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. Mr Don Rodgers Project 2613-100 03 <br /> December 3, 1998 <br /> Page 3 <br /> respectively MTBE was below laboratory detection limits using USEPA Methods 8020A <br /> Modified and 8260 The oxygenates tertiary butanol, DIPE, ETBE, and TAME were also below <br /> laboratory detection limits Results of laboratory analyses are presented in the Table 1 <br /> REMEDIATION SYSTEM STATUS: THIRD QUARTER 1998 <br /> Pinnacle designed and permitted the soil vapor extraction system The system will use a catalytic <br /> oxidizer to abate soil vapors extracted from wells VW-1 through VW-4 Construction and system <br /> installation activities will occur during the fourth quarter 1998 System start-up will occur once the <br /> approved permit to operate is recovered from the San Joaquin Valley Air Pollution Control District <br /> CONCLUSIONS <br /> Analytical results of petroleum hydrocarbons were generally consistent with previous sampling <br /> events Groundwater elevation decreased 0 23 foot from the previous sampling event(May 1998) <br />. Pinnacle will continue to perform quarterly groundwater sampling The next sampling event is <br /> scheduled for November 1998 <br /> Please call if you have questions regarding this report or any aspect of the project <br /> Sincerely, <br /> Pinnacle <br /> Mark Capps a Joh n <br /> Project Geologist mor P Ject Supervisor <br /> RG 6561 RG567 <br /> Attachments Table 1 Groundwater Monitoring Data <br /> Figure 1 Site Location Map <br /> Figure 2 Generalized Site Plan <br /> Appendix A Groundwater Monitoring Field Data Sheets <br /> Appendix B Sampling and Analysis Procedures <br /> Appendix C Chain-of-Custody Records and Laboratory Analysis Reports <br /> • <br /> SACO IQMRIR0DGERSI3RDQ981RDGRQ398 DOC-Msg 1 7->MN4d& <br /> Rev U,1213198 <br />