Laserfiche WebLink
C A M B R I A <br /> • Well S-4 contained a DIPE concentration of 7 73 ppb and a 1,2-DCA concentration <br /> of 8 06 ppb <br /> Quarterly Sampling <br /> Groundwater samples from wells S-1 through S-4 were analyzed for total purgeable <br /> hydrocarbons as gasoline (TPHg) by EPA Method 8015 (Modified) and benzene, toluene, <br /> ethylbenzene, xylenes (BTEX) and MTBE by EPA Method 8020 Groundwater samples <br /> collected from well S-4 were also analyzed for fuel oxygenates and lead scavengers by EPA <br /> Method 8260A <br /> Chemical analytical data are presented in a summary table in Blaine's groundwater <br /> monitoring report (Appendix A) Additional groundwater analytical data are presented on <br /> Table 1 <br /> Conclusions and Recommendations <br /> Petroleum hydrocarbons and MTBE were not detected in wells S-2 and S-4 this quarter, and <br /> petroleum hydrocarbon concentrations in well S-1 are generally consistent with historical <br /> data for this well <br /> Since DIPE and 1,2-DCA were detected again in well S-4 this quarter, we recommend <br /> continuing EPA 8260 analysis for fuel oxygenates and lead scavengers in well S-4 Quarterly <br /> sampling and monitoring at this site will continue on the established schedule <br /> If you have any questions regarding the contents of this document, please call Joe Neely at <br /> 707-933-2361 <br /> Sincerely, <br /> Cam is nvironmental Technology, Inc <br /> Lisa Summers RED GEO <br /> Staff Scientist e" W �O <br /> Joe W Neely, RG • No 6927 • <br /> Senior Project Geologist <br /> RG 6927 y 0F0 ��- <br /> 0797 2 <br /> I <br />