Page 54 - California Stormwater Workshop Handouts

Industrial General Permit Order

b. The Qualified Combined Samples justification shall include:

i. Identification and description of each drainage area and
corresponding discharge locations;

ii. A description of the BMPs implemented in the drainage area;

iii. A description of the industrial activities that occur throughout the
drainage area;

iv. A description of the physical characteristics of the drainage area;
and,

v. A rationale that demonstrates that the industrial activities and
physical characteristics of the drainage area(s) are substantially
similar.

c. A Discharger that satisfies the conditions of subsection 5.b.i through iv
above shall submit and certify via SMARTS the revisions to the
Monitoring Implementation Plan that includes the Qualified Combined
Samples justification.

d. Upon submittal of the Qualified Combined Samples justification revisions
in the Monitoring Implementation Plan, the Discharger may authorize the
lab to combine samples of equal volume from as many as four (4)
drainage areas. The Regional Water Board may reject the Qualified
Combined Samples justification and/or request additional supporting
documentation. In such instances, the Discharger is ineligible for the
Qualified Combined Samples justification until the Regional Water Board
approves the Qualified Combined Samples justification.

e. Regional Water Board approval is necessary to combine samples from
more than four (4) discharge locations.

6. Sample Collection and Visual Observation Exceptions

a. Sample collection and visual observations are not required under the
following conditions:

i. During dangerous weather conditions such as flooding or electrical
storms; or,

ii.Outside of scheduled facility operating hours. The Discharger is not
precluded from collecting samples or conducting visual observations
outside of scheduled facility operating hours.

b. In the event that samples are not collected, or visual observations are
not conducted in accordance with Section XI.B.5 due to these
exceptions, an explanation shall be included in the Annual Report.

Order 2014-0057-DWQ 46