THIS REFERRAL STEMS FROM VIOLATIONS BY CRC OF THE TERMS OF AN ADMINISTRATIVE ORDER ON CONSENT(AOC) DATED MARCH 8, 1989 AND SIGNED BY CRC AND THE EPA. CRC FAILED TO ENSURE THAT AOC QUALITY ASSURANCE REQUIREMENTS WERE MET IN THE ANALYSIS OF GROUND WATER, SURFACE WATER, SOIL AND SEDIMENT SAMPLES RELATING TO ITS OIL REFINIERY LOCATED IN COMMERCE CITY.