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Y1 I <br /> I i <br /> A <br /> Conclusions and Recommendations <br /> Wright recommends that the groundwater monitoring wells be monitored at quarterly intervals <br /> to meet the requirements of the PHS-EHD for underground tank petroleum releases The <br /> monitoring program will be used to track contaminants and parameters to estimate the <br /> biodegradation-activity-in-the plume area Wright has submitted a previous recommendation to <br /> PHS-EHD to review the possibility of augmenting the biodegradation process by the addition of <br /> oxygen releasing compounds to selected on site wells The addition of oxygen releasing <br /> compounds has been effective in augmenting biodegradation and should degrade remaining <br /> volatiles In our opinion, given the distribution of contaminants observed, this approach should <br /> be effective both in terms of cost and contaminant reduction <br /> Limitations <br /> This report has been prepared specifically for the Mr Ed's Muffler Site at 595 E 11th Street <br /> in Tracy, and was done according to the current State and local agency suggested guidance <br /> documents for these investigations The interpretations, conclusions and recommendations made <br /> herein are based on the data and analysis for the soil and water samples collected on-site and <br /> should be reviewed in the context of this report and other site reports Please note that reports <br /> of contamination must be submitted to the agencies in a timely manner Wright Environmental <br /> Services, Inc is not responsible for errors in laboratory analysis and reporting, nor f o r <br /> information not available during the course of the study, and no warranty or guarantee is <br /> expressed or implied therein <br />. If you have any questions concerning this report, please call Di <br /> Sincerely, '`�-�� GES` <br /> �G, 4Q�1ER Al ,o p <br /> Wright Environmental Services, Inc X51 , 0, <br /> `t W 1262 �+ <br /> ,y CERTIFIED <br /> 7t, <br /> Lynch Christopher M Palmer ENGINEERING <br /> cipal CEG 1262, HG 246 s GEOLOGIST <br /> l4� of cauF°��`P <br /> Attachments: Figure 1 Groundwater Contour Map, June 30, 1998 <br /> Groundwater Sampling Information Sheets <br /> Chemical Analytical Data and Chain-of-Custody Form <br /> Page 6 <br /> 11 —TV <br /> _ _ — -�-•� <br />