Page 166 - California Stormwater Workshop Handouts

ATTACHMENT C

GLOSSARY

Storm Water
Storm water runoff, snowmelt runoff, and storm water surface runoff and drainage.

Storm Water Discharge Associated With Industrial Activity

The discharge from any conveyance which is used for collecting and conveying storm
water and which is directly related to manufacturing, processing, or raw materials
storage areas at an industrial plant as identified in Attachment A of this General Permit.
The term does not include discharges from facilities or activities excluded from the
NPDES program. The term includes, but is not limited to, storm water discharges from
industrial plant yards; immediate access roads and rail lines used or traveled by carriers
of raw materials; manufactured products, waste material, or by-products used or
created by the facility; material handling sites; refuse sites; sites used for the application
or disposal of process wastewaters (as defined at 40 C.F.R. section 401); sites used for
the storage and maintenance of material handling equipment; sites used for residual
treatment, storage, or disposal; shipping and receiving areas; manufacturing buildings;
storage areas (including tank farms) for raw materials, and intermediate and finished
products; and areas where industrial activity has taken place in the past and significant
materials remain and are exposed to storm water. The term does not include
discharges from facilities or activities excluded from the NPDES program under
40 C.F.R. section 122.

Material handling activities include the: storage, loading and unloading, transportation,
or conveyance of any raw material, intermediate product, finished product, by-product,
or waste product. The term excludes areas located on plant lands separate from the
plant's industrial activities, such as office buildings and accompanying parking lots as
long as the drainage from the excluded areas is not mixed with storm water drained
from the above described areas. Industrial facilities (including industrial facilities that are
federally, State, or municipally owned or operated that meet the description of the
facilities listed in this paragraph) include those facilities designated under 40 C.F.R.
section122.26(a)(1)(v).

Structural Controls

Any structural facility designed and constructed to mitigate the adverse impacts of storm
water and urban runoff pollution.

Total Suspended Solids (TSS)

The measure of the suspended solids in a water sample including inorganic substances
such as soil particles, organic substances such as algae, aquatic plant/animal waste,
and particles related to industrial/sewage waste, etc. The TSS test measures the
concentration of suspended solids in water by measuring the dry weight of a solid
material contained in a known volume of a sub-sample of a collected water sample.
Results are reported in mg/L.

Order 2014-0057-DWQ 7