Problems/Comments

Four areas of concern: (1) Behind the Tribal Community Center, Old School; (2) Area around the old generator building; (3) Area around and down slope of the two 1,100-gallon and two 4,500-gallon generator fuel tanks; and (4) Area along the old generator tank refueling line. Total Petroleum Hydrocarbon concentrations ranged from 160 parts per million (ppm) to 1,320 ppm. Drinking water source is surface water from a stream one mile upriver from the village. Construction of the project is not to be delayed on behalf of ADEC. A review of the Environmental Assessment for the Proposed Tatitlek Dock & Equipment Facilities site demonstrated that the contamination discovered in the right of way was all below the ADEC cleanup levels. However, there were adjacent areas, not in the right of way, that contained contamination above ADEC cleanup levels. These areas are related to tanks and piping operated by the Tatitlek Village IRA Council. The site name was changed to reflect this. 1/28/2016 Update: Three separate contaminated areas were sampled by Nortech Environmental and Engineering Consultants in August 2006. DRO concentrations exceeded ADEC Method 2 soil cleanup levels at each location, and exceeded the Ingestion, Inhalation, and Maximum Allowable concentrations in one of those three locations. RRO exceeded the ADEC Ingestion soil cleanup level at one of the three locations. Soil sample ID TE06-01-05; 89,600mg/kg DRO; Lat 60.863170 Long -146.679371 Soil sample ID TE06-02-08; 5,090mg/kg DRO; 12,300mg/kg RRO; 60.865125 -146.681308 Soil sample ID TE06-04-02; 2,110mg/kg DRO; 60.863946 -146.679530 1/20/2019- Update The last assessment work reported to ADEC is the August 28, 2006 Preliminary Site Characterization Report, Diesel Contamination Site Assessment Project report. This report was prepared by Nortech Environmental Engineering & Industrial Hygiene Consultants, for Tatitlek Environmental. Nortech identified three (3) separate locations which were contaminated with diesel fuel and/or lubricating oil in August 2006. Diesel range organics (DRO) concentrations exceeded ADEC Method 2 soil cleanup levels at each location, and exceeded the Ingestion, Inhalation, and Maximum Allowable concentrations in one of those three locations. Residual Range Organics (RRO) exceeded the ADEC Ingestion soil cleanup level at one of the three locations. The soil sample numbers, contaminant concentrations, and the approximate latitude / longitude coordinates of these three locations are provided as follows: Soil sample ID TE06-01-05; 89,600mg/kg DRO; Lat 60.863170 Long -146.679371 Soil sample ID TE06-02-08; 5,090mg/kg DRO; 12,300mg/kg RRO; Lat 60.865125 Long -146.681308 Soil sample ID TE06-04-02; 2,110mg/kg DRO; Lat 60.863946 Long -146.679530

Action Information

Contaminant Information

Control Type

Requirements

No associated sites were found.