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CITY OF SANTA ANA <br />Planning and Building Agency <br />CANYON SUBDRAIN DETAIL <br />\\ NATURAL GROUND <br />_ -�__- ---- _______ - _____ - <br />- COMPACTED FILL - - - -- - <br />BENCHING =1------------------- ---- <br />_____________ _- - <br />Approved <br />FOR PERMIT ISSUANCE <br />,zlz <br />EW04� <br />REMOVE <br />UNSUITABLE <br />MATERIAL <br />SUBDRAIN TRENCH <br />-TI=III- SEE ALTERNATES A&B <br />ALTERNATE A-1 4" kN. <br />PERFORATED PIPE <br />6" 0 MIN. <br />SUBDRAIN 1 1 /2" <br />ALTERNATE B: FILTER <br />8" <br />ALTERNATE B-1 <br />FILTER MATERIAL: <br />FILTER MATERIAL SHALL BE CLASS <br />2 PERMEABLE MATERIAL PER <br />STATE OF CALIFORNIA STANDARD <br />SPECIFICATIONS, OR APPROVED <br />ALTERNATE. CLASS 2 GRADING AS <br />FOLLOWS: <br />SIEVE SIZE <br />1" <br />3/4" <br />3/8" <br />ALTERNATE A-2 NO. 4 <br />GRAVEL WRAPPED IN <br />FABRIC <br />MIN. OVE <br />IIRAFI 140 <br />ILTER FABF <br />IR APPROVI <br />QUIVALENT <br />1/2" MIN. <br />GRAVEL OR <br />APPROVED <br />EQUIVALENT <br />9 FT. 3/FT. <br />NO. 8 <br />NO. 30 <br />NO. 50 <br />NO. 200 <br />NOTE: <br />PERCENT PASSING <br />100 <br />90-100 <br />40-100 <br />25-40 <br />18-33 <br />5-15 <br />0-7 <br />0-3 <br />IN ADDITION TO THE WRAPPED <br />GRAVEL, OUTLET PORTION OF THE <br />SUBDRAIN SHOULD BE EQUIPPED WITH <br />A MINIMUM OF 10 FEET LONG <br />PERFORATED PIPE CONNECTED TO A <br />NONPERFORATED PIPE HAVING A <br />MINIMUM OF 5 FEET IN LENGTH INSIDE <br />THE WRAPPED GRAVEL. <br />ALTERNATE B-2 <br />' SUBDRAIN INSTALLATION — SUBDRAIN PIPE SHALL BE INSTALLED WITH PERFORATIONS DOWN OR AT <br />LOCATIONS DESIGNATED BY THE GEOTECHNICAL CONSULTANT, SHALL BE NONPERFORATED PIPE. <br />• SUBDRAIN TYPE — SUBDRAIN TYPE SHALL BE ASTM D2751, SDR 23.5 OR ASTM D1527, SCHEDULE 40 <br />ACRYLONITRILE BUTADIENE STYRENE (ABS) OR ASTM D3034 SDR 23.5 OR ASTM D1785, SCHEDULE 40 <br />POLYVINAL CHLORIDE PLASTIC (PVC) PIPE OR APPROVED EQUIVALENT. <br />NOT TO SCALE <br />