| CA-WSER-SOR-2012-139#001 | chemical | environmental | mandatory | Carbonaceous Biochemical Oxygen Demand (CBOD5) | wastewater | MAC | 25 mg/L | Average carbonaceous biochemical oxygen demand due to the quantity of CBOD matter in the effluent. Under transitional authorization: up to 1.25× the baseline average (if >25 mg/L) or 25 mg/L otherwise. | Average concentration over defined averaging period (monthly/quarterly/annual depending on system volume) | high |
| CA-WSER-SOR-2012-139#002 | physical | environmental | mandatory | Suspended Solids (SS) | wastewater | MAC | 25 mg/L | Average concentration of suspended solids in the effluent. Results from algae blooms or aquatic invertebrate proliferation (May-November) may be excluded. Under transitional authorization: up to 1.25× the baseline average (if >25 mg/L) or 25 mg/L otherwise. | Average concentration over defined averaging period. May exclude algae bloom results (May-November). | high |
| CA-WSER-SOR-2012-139#003 | chemical | environmental | mandatory | Total Residual Chlorine - Average | wastewater | MAC | 0.02 mg/L | Average concentration of total residual chlorine in the effluent. | Applies only if chlorine compounds are used in treatment | high |
| CA-WSER-SOR-2012-139#004 | chemical | environmental | mandatory | Total Residual Chlorine - Grab Sample Maximum | wastewater | AO | 0.10 mg/L | Grab sample must not exceed 0.10 mg/L when measured using a total residual chlorine instrument, for systems using chlorine compounds. | Grab sample; applies only if chlorine compounds are used in treatment | high |
| CA-WSER-SOR-2012-139#005 | chemical | environmental | mandatory | Un-ionized Ammonia (NH3) | wastewater | MAC | 1.25 mg/L (as N) | Maximum concentration of un-ionized ammonia in the effluent, expressed as nitrogen (N), at 15°C ± 1°C. Calculated as: total ammonia × 1 ÷ (1 + 10^(9.56 – pH)). Under transitional authorization: up to 1.25× baseline (if ≥1.25 mg/L) or 1.25 mg/L otherwise. | Maximum concentration at 15°C ± 1°C; requires pH measurement for calculation | high |
| CA-WSER-SOR-2012-139#006 | biological | environmental | mandatory | Acute Lethality - Rainbow Trout | wastewater | OG | 50 % mortality (96-hour LC50) | Effluent must not be acutely lethal — defined as killing more than 50% of rainbow trout in a 96-hour test. Reference Method EPS 1/RM/13 (sections 5 or 6). Optional: pH stabilization procedure EPS 1/RM/50. | 96-hour test; applies if average daily volume >2,500 m³/day | high |
| CA-WSER-SOR-2012-139#007 | physical | operational | mandatory | Temperature for Ammonia Measurement | wastewater | requirement | 15 ± 1 °C | Un-ionized ammonia determination must be performed at 15°C ± 1°C. | Required for all un-ionized ammonia measurements | high |
| CA-WSER-SOR-2012-139#008 | monitoring | operational | mandatory | Monitoring Frequency - Continuous Systems ≤2,500 m³/day | wastewater | requirement | 1 per month sample/month | Monthly sampling, each sample taken at least 10 days after any previous sample. Acute lethality yearly with 6+ month separation (after 4 clean quarters). | Continuous systems ≤2,500 m³/day; annual averaging period | high |
| CA-WSER-SOR-2012-139#009 | monitoring | operational | mandatory | Monitoring Frequency - Continuous Systems ≤2,500 m³/day (5+ day retention) | wastewater | requirement | 1 per quarter sample/quarter | Reduced monitoring option for systems with 5+ day retention time. Each sample at least 60 days after previous sample. | Continuous systems ≤2,500 m³/day with ≥5-day retention; quarterly averaging period | high |
| CA-WSER-SOR-2012-139#012 | monitoring | operational | mandatory | Monitoring Frequency - Continuous Systems >50,000 m³/day | wastewater | requirement | 3 per week samples/week | Three times per week, at least 1 day apart. Monthly averaging period. Acute lethality monthly, 21+ days apart. | Continuous systems >50,000 m³/day; monthly averaging period | high |
| CA-WSER-SOR-2012-139#013 | monitoring | operational | mandatory | Volume Measurement Accuracy | wastewater | requirement | ±15 % | Monitoring equipment must provide continuous measurement of daily volume or rate of flow with accuracy of ±15%. | Continuous flow measurement equipment | high |
| CA-WSER-SOR-2012-139#014 | monitoring | operational | mandatory | Volume Measurement Calibration Frequency | wastewater | requirement | 1 per calendar year time/year (min. 5 months apart) | Volume measurement equipment must be calibrated at least once per calendar year and at least 5 months after the most recent calibration. | Flow measurement equipment | high |
| CA-WSER-SOR-2012-139#015 | reporting | administrative | mandatory | Identification Report Submission Deadline | wastewater | requirement | 45 days | Initial identification report must be submitted electronically within 45 days after the wastewater system is put into service. Updates due within 45 days of any change. | Upon commissioning and upon any change to system | high |
| CA-WSER-SOR-2012-139#016 | reporting | administrative | mandatory | Monitoring Report Submission Deadline | wastewater | requirement | 45 days after reporting period end | Monitoring reports (annual, quarterly, or monthly depending on system volume) must be submitted within 45 days after the end of the reporting period. | After end of each reporting period | high |
| CA-WSER-SOR-2012-139#018 | administrative | administrative | mandatory | Record Retention Period | wastewater | requirement | 5 years | Records and reports must be retained for at least 5 years after creation. Identification reports must be retained for 5 years after system decommissioning. | Retention at system location or approved alternate site | high |
| CA-WSER-SOR-2012-139#020 | operational | operational | mandatory | Transitional Authorization Multiplier - CBOD5 and TSS | wastewater | requirement | 1.25× × baseline | Under transitional authorization, CBOD5 and TSS limits are: 1.25× the baseline average if baseline >25 mg/L, or 25 mg/L if baseline ≤25 mg/L. | Applies only during transitional authorization period | high |