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-4- <br /> Disposal Monitoring - <br /> Pond/Basin Monitoring <br /> Samples should be representative of the volume and nature of the discharge. Time of <br /> collection of grab samples shall be recorded. Samples shall be collected at a depth of <br /> one foot from each pond/basin opposite the inlet. Samples shall be collected between <br /> 0800 and 0900 hours. The following shall constitute UNLINED pond/basin monitoring: <br /> Type of <br /> Parameter Units Sample Sampling Frequency <br /> pH pH Units Grab Monthly <br /> Dissolved Oxygen mg/I Grab Monthly <br /> Nitrate as NO3-N mg/I Grab Monthly <br /> Total Nitrogen mg/I Grab Monthly <br /> Pond Freeboard feet Measurement Monthly <br /> pH monitoring shall be conducted using field measurement devices, or by grab sample <br /> delivered to an analytical laboratory. <br /> The following shall constitute LINED pond/basin monitoring: <br /> Type of <br /> Parameter Units Sample Sampling Frequency <br /> Dissolved Oxygen mg/I Grab Monthly <br /> Pond Freeboard feet Measurement Monthly <br /> Recreation Vehicle (RV) Waste Monitoring <br /> A facility that accepts waste from RVs or other mobile waste systems shall monitor their <br /> small domestic system effluent for the following additional constituents: <br /> Type of <br /> Parameter UaiLs Sample Sampling Frequency <br /> Formaldehyde mg/I Grab Quarterly <br /> Zinc mg/I Grab Quarterly <br /> Phenol mg/I Grab Quarterly <br /> N as Ammonium mg/I Grab Quarterly <br /> Samples shall be collected from locations within the waste stream where the effluent is <br /> representative of the treatment process. For septic tanks, this monitoring is not <br /> required, unless a convenient sampling location, as determined by RWQCB staff, is <br /> available. For activated sludge systems, this will be at the effluent outlet. For <br /> ponds/basins, this will be at the opposite end of the pond/basin from the inlet at a depth <br /> of one foot from the surface of the pond/basin. <br />