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Wnght Environmental Services,tnc <br /> It is Wright's opinion that the definition for subsurface assessment for the B-aquifer is <br /> complete No further aquifer subsurface mapping is recommended at this time <br /> 1,2-DCA was present down gradient of the site in the A-aquifer and TPHG in the B-aquifer <br /> down gradient of the site at CPT-04 and CPT-05 1,2-DCA appears to anse from an on-site <br /> source and an off-site source as seen in data from CPT-03 Some additional off-site definition <br /> might be warranted, however it is Wright's opinion that the Client should not be responsible for <br /> a contnbuting up gradient off-site TPHG and 1,2-DCA source <br /> Wright proposes that any additional off-site definition be delayed until the new monitoring wells <br /> have been installed and two quarters of data are collected and interpreted for the site plume <br /> Upon completion of that monitoring and data interpretation Wright will discuss with SJC PHD <br /> the need for additional A-aquifer definition <br /> 90 Limitations <br /> This report has been prepared specifically for the Trust of Mary Gardella and the Former <br /> Stefano's Gasoline Site on behalf of Estate of Joe Gardella (owner) at 1419 East Charter Way <br /> In Stockton, California and was done according to the current State and local agency <br /> suggested guidance documents for these investigations The interpretations, conclusions and <br /> • recommendations made herein are based on the data and analysis for the soil and water <br /> samples collected on-site, or other on-site reports and should be reviewed in the context of this <br /> report and other consultant site reports Conditions of the property can change over time and <br /> the use of this report by third parties is entirely at their own nsk Please note that reports of <br /> contammation must be submitted to the appropriate agencies in a timely manner Wnght <br /> Environmental Services, Inc is not responsible for errors either in laboratory analysts, and, or <br /> reporting, nor for information not available or other consultant reports, nor unreported or <br /> unknown sources of site contamination during the course of the study, and no warranty or <br /> guarantee of any kind is expressed or implied herein <br /> r� <br /> Stefano s—CPT Report <br /> Page 9 of 11 <br />