A typical septic drain field (see Figure 1), also known as a leach field, is a series of perforated pipes that are set in trenches and buried with aggregates (Â½- to 2Â½-inch gravel or Â½- to 4-inch rubber chips) and soil.These drain lines are at a minimum depth of 6 inches and are typically 18 to 36 inches wide.The individual drain lines will usually be 8Â½ to 10 feet apart (see Figure 2). It is important to note here that each drain field system will vary from the next.hese drain lines are at a minimum depth of 6 inches and are typically 18 to 36 inches wide. The individual drain lines will usually be 8Â½ to 10 feet apart (see Figure 2). It is important to note here that each drain field system will vary from the next.
Conroe, Texas, a northern Houston suburb, was the fastest-growing of the 15, seeing a 7.8% increase from 2015 to 2016, a growth rate more than 11 times that of the nation.The rest of the top five fastest-growing large cities were Frisco, Texas, a northern Dallas suburb, with a 6.2% increase; McKinney, Texas, another northern Dallas suburb, saw a 5.9% increase; Greenville, S.C., ran up a 5.8% increase; and Georgetown, Texas, a northern Austin suburb, had a 5.5% increase.
Also, the region as a whole has witnessed some of the highest population growth in the United States, and according to the US Census Bureau, in 2008â2009, Utah was the fastest growing state in America. As of the 2010 Census, Nevada was the