7000 HARDESON RD 2018-01-02 MF Import

JUL 24196 17:01 FR W & H PACIFIC 206 822 5341 ro 12esz5seez9 P.07i09 FdJ June 11, 1996 Mr. Michael Crowson, P.E. W&H Pacific, Inc. 3025 1126 Avenue NE PO Box C-97304 Bellevue, WA 99009-9304 RE: Responses to Cky of Everett Commeit on the Compost Storm Water Filter Dear Mike: It is my understanding that there are some issues and concerns regarding the operation of the Type II Compost storm water filter for the Community Transit Maintenance Facility. The first issue is in regard to what kind of warranty CSF Treatment Systems will make u to the operation of the unit. Basically, CSFTS carrot provide a warranty with t aspect to levels of treaunent This is primarily because the exact volumes and pollutant characteristics of the storm water is unknown. However, i can provide testament as a professional engineer that the data presented for the system in the BMP documents submitted to CT are factual and representative of how the system should operate in the field. I should also point out the design engineers do not provide warrantees on the level of treatment of conventional BMPs such as ponds or swale. Our business is water quality treatment Our ftrture relies on customer service, research and development, and providing a quality product. As part of our commitment, we will provide continuing support to the parson(3) providing operations and maintenance to this facility. There are some concerns about the nature of the pollutants being generated on the site. It is my understanding that the primary runoff surfwe is parking lot surface. Assuming that the owner provides periodic sweeping and catch basin maintenance, this facility is appropriately sized. Like any other BMP, source control will enhance the operation and longevity of the filter system. The City of Everett has also provided a set of review comments for the compost filter. Below ate responses to the comments that are supplemental to the BMP document we have submitted for the City's review. A draft O&M Manual for the Type II open unlit is almost complete, upon completion, we will send it to the City. -fi,:s rrranual i5 rehutr,24, per- 4iv 5E1q 11vr Ci �,j reu;ew and typprovaI . E�j 07/24/96 16:52 TX/RX N0.0327 P.007