This
Fact Sheet provides Best Management Practices (BMPs) that are recommended for
facilities that grow and sell plants and conduct other landscaping activities.
Potential
Pollutant Sources
The following activities are
potential sources of pollutants:
·
Irrigation
·
Garden waste disposal
·
Chemical usage
Pollutants may include:
·
Nutrients (fertilizers, plant wastes)
·
Pesticides
·
Heavy metals (copper, lead, and zinc)
·
Sediments
Pollution
Prevention
Implementation of pollution prevention measures may reduce
or eliminate the need to implement other more costly or complicated procedures.
The following pollution prevention principles apply to most
facilities:
- Use
alternative, safer, non-toxic, and/or recycled products;
- Reduce
storm water flow across the site and redirect flows away from storm drains,
gutters, and streets;
- Reduce
the use of water and/or use dry methods;
- Recycle
and reuse waste products and waste flows; and
Best
Management Practices and Procedures
GENERAL
►
Maintain facility grounds and move or cover activities and
materials to prevent contact with storm water.
►
Promote native plants when possible to help conserve water filter
impurities, reduce the need for toxic pesticides, fertilizers, and herbicides.
►
Stencil on-site storm drains.
IRRIGATION
►
Use intermittent (pulse) or drip irrigation to conserve water and
prevent discharges.
►
Regularly inspect irrigation systems for leaks to prevent
excessive runoff from occurring.
►
Convert paved or bare soil areas to vegetation that will slow
runoff (turf grasses or other comparable plant materials), if feasible.
►
Group plants with similar water needs together to improve
irrigation efficiency.
►
During warm summer months, irrigate only after 6 PM and before 11
AM to reduce evaporation.
GARDEN WASTE
DISPOSAL
►
As of June 1, 2004, it is illegal to place green waste in the
street.
►
Do not dispose of garden wastes in streets, waterways, or storm
drains.
CHEMICAL USAGE
Storage and Disposal
►
Implement storage requirements for pesticide, herbicide, and
fertilizer products with guidance from the local fire department and/or County
Agricultural Commissioner.
►
Provide secondary containment for chemical storage.
►
Dispose of empty containers according to the instructions on the
container label.
Pesticide Usage
►
Follow manufacturers’ recommendations and label directions.
►
Use the minimum amount of chemicals needed for the job.
►
Use pesticides only if there is an actual pest problem (not on a
regular preventative schedule). Avoid
the use of copper-based pesticides, if possible.
►
Do not apply pesticides if rain is expected or if wind speeds are
above 5 mph.
►
Do not mix or prepare pesticides within 100 feet of any well,
stream, or pond.
►
Do not dispose of unused pesticides by washing them down the
drains. Dispose of unused
pesticides as hazardous waste.
►
Employ techniques to minimize off-target applications (e.g. spray
drift) of pesticides, including consideration of alternative application
techniques.
►
Careful soil mixing and layering techniques using a topsoil mix or
composted organic material can be used as an effective measure to reduce
herbicide use and watering.
Fertilizer Usage
►
Periodically test soils to determine proper fertilizer use.
►
If feasible, spread out applications of controlled-release
fertilizers and use split applications of soluble fertilizers over the growing
season.
►
Work fertilizers into the soil rather than dumping or broadcasting
them.
►
Transition from the use of soluble fertilizers to
controlled-release fertilizers. Use
slow release fertilizers whenever possible to minimize leaching.
Reduce or eliminate routine leaching of crops.
SPILL CONTROL
►
Develop and maintain a spill response plan.
►
Place an adequate stockpile of spill cleanup materials where it
will be readily available.
►
Spot clean leaks and drips routinely.
►
Clean leaks, drips, and other spills with as little water as
possible. Use rags for small
spills, a damp mop for general cleanup, and dry absorbent material for larger
spills.
►
Sweep pavement and sidewalk if chemicals are spilled on these
surfaces before applying irrigation water.
►
Keep the spill from entering the street, gutter, or storm drain.
►
Do not use bleach or disinfectants if there is a possibility that
rinse water could flow to a street, gutter, or storm drain.
Employee
Training
·
Train employees on these practices.
·
Train staff on the proper maintenance of the facility.
·
Train employees on the facility’s spill control plan and proper
spill containment and cleanup procedures.
·
Establish a regular training schedule, train all new employees,
and conduct annual refresher training.
·
Use a training log or similar method to document training.
PHONE NUMBERS San Joaquin County Stormwater Management
468-3055
San Joaquin County Sanitary Sewer Agency 468-3090
City of Stockton Stormwater Management
937-8791
City of Stockton Sanitary Sewer Agency
937-8750
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