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1' MIN SOIL <br />MfN <br />LINER FILL <br />40mi1 SMOOTH LLDPE OVERLAP s' UIN <br />GEOMEMBRANE <br />12 oz/yd2 NONWOVEN J <br />GEOTEXTILE <br />4" DIA CPe PIPE ON 2% MINIMUM <br />GRADE TO SUMP (SEE NOTE 3) <br />GEOTEXTILE <br />1' MINIMUM <br />"-LEAK DETECTION FILL <br />PROFILE REFERENCE POINT <br />LEAK DETECTION TRENCH IN PAD <br />GROUND SURFACE <br />ni <br />REMOVABLE COVER <br />36" DIA HDPE SDR 21 WITH <br />COVER OR ENGINEER APPROVED <br />EQUIVALENT (SEE NOTE 1) <br />7' MIN BURIED <br />4" DIA INLET <br />2' (SEE (NOTE 2) <br />I <br />WELDED BASE <br />1 1 MANHOLE <br />A420 A421 <br />MINIMUM DRAIN COVER FILL <br />2.5' MIN <br />SELECT <br />- STRUCTURAL <br />FILL <br />6" PIPE BACKFILL <br />4" DIA HDPE SDR 17 LEAK <br />DETECTION PIPE <br />(-B'�LEAK DETECTION TRENCH ALONG PERIMETER ACCESS <br />340 <br />3 EACH METAL PIPE BOLLARDS <br />(MINIMUM OF 4" DIA) EMBEDDED <br />IN AND FILLED WITH CONCRETE <br />LEAK DETECTION <br />TRENCH TO BE <br />36" DIA HDPE MANHOLE <br />36" MIN <br />3' <br />— <br />r-- - <br />1 <br />I I <br />SELECT <br />I I <br />` STRUCTURAL <br />/ FILL <br />S" MIN <br />DIAMETER HOLE "' •,�. _ <br />I - <br />I <br />I •I <br />1 I 4" DIA HDPE SDR 17 LEAK <br />INSERT PIPE <br />I I DETECTION PIPE, WITH WATER <br />420 I INTO MANHOLE TIGHT COUPLINGS <br />4" DIA SOLID HDPE SDR 17 <br />4" DIA CPe PIPE TYPE SP PIPE WITH WATERTIGHT <br />COUPLERS <br />4" DIA SPLIT COUPLER <br />TYPICAL CPeP TO SOLID HDPE PIPE CONNECTION <br />4" DIA SOLID HDPE SDR 17 PIPE <br />WITH WATERTIGHT COUPLERS <br />TYPICAL SOLID HDPE TO PERFORATED CPe PIPE CONNECTION <br />L------------- J <br />C C LEAK DETECTION SUMP TO MANHOLE <br />340 A341 <br />NOTES: <br />1. MANHOLE WITH LADDER ACCESS ALONG ENTIRE DEPTH OF MANHOLE. <br />2. MINIMUM STORAGE VOLUME OF 100 GALLONS BELOW 4" DIA SOLID HDPE PIPE INLET. <br />3. THE LEAK DETECTION TRENCH IS TO BE INSTALLED WITH A MINIMUM FLOWLINE SLOPE <br />OF 3%. IF 3% CANNOT BE MAINTAINED, THE CONTRACTOR MAY REDUCE THE FLOWLINE <br />SLOPE UPON APPROVAL FROM THE ENGINEER OF RECORD IN LOCALIZED AREAS ONLY. <br />THE LOCALIZED FLOWLINE SLOPE SHALL NEVER BE LESS THAN 2%. <br />-j: >! A7574J <br />z <br />�SJ�NAL�� <br />