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I I i 1 .0 The Isolator Row I 1.1 INTRODUCTION The Isolator Row is typically designed to capture the An important component of any Stormwater Pollution "first flush"and offers the versatility to be sized on a vol- Prevention Plan is inspection and maintenance.The ume basis or flow rate basis. An upstream manhole not I StormTech Isolator Row is a patent pending technique only provides access to the Isolator Row but typically to inexpensively enhance Total Suspended Solids(TSS) includes a high flow weir such that storm water flowrates removal and provide easy access for inspection and or volumes that exceed the capacity of the Isolator Row maintenance. overtop the over flow weir and discharge through a I manifold to the other chambers. The Isolator Row may also be part of a treatment train. s, \\' s, By treating storm water prior to entry into the chamber system, the service life can be extended and pollutants such as hydrocarbons can be captured. Pre-treatment best management practices can be as simple as deep sump catch basins, oil-water separators or can be inno- (00.-7/. vative storm water treatment devices. The design of I the treatment train and selection of pretreatment devices Z by the design engineer is often driven by regulatory requirements.Whether pretreatment is used or not,the Isolator Row is recommended by StormTech as an effective means to minimize maintenance requirements and maintenance costs. • I - Note:See the StormTech Design Manual for detailed Looking down the Isolator Row from the manhole opening, woven information on designing inlets for a StormTech system, geotextile is shown between the chamber and stone base. including the Isolator Row. 1.2 THE ISOLATOR`"ROW I The Isolator Row is a row of StormTech chambers, either Stor Tech Isolator Row with Overflow Spillway (not to scale) SC-310, SC-740 or MC-3500 models,that is surrounded OPTIONAL with filter fabric and connected to a closely located man- PRE-TREATMENT Ihole for easy access. The fabric-wrapped chambers provide for settling and filtration of sediment as storm water rises in the Isolator Row and ultimately passes STORMTECH I through the filter fabric.The open bottom chambers and ISOLATOR ROW perforated sidewalls allow storm water to flow both verti- cally and horizontally out of the chambers. Sediments � � N.'. are captured in the Isolator Row protecting the storage MANHOLE =I areas of the adjacent stone and chambers from sedi- WITH = i ment accumulation. OVERFLOW WEIR f 1 Two different fabrics are used for the Isolator Row. A I woven geotextile fabric is placed between the stone = : r and the Isolator Row chambers.The tough geotextile \ provides a media for storm water filtration and provides ECCENTRIC zr J a durable surface for maintenance operations. It is also — 1 designed to prevent scour of the underlying stone and J remain intact during high pressure jetting.A non-woven r ) fabric is placed over the chambers to provide a filter — ) media for flows passing through the perforations in the — r I sidewall of the chamber. OPTIONAL --� ACCESS -STORMTECH CHAMBERS 2 Call StormTech at 888.892.2694 or visit our website at www.stor tech.co for technical and product information. I