CARIBBEAN HYDRO-TECH. INC. P.O. BOX 2070 • KINGSHILL • ST. CROIX • U.S.V.I. 00851-2070 (809) 778-6551 • FAX 778-5375 Clifford Crooke, Env. Specialist III March 29. 1992 Div. of Environmental Protection Dept. of Planning and Natural Resources Nisky Center, St. Thomas USVI Re: Western Auto Site Investigation-March, 1993. Dear Sir, I am submitting another*report on the continuing site investigation on the contents and location of suspected underground tanks formerly operated by the Western Auto Store located at Four Winds Plaza, #392 Anna's Retreat, St Thomas. This site investigation proceeded utilizing similar investigative methods and quality control/quality assurance as described in my letter of Nov. 28, 1992: As you recall, a sample analysis from Tank #2 near the rear of the Western Auto facility and other samples in the same batch revealed apparently high trichloroethene (TCE) levels. The anomalous analysis results did not match other sampling results obtained from the same area but from different sampling events. I resampled the tank on March 12, 1993 and had EPA analysis 601/602 performed. I am reporting those contaminants found above detectable levels. The results of the analysis were as follows: All results in micrograms/liter {parts per billion (ppb)}. Methyl Tert Butyl Ether 2 Benzene 15 Ethylbenzene 3 o-Xylene 2 No chlorinated hydrocarbons were found above detectable levels. These results conform much more closely with analysis of other aqueous and non-aqueous samples taken in and around the area. I suspect laboratory or other error caused the anomalous results. I plan on performing more sampling to verify this latest analysis. Full copies of the analysis results are available upon request. TUT OO6 .1589 *64812* 64812 In summary, I would not utilize the analysis indicating high levels of TCE for any evaluation or action at the site. Other sampling events from the same location did not indicate TCE contamination nor were there indications of associated or breakdown products normally found with TCE. Future sampling and analysis will confirm the latest analysis. As discussed in our informal meeting at Four Winds earlier this year, I will keep your office informed of all discoveries and information as it becomes available. Please contact me with any questions or comments. Sincerely, cc: J. Dema C. Kwan TUT OCA 159O