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• <br /> Popach Short Plat—2 Lots <br /> Table V-4-5.2(22) Maintenance Standards - Permeable Pavement <br />• (continued) <br /> Recommended Fre- Condition <br /> quency a when Main- <br /> Component tenance is Action Needed (Procedures) <br /> Inspection Routine Needed <br />• Maintenance (Standards) <br /> formance of the facility <br /> (note that small clogged <br /> areas may not reduce over- <br /> all performance of facility) <br /> . Test the surface infiltration <br /> rate using ASTM C1701 as <br /> a corrective maintenance <br /> indicator. Perform one test <br /> per installation, up to 2,500 <br /> square feet. Perform an <br /> additional test for each addi <br /> tional 2,500 square feet up <br /> clogged: Pond- to 15,000 square feet total. <br /> ing on surface Above 15,000 square feet, <br /> or water flows add one test for every <br /> off the per- 10,000 square feet. <br /> meable pave- • If the results indicate an <br /> ment surface infiltration rate of 10 inches <br /> during a rain per hour or less, then per- <br /> event (does form corrective main- <br /> not infiltrate) tenance to restore <br /> permeability. <br /> . Clogging is usually an <br /> issue in the upper 2 to 3 <br /> centimeters of aggregate. <br /> Remove the upper layer of <br /> encrusted sediment,and <br /> fines, and/or vegetation <br /> from openings and joints <br /> between the pavers by <br /> mechanical means and/or <br /> suction equipment(e.g., <br /> pure vacuum sweeper). <br /> 2014 Stormwater Management Manual for Western Washington <br /> Volume V-Chapter 4 -Page 893 <br /> WESTERN ENGINEERS,INC. 28 PROJECT:15-1463-A <br />