Page 189 - California Stormwater Workshop Handouts

ATTACHMENT G

REQUIREMENTS FOR DISCHARGERS WHO HAVE BEEN GRANTED AN
OCEAN PLAN EXCEPTION FOR DISCHARGES TO ASBS

a. a demonstration of significant hardship by showing that the Discharger has
made timely and complete applications for all available bond and grant
funding, and either no bond or grant funding is available, or bond and/or grant
funding is inadequate.

b. for governmental agencies, a demonstration and documentation of a good
faith effort to acquire funding through that agency’s budgetary process, and a
demonstration that funding was unavailable or inadequate.

G. Sampling and Analysis Requirements

1. Monitoring is mandatory for all ASBS Dischargers to assure compliance with the
Ocean Plan. Monitoring requirements include both: (1) Core Discharge
Monitoring and (2) Ocean Receiving Water Monitoring (see Sections H. and I.
below). The State and Regional Water Boards must approve sampling site
locations and any adjustments to the monitoring programs. All ocean receiving
water and reference area monitoring must be comparable with the Water Boards’
Surface Water Ambient Monitoring Program (SWAMP).

2. Safety concerns: Sample locations and sampling periods must be determined
considering safety issues. Sampling may be postponed upon notifying the
Executive Director that hazardous conditions prevail.

3. Analytical Chemistry Methods: All constituents must be analyzed using the
lowest minimum detection limits comparable to the Ocean Plan water quality
objectives. For metal analysis, all samples, including storm water effluent,
reference samples, and ocean receiving water samples, must be analyzed by the
approved analytical method with the lowest minimum detection limits (currently
Inductively Coupled Plasma/Mass Spectrometry) described in the Ocean Plan.

H. Core Discharge Monitoring Program

1. General sampling requirements for timing and storm size:

Runoff must be collected during a storm event that is greater than 0.1 inch and
generates runoff, and at least 72 hours from the previously measurable storm
event. Runoff samples shall be collected during the same storm and at
approximately the same time when post-storm receiving water is sampled, and
analyzed for the same constituents as receiving water and reference site
samples as described in Section I. below.

2. Runoff flow measurements

a. For industrial storm water outfalls in existence as of December 31, 2007,
18 inches (457mm) or greater in diameter/width (including multiple outfall
pipes in combination having a width of 18 inches, runoff flows must be

Order 2014-0057-DWQ 8