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QUESTAR GAS COMPANY

gas_distribution Incident — PLEASANT GROVE, UT

Incident Information

Report Date—
OperatorQUESTAR GAS COMPANY
Commodity—
Pipeline Typegas_distribution

Location

CityPLEASANT GROVE
StateUT
CountyUTAH
Coordinates40.35894, -111.73885

Cause

CauseOTHER OUTSIDE FORCE DAMAGE
Subcause—

Casualties

Fatalities0
Injuries0

Costs

Property Damage—
Lost Commodity—
Public/Private Damage—
Emergency Response—
Environmental Remediation—
Other Costs—

Location Map

Incident Narrative

QUESTAR GAS EMERGENCY DISPATCH RECEIVED A CALL AT 7:47 P.M. FROM PLEASANT GROVE EMERGENCY DISPATCH REGARDING A POSSIBLE EXPLOSION LOCATED AT 85 EAST STATE STREET, IN PLEASANT GROVE, UTAH. QUESTAR PERSONNEL RESPONDED ON SITE AT APPROXIMATELY 8:00 P.M. UPON ARRIVAL, THE HOME LOCATED AT 415 SOUTH 100 EAST WAS COMPLETELY DESTROYED, AND NATURAL GAS WAS ESCAPING NEAR THE FOUNDATION OF THE HOME FROM WHERE THE GAS METER ONCE WAS. THE FORCE OF THE HOME EXPLODING CAUSED THE METER TO BE SEVERED FROM THE SERVICE LINE AND CAUSED THE UNINTENTIONAL RELEASE OF NATURAL GAS. THE GAS DID NOT IGNITE OR EXPLODE. THE METER WAS LOCATED APPROXIMATELY TEN FEET FROM THE FOUNDATION OF THE HOME. THE 3/4 INCH NIPPLE GOING INTO THE REGULATOR HAD FAILED DUE TO THE FORCE OF THE EXPLOSION. IMMEDIATELY UPON ARRIVAL QUESTAR PERSONNEL PERFORMED TESTS TO CHECK FOR GAS IN THE GROUND AROUND THE DAMAGED HOUSE AND IN THE SEWER MANHOLES. NO GAS WAS DETECTED IN THE GROUND, IN THE TELEPHONE DUCT WORK OR IN THE SEWER. QUESTAR PERSONNEL THEN BEGAN TO SECURE THE SITE AND CUT AND CAPPED THE DAMAGE SERVICE LINE. THE SERVICE LINE WAS LEAK TESTED FROM THE CUT TO THE RISER. NO LEAKS WERE DETECTED. THE REMAINDER OF THE SERVICE LINE WAS LEAK TESTED FROM THE CUT TO THE MAIN AND THEN PERMANENTLY RETIRED. NO LEAKS WERE DETECTED. ONCE THE DAMAGED SERVICE LINE WAS SECURED ADDITIONAL LEAK SURVEYS WERE CONDUCTED IN THE AREA TO ENSURE THAT THERE WAS NO LEAKING GAS IN THE GENERAL VICINITY. THE ADDITIONAL LEAK SURVEY INCLUDED ALL SURFACE STREETS, DUCTS, SEWERS, AND GAS LINE LOCATIONS WITHIN A TWO BLOCK LIMIT OF THE DAMAGED HOME. NO LEAKS WERE DISCOVERED. THE HOME WAS VACANT AT THE TIME OF THE EXPLOSION. NO INJURIES OR FATALITIES WERE REPORTED AS A RESULT OF THIS EXPLOSION. THE CAUSE OF THE EXPLOSION IS STILL UNDER INVESTIGATION AT THIS TIME BY THE PLEASANT GROVE POLICE DEPARTMENT AND UTAH STATE FIRE MARSHALL. UPDATE: BASED ON THE TESTING PERFORMED AT THE SITE, THE SOURCE OF THE LEAK IS BELIEVED TO HAVE COME FROM CUSTOMER OWNED PIPING INSIDE THE HOME.

About This Pipeline Incident

Pipeline incident data is reported to the Pipeline and Hazardous Materials Safety Administration (PHMSA). All significant incidents involving fatalities, injuries, or property damage over $50,000 must be reported.

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