SITE INFORMATION AND CORRESPONDENCE

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SGO Chlor Spot, -Inc, July 22, 1493 Mr. I ovin Adazns 'age However,, the data. obtained from 17 additional soil samples. collected and chemically analyzed in the vicinityof the farmer UST over the past 4 years, utilizing detections limits substantially lower ithan file applied action level Drinking Water Starydartl (DWS) for benzene, .. indicate:that no benzene concentration.has been detected. No benzene concentration in excess iof the OWS has been detected h the soils in the vicinity of the :former UST. For additional information pertaining to these additional soil samples and additional assessment conducted.at the site, Please refer to the following environmental assessment/remediation projects performed at the site. _ • Soil Vapor.Survey Assessment conducted August 15, 1989; • Rtmediatidn of Diesel Fuel Contaminated Soil conducted.lanuaryl 19 0; and: Supplemental Site Assessment conducted October, In addition, in our March_1989 report,;we stated that the additional contaminants which were detected at the site (toluene, ethylbenzene and xylenes) were "widespread." This statement was made without the benefit:of the subsequent chemical analysis of soil samples collected following the excavation of additional soils in the vicinity of the former UST Based on SGD`s field observations and the results of the chemical analysis of the verification sail samples collected, it is clear that (a) all contaminated soil associated with the UST has apparently been removed and disposed of, (b)the detected fuel constituents(which did not include benzene) were limited in extent and were apparently caused by overfilling of the UST, not leaking of the UST; and (c) the soils remaining in the wails and flour of the resultant UST excavation following soils- remediation activities are free of actionable concentrations of fuel contaminants. Therefore, it is our professional opinion that the following can be concluded Concentrations of benzene have not been detected in the soils surrounding and adjacent to the former UST; The soil contamination which was observed daring the time of the UST = removal and required remediation has beery excavated and disposed pf; and: The U-ST has not: contributed to the regional benzene contaminated ground water problem which exists in the area.