1710 W MARINE VIEW DR 2024-01-03

1. Pre -measure the area where PAM is to be applied and calculate the amount of product and water necessary to provide coverage at the specified application rate (2/3 pound PAM/1000 gallons/acre). 2. PAM has infinite solubility in water, but dissolves very slowly. Dissolve pre -measured dry gran- ular PAM with a known quantity of dean water in a bucket several hours or overnight. Mech- anical mixing will help dissolve the PAM. Always add PAM to water - not water to PAM. 3. Pre -fill the water truck about 1 /8 full with water. The water does not have to be potable, but it must have relatively low turbidity— in the range of 20 NTU or less. 4. Add the PAM/Water mixture to the truck. 5. Completely fill the water truck to the specified volume. 6. Spray the PAM/Water mixture onto dry soil, until the soil surface is uniformly and completely wetted. An Alternate Application Method PAM may also be applied as a powder at the rate of 5 Ibs per acre. This must be applied on a day that is dry. For areas less than 10 acres, a hand-held "organ grinder" fertilizer spreader set to the smallest setting will work. For efficiency, tractor -mounted spreaders will work for larger areas. The following shall be used for application of powdered PAM: . Powdered PAM shall be used in conjunction with other BMPs and not in place of other BMPs. . Keep the granular PAM supply out of the sun. Granular PAM loses its effectiveness in three months after exposure to sunlight and air. . Proper application and re -application plans are necessary to ensure total effectiveness of PAM usage. Safetv and Toxicit PAM, combined with water, is very slippery and can be a safety hazard. Care must be taken to pre- vent spills of PAM powder onto paved surfaces. During an application of PAM, prevent over -spray from reaching pavement to avoid the pavement becoming slippery. If PAM powder gets on skin or clothing, wipe it off with a rough towel rather than washing with water. Washing with water will make cleanup messier and take longer. Some PAMs are more toxic and carcinogenic than others. Only the most environmentally safe PAM products should be used. The specific PAM copolymer formulation must be anionic. Cationic PAM shall not be used in any application because of known aquatic toxicity problems. Use only the highest drinking water grade PAM, certified for compliance with NSF International (N S F)/American National Stand- ards Institute (ANSI) Standard 60 for drinking water treatment, for soil applications. Recent media attention and high interest in PAM has resulted in some entrepreneurial exploitation of the term "poly- mer." All PAM are polymers, but not all polymers are PAM, and not all PAM products comply with ANSI/NSF Standard 60. PAM use shall be reviewed and approved by the local permitting authority. 2019 Stormwater Management Manual for Western Washington Volume // - Chapter 3 - Page 306