Page 128 - California Stormwater Workshop Handouts

Industrial General Permit Fact Sheet

a reporting year due to the fact that four QSEs did not occur are not required to
make up these sampling events in subsequent reporting years.

The State Water Board recognizes that each facility has unique physical
characteristics, industrial activities, and/or variations in BMP implementation and
performance which warrants the requirement that each facility demonstrate its
compliance. Figure 3 of this Fact Sheet provides a summary of all the monitoring-
related requirements of this General Permit. This General Permit’s monitoring
requirements include sampling and analysis requirements for specific indicator
parameters that indicate the presence of pollutants in industrial storm water
discharges. The “indicator parameters” are oil and grease (for petroleum
hydrocarbons), total suspended solids (for sediment and sediment bound
pollutants) and pH (for acidic and alkaline pollutants). Additionally, Dischargers are
required to evaluate their facilities and analyze samples for additional facility-
specific parameters. These monitoring program requirements are designed to
provide useful, cost-effective, timely, and easily obtained information to assist
Dischargers as they identify their facility’s pollutant sources and implement
corrective actions and revise BMPs as necessary (Section XI.A.4 of this General
Permit).

This General Permit requires a combination of visual observations and analytical
monitoring. Visual observations provide Dischargers with immediate information
indicating the presence of many pollutants and their sources. Dischargers must
implement timely actions and revise BMPs as necessary (Section XI.A.4) when the
visual observations indicate pollutant sources have not been adequately addressed
in the SWPPP. Analytical monitoring provides an additional indication of the
presence and concentrations of pollutants in storm water discharge. Dischargers
are required to evaluate potential pollutant sources and corresponding BMPs and
revise the SWPPP appropriately when specific types of NAL exceedances occur as
described below.

Order 2014-0057-DWQ 44