. The Quarterly Report shall include the following: 1. Results of groundwater monitoring;

MONITORING AND REPORTING PROGRAM NO. OAKWOOD LAKE WATER DISTRICT AND BECK PROPERTIES, INC. WASTEWATER TREATMENT PLANT SAN JOAQUIN COUNTY

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2. A narrative description of all preparatory, monitoring, sampling, and analytical testing activities for the groundwater monitoring. The narrative shall be sufficiently detailed to verify compliance with the WDR, this MRP, and the Standard Provisions and Reporting Requirements. The narrative shall be supported by field logs for each well documenting depth to groundwater; parameters measured before, during, and after purging; method of purging; calculation of casing volume; and total volume of water purged; 3. Calculation of groundwater elevations, an assessment of groundwater flow direction and gradient on the date of measurement, comparison of previous flow direction and gradient data, and discussion of seasonal trends if any; 4. A narrative discussion of the analytical results for all groundwater locations monitored including spatial and temporal tends, with reference to summary data tables, graphs, and appended analytical reports (as applicable); 5. A comparison of monitoring data to the groundwater limitations and an explanation of any violation of those requirements; 6. Summary data tables of historical and current water table elevations and analytical results; 7. A scaled map showing relevant structures and features of the facility, the locations of monitoring wells and any other sampling stations, and groundwater elevation contours referenced to mean sea level datum; and 8. Copies of laboratory analytical report(s) for groundwater monitoring. C.

Annual Report An Annual Report shall be prepared as the fourth quarter monitoring report. The Annual Report will include all monitoring data required in the monthly/quarterly schedule. The Annual Report shall be submitted to the Regional Board by 1 February each year. In addition to the data normally presented, the Annual Report shall include the following: 1. The contents of the regular groundwater monitoring report for the last sampling event of the year; 2. If requested by staff, tabular and graphical summaries of all data collected during the year; 3. An evaluation of the groundwater quality beneath the wastewater treatment facility, recycled water storage ponds, and land application areas; 4. A discussion of compliance and the corrective actions taken, as well as any planned or proposed actions needed to bring the discharge into full compliance with the waste discharge requirements; 5. A discussion of any data gaps and potential deficiencies/redundancies in the monitoring system or reporting program; 6. A copy of the certification for each certified wastewater treatment plant operator working at the facility and a statement about whether the Discharger is in compliance with Title 23, CCR, Division 3, Chapter 26.

MONITORING AND REPORTING PROGRAM NO. OAKWOOD LAKE WATER DISTRICT AND BECK PROPERTIES, INC. WASTEWATER TREATMENT PLANT SAN JOAQUIN COUNTY

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7. Summary of information on the disposal of sludge and/or solid waste; 8. The results from annual monitoring of the groundwater wells and water supply; 9. The results from any sludge monitoring required by the disposal facility; 10. Equipment maintenance and calibration records, as described in Standard Provision No. C.4; and 11. A forecast of influent flows, as described in Standard Provision No. E.4. A letter transmitting the self-monitoring reports shall accompany each report. Such a letter shall include a discussion of requirement violations found during the reporting period, and actions taken or planned for correcting noted violations, such as operation or facility modifications. If the Discharger has previously submitted a report describing corrective actions and/or a time schedule for implementing the corrective actions, reference to the previous correspondence will be satisfactory. The transmittal letter shall contain the penalty of perjury statement by the Discharger, or the Discharger's authorized agent, as described in the Standard Provisions General Reporting Requirements Section B.3. The Discharger shall implement the above monitoring program on the first day of the month following adoption of this Order. Ordered by: PAMELA C. CREEDON, Executive Officer

(Date) TRO:

10/6/06