aquifer exemption

Greta Mart/KCBX

The US Environmental Protection Agency has approved an aquifer exemption for the Arroyo Grande oil field near San Luis Obispo. This enables Sentinel Peak Resources, the current owner of the oil field also known as Price Canyon, to move forward with a planned expansion of wells for both enhanced oil recovery and dispoal of wastewater, or "produced water."

Greta Mart/KCBX

Voters in six California counties have passed measures banning fracking and placing limits on other types of oil extraction. This November, a citizen’s initiative in San Luis Obispo County sought to do the same. Oil companies funded an $8 million dollar campaign to defeat the measure, and a majority of voters rejected Measure G—54 to 46 percent.

The defeat removes one roadblock to a planned expansion of operations at the Arroyo Grande oil field near San Luis Obispo.

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The deadline for public comment on a proposed expansion of oil drilling-related operations in San Luis Obispo County’s Price Canyon is 5 p.m. Friday.

Oil production and groundwater aquifers

Sep 6, 2017
Greta Mart/KCBX

Oil companies in California produce more water than oil. That has created a problem: what to do with all of that unwanted water? In most cases that wastewater is injected back into the ground, deep below the aquifer. But in some cases, injections may have contaminated federally protected aquifers that could be clean enough for drinking water.