CORRESPONDENCE_2006-2012 - Laserfiche WebLink

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as a BMP for storm water. The area in question has several large low spots that allow leachate runoff to pond during the wet season. Cnt inspection photos do not indicate t onding problem so staff has included in Figure 3 and 4 a wet season photo and a current dry season photo for comparison. Staff has recommended to Scotts personnel that the low areas and discharge channels should be "graded to drain" from the site. In addition, the area requires installation of BMPs (i.e. waddles, hay bales, silt fencing, hydroseed) to help eliminate and/or reduce pollutants leaving the site. Discharge channels along the southern boundary should be cleared of debris and constructed to properly drain in preparation of the wet season (Figure 5). Staff inspected the southern property boundary reviewing and evaluating BMPs down to the center drain and ponding area where storm water sample SP-5 is collected. The existing BMPs (hay bales and grass buffer) need reconditioning. Hay bales installed to scrub runoff are weathered and breaking down and likely to be ineffective. Also, the grass buffer along this area is thin and reseeding is necessary to be effective. As shown in Figure 7, compost piles are within 50 feet of facility boundary. Staff has discussed this with Scotts personnel The center drainage and ponding area contained an excessive amount of trash requiring cleanup. The center culvert as shown in Figure 8 should be cleaned of debris in preparation of the wet season. BMPs inspected along the eastern portion of the facility consisted of a grass buffer and berm below the compost and raw material piles. As shown in Figure 9 and 10, the grass buffer is fairly wide and the stand of grass is at this location, which protects Potter Creek from runoff. The grass buffer appears to be an appropriate BMP for the east side slope. Staff recommends the dirt berm be reconditioned prior to every wet season. Staff inspected the ash pile that Scotts plans to use as filler in their soil blending operation. Staff has requested that Scotts use the ash in hopes of reducing the current stockpile. Scotts has agreed not to receive additional ash material for stockpiling until Scotts presents a plan that will isolate the ash from storm events to prevent either wind-borne contaminants or contact storm water from entering Potter Creek. As shown in Figure 11, the ash pile is exposed to the elements. Scotts has placed hay bales at the base of the stockpile to contain or slow contact storm water from leaving the site. Staff recommends the hay bales be replaced as needed. The site inspection ended at the manure stockpile. It was evident from site observations the manure stockpile has not been contained within the site boundaries and that BMPs installed to protect Potter Creek have been ignored. As shown in Figures 12 through 14, manure has been pushed into Potter Creek and has come into contact with surface water where leachate has formed. Staff has recommended Scotts pull back all manure from the creek and reestablish appropriate BMPs to prevent discharge to Potter Creek and remove all manure slough from the roadway. 2 Approved: