Laserfiche WebLink
S E C ® R <br /> Ms. Lori Duncan <br /> May 12, 2006 <br /> Page 4 <br /> ARCO's historical SVE data and recent AS system operational data are provided in detail in <br /> Attachment D. Remedial system well locations are included on Figure 5. <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> The groundwater hydraulic gradient and groundwater concentrations reported during 1Q06 <br /> are consistent with historical data. SECOR recommends continued monitoring and <br /> sampling during the second quarter of 2006. <br /> STATEMENT OF LIMITATIONS <br /> This report presents our understanding of existing conditions at the subject site. The <br /> conclusions contained herein are based on the analytical results, and professional <br /> judgment in accordance with current standards of professional practice; no other warranty <br /> is expressed or implied. SECOR assumes no responsibility for exploratory borings or data <br /> reported by other consultants or contractors. <br /> Should you have questions or concerns regarding these activities, please feel free to <br /> contact Brian Carey at 916-861-0400, ext. 241. x\0NAL 0 o <br /> Sincerely, 4. <br /> SECOR International Incorporated BFNAN R CAREY <br /> qr <br /> QQ�' <br /> Laura Heberle Brian Carey, P.G. OR C A1-�F <br /> Staff Geologist Associate Geologist <br /> Enclosures: <br /> Figure 1 - Site Location Map <br /> Figure 2 - Groundwater Elevation Contour Map — March 20, 2006 <br /> Figure 3 - Groundwater Concentration Map — March 20, 21 and 22, 2006 <br /> Figure 4 - Detailed Site Plan Chevron Station 9-4275 <br /> Figure 5 - Detailed Site Plan ARCO Station 2133 <br /> Table 1 - Groundwater Elevation and Analytical Data (Chevron) <br /> Table 2 - Groundwater Elevation and Analytical Data (ARCO) <br /> Table 3 - Groundwater Analytical Data - Oxygenate Compounds (Chevron) <br /> Table 4 - Groundwater Analytical Data - Oxygenate Compounds (ARCO) <br /> Table 5 - Historical Groundwater Gradient Data <br /> 1AChevron1942751REP0RTSIQ M R120M1Q06.doc <br />