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' Pombo Property Soil & Groundwater Sampling detectable for similar contaminants. This may be an indication that the lateral limits of the contamination are not extensive. ' Additional soil borings with the Geoprobe® are suggested for the areas indicated on the Figure 4 Proposed Boring Location Map. These borings will be used to determine the ' lateral limits of the soil and groundwater contamination associated with the former underground tanks. The borings will be drilled to a minimum of 20 feet bgs with soil sampling conducted below the water table to determine the vertical depth of the contaminants. Sampling protocol and Health and Safety will be followed as described in our August 3, 1998 Work Plan. Information obtained from this additional phase of work will us help determine the type of cleanup most feasible for this site. The contaminant concentrations detected in thesam roundwater les exceed the g p established regulatory limits for groundwater in the Tracy area. It is the recommendation of M.J. Kloberdanz and Associates that copies of this report should be forwarded to the San Joaquin County Department of Environmental Health and the Central Valley ' Regional Water Quality Control Board. It is the responsibility of the property owner to ensure that all proper notifications are conducted. ' The above represents our best professional opinion as to environmental conditions at this site. These opinions were derived using data at hand, and standards of care common to the environmental consulting community in Northern California. There is the possibility ' that even with proper application of the above methodologies, there may exist on the subject property conditions that could not be identified within the scope of this assessment or which were not reasonably identifiable from the available information. The methodologies included in this report are not intended to produce all inclusive or comprehensive results, but rather to provide the client with information regarding apparent suspicions of existing and potential adverse environmental conditions relating to ' the subject property. Additional work at this site may generate data that could lead to a change of opinion regarding conditions or appropriate remediation procedures or both. ?� t�,A�D G Prepared by: C Gr��iSlCIFp ROBERT HOU u'—r ccNo.1 Ea GEoLo� ' Robert Fourt, CHG �plr G California Certified Hydrogeologist # 180 ' Michael J. KIoberdanz, REA, RENS California Registered Environ al Assessor#02157 California Registered Envi nmental Health Specialist #4783 ' flow G 3a 4°p A�'!'opCA USO}��!