Publication Summary

Soil gas, soil, and water samples were collected in the spring of 1993 in the vicinity of Lincoln Apartments, Port Angeles, as part of a leaking underground storage tank system investigation. The most likely source of the fuel contamination appears to be Round-the-Clock Deli, located about 200 feet southwest of the apartments. A total of 20 soil gas samples, six soil samples and two water samples were collected and tested. Soil gas samples were analyzed in the field using a portable gas chromatograph.

Soil gas, soil, and water samples were collected in the spring of 1993 in the vicinity of Lincoln Apartments, Port Angeles, Washington, as part of a leaking underground storage tank system investigation. The most likely source of the fuel contamination appears to be Round-the-Clock Deli, located about 200 feet southwest of the apartments. A total of 20 soil gas samples, six soil samples and two water samples were collected and tested. Soil gas samples were analyzed in the field using a portable gas chromatograph.

Potential source areas of petroleum contamination were identified at two locations. Total petroleum hydrocarbons (as gasoline, WTPH-G) were detected at 4.6 mg/kg in a soil sample near the gas tank at Round-the-Clock Deli. This is below the cleanup standards as established by the Model Toxics Control Act Regulations, WAC 173 340.

Primary gasoline compounds (benzene, toluene, ethylbenzene, and xylenes (BTEX)), were identified at other soil gas stations in the study area but at low concentrations (generally less than 1 ppm). BTEX concentrations exceeded ground water cleanup standards as defined by the Model Toxics Control Act. Based on all of the sample results it appears that Round-the-Clock Deli is one of two potential sources for the petroleum contamination beneath Lincoln Apartments. The Arco station is a second possible source area.