. Agri-news. Agriculture. July 3, 2000 Protecting your well from contamination Ground water contamination: how docs it happen and what can von do about it? Often the biggest contamination threats on a farm are things that you walk past or trip over every day without even giving them a second thought. "Ground water quality is normally protected by natural ; says Ken Williamson, agricultural water specialist with Alberta Agriculture. Food and Rural Development, Red Deer. "The topsoil and subsoil filter out many contaminants as the water on the ground surface soaks into t
. Agri-news. Agriculture. July 3, 2000 Protecting your well from contamination Ground water contamination: how docs it happen and what can von do about it? Often the biggest contamination threats on a farm are things that you walk past or trip over every day without even giving them a second thought. "Ground water quality is normally protected by natural ; says Ken Williamson, agricultural water specialist with Alberta Agriculture. Food and Rural Development, Red Deer. "The topsoil and subsoil filter out many contaminants as the water on the ground surface soaks into the ground to recharge the groundwater. Any time this process is short- circuited you have an increased potential for ; Common routes to the contamination of ground water: Poor well construction • The fastest way to contaminate ground water is to drill a poor quality well. • A poor surface casing or formation seal can allow surface water to seep along the outside of the casing and into the producing zone of the well. • Multi-aquifer well completion allows mixing of water from different aquifers. • The best protection here is to hire a qualified, conscientious driller. Old abandoned water wells • Old wells with poor construction or rusted-out casing can contaminate good wells. Old wells need to be properly decommissioned by plugging from bottom to top with bentonite or cement grout. This is usually best done by licenced water well driller. Pump pits • Can provide a funnel for contaminated surface water or shallow ground water to enter a well and contaminate ground water in the area. • Spring is a particularly bad time for flooding well pits to allow contaminated surface water to get into a well Well pits should be replaced with pitless adaptors, or at least have a sanitary well seal installed. Well pits were outlawed in the Environmental Protection and Enhancement Act (1993), but many old pits still exist. Farm water hydrants installed in a well o
Size: 3295px × 758px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcollectiontoronto, bookleafnumber173, booksubjectagriculture
