HUNTINGTON BEACH (AP) — Crude oil has seeped from beneath a busy street in Huntington Beach, forming a dark puddle that has halted traffic.

John Thomas, a local oil well operator assisting with the clean-up, told the Orange County Register Friday that roughly 10 barrels of oil have pooled on Goldenwest Street south of Ellis Avenue.

READ MORE: Southland Braces For Triple-Digit Temperatures

A hazardous materials specialist is monitoring the airborne chemicals produced by the oil, which appears to have seeped from a pipeline beneath the road.

READ MORE: At Least One Hurt When Car Slams Into Light Pole In Sylmar

Southbound traffic on the street was halted after the incident was reported early Friday.

Officials are investigating the cause of the seep.

MORE NEWS: California's June 15 Economic Reopening Has Many Residents Rejoicing, While Others Say They're Worried

(© Copyright 2011 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)