Laserfiche WebLink
1 Table 1 <br />Discharge Limitation <br />Discharge Limitation Measurement <br />Effluent Parameter (Daily Maximum Concentration) Frequency Sample Types" <br />7 Flow, MGD Reports'-' Monthly Instantaneous <br />J or Continuous <br />pH, standard units 6.5-9.0 Monthly Grab <br />(minimum-maximum) <br />Oil and Grease (mg/I) 10°' Monthly Visuals" <br />(no visible sheens) <br />Settleable Solids (mg/I)t" 0.5 Monthly Grab <br />Total Dissolved Solids (mg/I) Report Quarterly Grab <br />m Definitions of Sample Type <br />A "grab" sample, for monitoring requirements, is a single "dip and take" sample. <br />An "instantaneous" measurement, for monitoring requirements, is a single reading, <br />observation, or measurement performed on site. <br />A "continuous" measurement, for flow monitoring requirements, is a measurement obtained <br />from an automatic recording device which continually measures flow. <br />A "visual" observation, fot oil and grease monitoring requirements, is observing the discharge <br />' to check for the presence of a visible sheen or [loafing oil. <br />tz~ This limitation is determined by a single sample or set or of samples as required by Part 1 B.3, Sample <br />t Type. <br />or In the event an oil sheen or floating oil is observed, a grab sample will be collected, analyzed, and <br />reported. In addition, corrective action will be taken immediately to mitigate the discharge of oil and <br />grease. <br />s°' Procedure for determining settleable solids is contained in 40 CFR 434.64. The method detection <br />' limit for measuring settleable solids under this part will be 0.4 ml/I. <br />' Sources: Colorado Depanment of Health, (Coal Mining General Permit) and 40 CFR Part 434.64. <br /> <br />1 <br />1 <br />