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shrinking size. The remaining dissolved contaminants in soil/aquifer are interpreted as degraded petroleum fuel and biodegradation processes are anticipated to continue t6. operate on the remaining contaminants. In our opinion, these data do not suggest a potential human health or safety issue or loss of beneficial water use. 2.10 List of technical reports. A list of the technical reports is attached (see 2.22 References). ✓ 2.20 Conclusions and Recommendations On the basis of the information presented herein, it is our opinion that the site qualifies site closure as presented in this summary closure report for NFAR. Wright recommends that the property at 99 Sixth Street in Tracy, CA should be closed at this time. 2.21 Limitations This report has been prepared specifically for the City of Tracy "Delta Disposal" Site at 99 Sixth Street in Tracy, CA, and was done according to the current State and .local agency suggested guidance documents for these investigations. The interpretations, conclusions and recommendations made herein are based on the data and analysis for the soil and water samples collected on-site. Conditions of the property can change over time and the use of this report by third parties is entirely at their own risk. The soil borings can only present information accurately on the area directly at the point of the boring. They give a general indication of the condition of the site,but will not serve as a basis for a guarantee of non-contamination of the site. The conclusions and professional opinions that will be presented are developed in accordance with generally accepted practice as outlined in the guidelines of the California Regional Water Quality Control Board and/or other agencies for soil and groundwater sampling. The chemical analysis results are based on data collected at the sampling locations only, therefore Wright Environmental Services, Inc. cannot have complete knowledge of the underlying conditions. Conditions at the project site will change with time due to natural processes or the works of man. Accordingly, the findings of this report will apply to the present conditions only; the opinions expressed therein are subject to revisions in light of new information, and no warranties are expressed or implied. Please note that reports of contamination must be submitted to the agencies in a timely manner. This report has been prepared for use solely of City of Tract, our Client. This report shall not be relied upon by or transferred to any other party, or used for any other purpose, without the' express written authorization of our Client, and City of Tracy. Wright Environmental Services, Inc. is not responsible for errors in laboratory analysis and reporting, nor unreported or unknown sources of site contamination or for information not available during the course of the study, and no warranty or guarantee is expressed or implied therein. Page 9 of 17 I I