Section 21-1824. WELL CONSTRUCTION REQUIREMENTS: GROUND FREEZE WELL

 

1824.1The American Society for Testing and Materials (ASTM) standard A-120/A-53 steel shall be used for subsurface freeze pipes, unless otherwise approved in a well construction work plan by the Department in accordance with §§ 1803.10 and 1803.11.

 

1824.2The subsurface connections of steel freeze pipes installed in a ground freeze well shall be welded.

 

1824.3A ground freeze well system shall be installed by a licensed well driller experienced in installing ground freeze well systems or trained, certified, or accredited by a recognized professional organization specializing in the installation of ground freeze well systems.

 

1824.4Flushing, purging, pressure, and flow testing of a ground freeze well and system components shall meet the following requirements:

 

(a)The loops shall be pressure tested before installation; and

 

(b)All horizontal components of the ground freeze distribution manifold shall be flushed, pressure tested, and flow tested prior to backfilling.

 

1824.5No coolant fluid or refrigerant circulated within the ground freeze downhole piping or ground freeze distribution manifold shall contain any substances that pose a hazard to public health and safety or the environment.

 

1824.6Pressure testing of the ground freeze well system shall be conducted and operating pressures shall be maintained in accordance with the manufacturer’s specifications prior to putting the system into operation.

 

 

authority

District Department of the Environment Establishment Act of 2005, effective February 15, 2006 (D.C. Law 16-51; D.C. Official Code §§ 8-151.01 et seq. (2013 Repl.)); the Water Pollution Control Act of 1984, effective March 16, 1985 (D.C. Law 5-188; D.C. Official Code §§ 8-103.01 et seq. (2013 Repl. & 2016 Supp.)) (the Water Pollution Control Act); and Mayor’s Order 2006-61, dated June 14, 2006

source

Final Rulemaking published at 63 DCR 13424 (October 28, 2016).