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LK E/NFELDER .r �enynxror..n;ynexmao,. 6. Two diesel AST's were located on the southeast border of the dairy. One was located on an above ground cradle and one was located on wooden blocks on the ground. Two mobile AST's are located south of the milk barn. There did not appear to be any leaking, staining or stressed vegetation associated with the tanks. This conclusion regarding soil staining has changed regarding the two mentioned diesel ASTs. Some staining was noted near the two diesel ASTs and soil staining was noted near a cement pad near a generator associated with one of the two ASTs. A Diesel AST in an above ground cradle was noted in the center of APN 205-100-17. Three diesel AST's in above ground cradles are located north of the milk barn. Soil staining was noted at the base of the tanks. This conclusion essentially remains the same in regards to soil staining noted in these areas. However, the diesel AST was no longer noted on APN 205- 100-17. One of the three diesel ASTs was noted as containing gasoline. i An AST of disinfectant for the cow udders was located south of the dairy cows. The AST does not appear to pose an environmental concern to the site. This conclusion remains the same. Two AST's are located in the western portion of the dairy. According to Mr. Dotinga, one tank was previously used to store molasses and one tank is a whey tank containing a corn liquid product. Based on this information, these two AST's do not appear to pose an environmental concern to the site. This conclusion remains the same. A large AST was located in the open area between the barns and sheds in the southwestern portion of the site (central farmhouse/residential area on the northern parcel]. According to Mr. Dotinga, the AST was a former diesel fuel AST. This conclusion remains the same. However, an additional poly AST was also noted in this area containing urea ammonium nitrate which was noted with a small leak. Kleinfelder recommends implementing secondary containment at all petroleum ASTs or other chemical coAtainers located at the site. Those ASTs with soil staining and even th*e without observable stains can contribute to subsurface petroleum contamination. Impacted soil should be removed and disposed of according to federal, state and local laws and regulations. If requested, Kleinfelder can assist in the evaluation of petroleum impacted soil and disposal options. This conclusion remains the same. 7. A concrete box was located in the open area between the barns and sheds in the southwestern portion of the site. According to Mr. Dotinga, the concrete pad contained a diesel AST from a previous farmer. Although no 95428.E07/STOBR693 July 29,2008 ®2008 Kleinfelder Page 20 of 26