Page 37 - California Stormwater Workshop Handouts

Industrial General Permit Order

iv. Ensure all NSWDs are described in the SWPPP. This description
shall include the source, quantity, frequency, and characteristics of
the NSWDs, associated drainage area, and whether it is an
authorized or unauthorized NSWD in accordance with Section IV.

f. Erodible Surfaces

The Discharger shall ensure the SWPPP includes a description of the
facility locations where soil erosion may be caused by industrial activity,
contact with storm water, authorized and unauthorized NSWDs, or run-
on from areas surrounding the facility.

2. Assessment of Potential Pollutant Sources

a. The Discharger shall ensure that the SWPPP includes a narrative
assessment of all areas of industrial activity with potential industrial
pollutant sources. At a minimum, the assessment shall include:

i. The areas of the facility with likely sources of pollutants in industrial
storm water discharges and authorized NSWDs;

ii. The pollutants likely to be present in industrial storm water
discharges and authorized NSWDs;

iii. The approximate quantity, physical characteristics (e.g., liquid,
powder, solid, etc.), and locations of each industrial material handled,
produced, stored, recycled, or disposed;

iv. The degree to which the pollutants associated with those materials
may be exposed to, and mobilized by contact with, storm water;

v. The direct and indirect pathways by which pollutants may be exposed
to storm water or authorized NSWDs;

vi. All sampling, visual observation, and inspection records;

vii. The effectiveness of existing BMPs to reduce or prevent pollutants in
industrial storm water discharges and authorized NSWDs;

viii.The estimated effectiveness of implementing, to the extent feasible,
minimum BMPs to reduce or prevent pollutants in industrial storm
water discharges and authorized NSWDs; and,

ix. The identification of the industrial pollutants related to the receiving
waters with 303(d) listed impairments identified in Appendix 3 or
approved TMDLs that may be causing or contributing to an
exceedance of a water quality standard in the receiving waters.

b. Based upon the assessment above, Dischargers shall identify in the
SWPPP any areas of the facility where the minimum BMPs described in

Order 2014-0057-DWQ 29