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I I 2.0 Isolator Row Inspection/Maintenance StormTech- I2.1 INSPECTION The frequency of Inspection and Maintenance varies `\ is‘....7 774 by location.A routine inspection schedule needs to be U established for each individual location based upon site w�. ! specific variables.The type of land use(i.e. industrial, commercial residential), anticipated pollutant load, per- cent imperviousness, climate, etc. all play a critical role I in determining the actual frequency of inspection and maintenance practices. . : : At a minimum, StormTech recommends annual inspec- MVP ISE ' tions. Initially,the Isolator Row should be inspected every 6 months for the first year of operation. For subsequent years, the inspection should be adjusted based uponli '---1 i,r " ' , previous observation of sediment deposition. t I The Isolator Row incorporates a combination of standard manhole(s)and strategically located inspection ports (as needed).The inspection ports allow for easy access Examples of culvert cleaning nozzles appropriate for Isolator Row to the system from the surface, eliminating the need to maintenance.(These are not StormTech products.) perform a confined space entry for inspection purposes. Maintenance is accomplished with the JetVac process. If upon visual inspection it is found that sediment has The JetVac process utilizes a high pressure water noz- accumulated, a stadia rod should be inserted to deter- zle to propel itself down the Isolator Row while scouring I mine the depth of sediment. When the average depth and suspending sediments. As the nozzle is retrieved, of sediment exceeds 3 inches throughout the length of the captured pollutants are flushed back into the man- the Isolator Row, clean-out should be performed. hole for vacuuming. Most sewer and pipe maintenance I companies have vacuum/JetVac combination vehicles. 2.2 MAINTENANCE Selection of an appropriate JetVac nozzle will improve The Isolator Row was designed to reduce the cost of maintenance efficiency. Fixed nozzles designed for cul- periodic maintenance. By"isolating" sediments to just verts or large diameter pipe cleaning are preferable. I one row, costs are dramatically reduced by eliminating Rear facing jets with an effective spread of at least 45" the need to clean out each row of the entire storage are best. Most JetVac reels have 400 feet of hose allow- bed. If inspection indicates the potential need for main- ing maintenance of an Isolator Row up to 50 chambers tenance, access is provided via a manhole(s) located long. The JetVac process shall only be perfor ed on I on the end(s)of the row for cleanout. If entry into the Stor Tech Isolator Rows that have AASHTO class 1 manhole is required, please follow local and OSHA rules woven geotextile (as specified by Stor Tech) over for a confined space entries. their angular base stone. I Stor Tech Isolator Row(not to scale) COVER ENTIRE ROW WITH AASHTO M288 INSPECTION PORT CLASS 2 NON-WOVEN GEOTEXTILE LOCATION PER ENGINEER'S SC-310-5'(1.5 m)WIDE STRIP DRAWING SC-740-8'(2.4 m)WIDE STRIP STORMTECH I MG3500-12.5'(3.8 m)WIDE STRIP END CAP CATC�, -- - �� ' At BASIN - - 11111111I1-jill OR MANHOLE - iPPAMIIM111... M X,.�= III= Illinir-` �AIAIAIAIAIAIAIAI�►�ifAi 'AIAIAIAIAIAIAIAIAIA�•' 17 4'f& INV il?:;1141.00100101PlifittliffliektIONIVitil�lil�lil�lil�liIVi Y ' d SUMP DEPTH " ..r...'!i.�� I BY DESIGN 11=11=11. •:-• 1=11 Ilu, ENGINEER SC -12"(300 mm)PIPE 2 LAYERS OF WOVEN GEOTEXTILE THAT MEETS AASHTO M288 CLASS 1 SC-740-24"(600 mm)PIPE REQUIREMENTS,BETWEEN STONE BASE AND CHAMBERS MC3500-24"(600 mm)PIPE SC-310-4'(1.2 m)WIDE STRIP SC-740-5'-6'(1.5 m)WIDE STRIP I - - MC-3500-8.25'(2.5 m)WIDE STRIP Call StormTech at 888.892.2694 or visit our website at www.stor tech.co for technical and product information. 3 I