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Table 11-4.1.9 PAM and Water Application Rates (continued) Disturbed Area (ac) PAM (Ibs) Water (gal) 3.00 2.00 31000 3.50 2.33 37500 4.00 2.65 41000 4.50 3.00 47500 15.00 13.33 15,000 The Preferred Method: . 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). . PAM has infinite solubility in water, but dissolves very slowly. Dissolve pre -meas- ured dry granular PAM with a known quantity of clean water in a bucket several hours or overnight. Mechanical mixing will help dissolve the PAM. Always add PAM to water - not water to PAM. • Pre -fill the water truck about 1 /8 full with water. The water does not have to be pot- able, but it must have relatively low turbidity — in the range of 20 NTU or less. • Add PAM /Water mixture to the truck • Completely fill the water truck to specified volume. • Spray PAM/Water mixture onto dry soil until the soil surface is uniformly and com- pletely wetted. An Alternate Method: PAM may also be applied as a powder at the rate of 5 lbs. per acre. This must be applied on a day that is dry. For areas less than 5-10 acres, a hand-held "organ grinder" fertilizer spreader set to the smallest setting will work. Tractor -mounted spreaders will work for lar- ger areas. The following shall be used for application of powdered PAM: . Powered PAM shall be used in conjunction with other BMPs and not in place of other BMPs. Do not use PAM on a slope that flows directly into a stream or wetland. The storm - water runoff shall pass through a sediment control BMP prior to discharging to sur- face waters. • Do not add PAM to water discharging from site. • When the total drainage area is greater than or equal to 5 acres, PAM treated 2014 Stormwater Management Manual for Western Washington 1 1 1 f1 1 1 1 I 1 1 [I I f� 1 1 1 Volume 11 - Chapter 4 - Page 302