On Tuesday state lawmakers heard from industry and regulators about other processes - not just tracking - used to get at the oil that is tough to get out. Enhanced oil recovery techniques - of which hydraulic fracturing is just one type - have thus far not been tracked or regulated specifically.
Acid jobs are similar to the idea of hydraulic fracturing in that they inject, at high pressure fluids deep underground with the intention of breaking the rock to release oil and gas. But with Acid jobs, Hydroflouric Acid is used to "melt" the rock.
Stay tuned as lawmakers at the state and local levels scramble to get up to speed on what the industry has been doing for years. Are voters wondering why only now are lawmakers and regulators taking notice?
Here's a reuters piece on the hearings: http://news.yahoo.com/california-senators-want-more-information-oil-well-acid-033629980.html
To see Senator Fran Pavley's letter that prompted this hearing see the previous post on this site.