7805 40TH AVE W 2022-05-12 - Laserfiche WebLink

�-� ISOLATOR ROW INSPECTION/MAINTENANCE INSPECTION l The frequency of inspection and maintenance varies by location.A routine inspection schedule needs to be established for each individual location based upon site specific variables.The type of land use(i.e. = , industrial,commercial, residential),anticipated pollutant load,percent imperviousness, climate,etc.all play a critical role in determining the actual frequency of inspection and maintenance practices. At a minimum,StormTech recommends annual inspections. 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 upon previous observation of sediment deposition. The Isolator Row incorporates a combination of standard manhole(s)and strategically located inspection ports (as needed).The inspection ports allow for easy access to the system from the surface,eliminating the need to perform a confined space entry for inspection purposes. If upon visual inspection it is found that sediment has accumulated,a stadia rod should be inserted to determine the depth of sediment.When the average depth of sediment exceeds 3 inches throughout the length of the Isolator Row,clean-out should be performed. MAINTENANCE The Isolator Row was designed to reduce the cost of periodic maintenance. By"isolating"sediments to just one row,costs are dramatically reduced by eliminating the need to clean out each row of the entire storage bed. If inspection indicates the potential need for maintenance,access is provided via a manhole(s)located on the end(s)of the row for cleanout. If entry into the manhole is required, please follow local and OSHA rules for a confined space entries. Maintenance is accomplished with the JetVac process.The JetVac process utilizes a high pressure water nozzle to propel itself down the Isolator Row while scouring and suspending sediments.As the nozzle is retrieved,the captured pollutants are flushed back into the manhole for vacuuming.Most sewer and pipe maintenance companies have vacuum/JetVac combination vehicles.Selection of an appropriate JetVac nozzle will improve maintenance efficiency. Fixed nozzles designed for culverts or large diameter pipe cleaning are preferable. Rear facing jets with an effective spread of at least 45"are best. Most JetVac reels have 400 feet of hose allowing maintenance of an Isolator Row up to 50 chambers long.The JetVac process shall only be performed on StormTech Isolator Rows that have AASHTO class 1 woven geotextile(as specified by StormTech)over their angular base stone. StormTech Isolator Row(not to scale) Note:Non-woven fabric is only required over the inlet pipe connection into the end cap for SC-160LP,DC-780,MC-3500 and MC-4500 chamber models and is not required over the entire Isolator Row. OPTIONAL INSPECTION PORT SC-TAO,SC-310:COVER ENTIRE ISOLATOR ROW WITH ADS uiiiiiii iuiiiii iii ////ZIZIA .i�11� .nef GEOSYNTHETICS BOIT NON-WOVEN GEOTEXT0.E �/:1:'.•-.::.u^,.::.: TIC: ""/,�,Y / /Illll� lll�r,,:•,/•••. 7••y SC-T3R d(2.A m)MIN WIDEi5^•�} lT,� .y(�f_`< SC310:5(1S m)MIN WIDE Jf f C i f. >' f� k MGd500,MC-35PT,OC-TIO.SG1BOlP:COVER PPE 1 f" {• 1 f. f\+ f�f I. i,,,�f�'S A •-, T� STORMTECH CHAMBER CO NECTIONTOENOCAPWRHAOS f _ lI GEOSYNTHETNS 601T NONWOVEN GEOTEDTLE -I �^ • - r STORMTECH ENO CAP ZTO ,i CATCH BASIN I L ., -I' I l 1 /1 I_ 1, I 1�I llrll' GR � (� I 1 1 '1- \ Y 1I]`11 I] IJ`11 `r1 1I, , 1 ]iI ]]I ]1 I7 J MANHO E IIiliI Il�li ' ; 4 ; 7!\I\�iI■�iti�il�� IILI��I ,1 SUMP DEPHTBD BY k �.sv-1i.3 f � C SITE DESIGN ENGINEER (21'(800 Al,,]NN RECOMMENDED) TWO LAYERS OF ADS GEC/SYNTHETICS 315WT WOVEN GEOTEXTBE BETWEEN FOUNDATION STONE AND CHAMBERS,CONTINUOUS FABRIC WITHOUT SEAMS 24.(600 mm)HDPE ACCESS PIPE REQUNED:MO-500.MC-3500.SC-TRO.DD-TB0 la 3'(11 m)AIN WIDE.MC-I500 12'(300 mm)HOPE ACCESS PPE REQUIRED:SC310 8.25(25 m)MN WIDE Mc-moo B'(200 mm)HOPE ACCESS PIPE REQUIRED:SC.160LP 5(1.5 m)MIN WIDE DC-TBO.SC-M0 4'(1.2 m)NIN WIDE SC-310,SC-160LP ... _... ". +lFla.4c ..1 �� to