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• Urt.NVIRONMENTAL.INC. <br /> February 24, 2012 <br /> Page 3 of 3 <br /> 1 chain of custody and stored in a sealed cooler with sufficient ice to maintain a temperature of <br /> 40Celsius. The samples will be shipped to the laboratory for analysis of volatile organic <br /> compounds (VOCs, including 1,2-DCP) by EPA Method 8260B, 1,2,3-TCP by SRL 524M-TCP, <br /> ' TON and ammonium-N by SM-4500, fumigants (DBCP/EDB) by EPA Method 504.1, total and <br /> dissolved iron and metals, including manganese, by EPA methods 200.7 and 200.8, ferrous and <br /> ' ferric iron by EPA method 6020 of SM350-FE, hexavalent chromium by EPA method 218.6 or <br /> SW7196A, total phosphorous by EPA method 200.7 or SM4500-P, and sulfate by EPA method <br /> 300.0 or ASTM D516-02. <br /> tDecontamination and IDW <br /> ' Down-hole drilling equipment will be decontaminated prior to use at the site and between each <br /> boring by steam cleaning or washing with laboratory-grade detergent. The cuttings generated <br /> during well installation and abandonment will be placed in containers that will be labeled, dated, <br /> ' covered and staged on site prior to disposal at an appropriate off-site facility pending laboratory <br /> analysis. Water from equipment decontamination, well development and purging will also be <br /> placed in labeled DOT drums and staged at the site pending analysis and offsite disposal. <br /> ' If you have any questions regarding the information provided, or require additional information, <br /> please contact Todd Leonard at (775) 622-0857 or tleonard(@-rubikenvironmental.com. <br /> Sincerely, ryvONAI GFO`O <br /> RUBIK ENVIRONMENTAL, INC. ¢ ppyDtiEyANS N <br /> 0 ido.eek <br /> 9�FOp CpL�FOQ <br /> Todd Leonard Dave A. Evans, PG <br /> ' Senior Scientist Senior Geologist, CA-PG 8623 <br /> CC: <br /> ' Mr. Michael Infurna, San Joaquin County Environmental Health Department, Stockton <br /> Mr. Brian Duggan, CPS <br /> Mr. Joseph Kellmeyer, Thomson Coburn LLP <br /> Attachments <br /> Appendix A MW-2 Well Log <br /> ' Revised Figures <br /> Figure 1 Site Plan with Proposed Monitoring Well Locations (Revised) <br /> tFigure 2 CPS Stockton Paired Monitoring Well Design (Revised) <br />