underground retention costs can be minimized with high-density plastic
cube system or polypropylene corrugated wall stormwater collection
management systems. no need to excavate 12'x12' haul-off and backfill
with pea gravel. geocube or stormtech in a shorter & shallower pit has a
greater storage volume than the equivalent length of 8' diameter cmp.

avoid ph / alkalinity tests required for cmp installations.

reduce future deterioration and replacement issues

excavate and install stormwater management system in less time than
cmp system.

visit links below to learn more:

http://www.stormtech.com/index.html

http;//www.invisiblestructures.com/RS3/rainstore.htm

http://www.funkenorthamericaltd.com/draintank.htm

http://www.stormh2osolutions.com/