WESTGATE MOBILE HOME PARK, LOCATED IN ONTARIO, OREGON IS OWNED BY ROBERT AND DENISE COOK. THE DRINKING WATER THE COOKS SUPPLY AT THE PARK HAS REPEATEDLY BEEN FOUND TO EXCEED MAXIMUM CONTAMINANT LEVELS FOR NITRATES. THIS NITRATE CONTAMINATION CREATES A POTENTIAL HEALTH RISK TO SMALL CHILDREN AT THE PARK. NEVERTHELESS, THE COOKS HAVE FAILED TO NOTIFY THE WESTGATE USERS OF THE PROBLEM OR ITS POSSIBLE HAZARDS. THEY HAVE ALSO FAILED TO SAMPLE THEIR WATER AND REPORT ANALYTICAL RESULTS TO EPA. THESE VIOLATIONS HAVE CONTINUED DESPITE A NUMBER OF EPA CONTACTS WITH THE COOKS, MADE IN AN ATTEMPT TO OBTAIN COMPLIANCE INFORMALLY.