Chapter 5.30 USE OF SAND FILTER SYSTEM/MOUND SYSTEM ON SITES WITH 12 INCHES TO 18 INCHES OF SUITABLE SOIL, USE OF BOOT WITH SAND FILTER LINER This chapter is included in your selections. Sections: 5.30.010 Sand filter system – Purpose. 5.30.020 Sand filter liner – Purpose. 5.30.030 Sand filter liner – Standards.