Management Strategies for Copper Sources in Urban Runoff
Cooling Water Systems
Investigations conducted by the RWQCP determined that cooling water systems were a significant source of water pollutants, especially copper and tributyltin.
Vehicle Service Facilities and Car Washes
Of the 305 vehicle service facilities regulated by the RWQCP in 1998, 247 chose to be zero dischargers (no discharge to the sanitary sewer or storm drain) and about 58 facilities were permitted to treat their wastewater and discharge it to the sanitary sewer.
Copper-Based Root Control Products
In 1992, all cities in the RWQCP service area prohibited the discharge of copper-based root control products to the sewer system. Unfortunately, the RWQCP lacked legal authority to ban the sale of the root control products and could not prevent purchase and use of products from large regional stores in neighboring towns. Since the root killer
Corrosion of Copper Piping
Approximately 58% of the copper discharged from the RWQCP comes from corrosion of copper pipes in homes and businesses. During 1995, Dr. Moran managed an investigation of copper piping corrosion and potential corrosion reduction measures. The study, which was conducted by Dr. Moran and a consultant in coordination with City of Palo Alto Planning and Utilities Department staff and the City of San Jose, involved the following tasks:
Vehicle Brake Pads
In May 1999 brake manufacturers promised to conduct additional cooperative research on the environmental impacts of vehicle brakes, and to reformulate products to reduce brake-related copper problems in rivers and estuaries and to prevent future environmental problems from brakes.
It is good to see they are looking at everybody and were are not the sole target
Boats and ships coated with copper-containing
biocides may release copper directly into the Bay during storage, operation, and in-water
maintenance. On-shore maintenance activities have the potential to release copper into
Its pretty unclear how BIG are contribution is
say compared to household plumbing
Treating all urban runoff in the Bay Area is almost certainly financially and
technically infeasible under current conditions.Typical runoff treatment systems have
incomplete copper removal; removal of dissolved copper is even more difficult
than removal of total copper.26 Without maintenance, performance of runoff
treatment systems can fall to near zero over a period of a few years. Costs for
treatment include costs for installation and maintenance, and costs to ensure that
treatment systems meet performance standards. Installing runoff treatment
devices for existing developments poses potentially significant retrofitting costs.
It would seem to me there NOT real sure what % of the "problem" is from boats