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California Regional Water Quality Control Board <br /> Central Valley Region <br /> Robert Schneider,Chair Gray Davis <br /> Winston H.Hickox Governor <br /> Secretaryfor Sacramento Main Office t� <br /> Environmental Internet Address: http://www.swmb.ca.gov/mgcb5 ��W ED <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-30Rrte- <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> JUN 0 7 2002 <br /> 6 June 2002 ENpERMI ITHEALTHENT <br /> ISERMCES <br /> Mr. Brian Miller <br /> Agnum <br /> 1220 Potter Drive <br /> West Lafayette, IN 47906 <br /> REVIEW OF QUARTERLY MONITORING REPORT AND PROPOSED CHANGES TO <br /> MONITORING AND REPORTING PROGRAM,WESTERN FARM SERVICE, <br /> STOCKTON, SAN JOAQUIN COUNTY <br /> We have reviewed the following documents submitted by Sierra-Pacific Group on behalf of <br /> Western Farm Service (WFS) for the former PureGro agricultural-chemical facility at 1905 North <br /> Broadway Avenue in Stockton(site): <br /> • 30 April 2002 Quarterly Monitoring Report First Quarter 2002 (Report); <br /> • 14 May 2002 Proposed Revised Monitoring and Reporting Program (Letter); and <br /> • 24 May 2002 Revised Page for First Quarter 2002 Quarterly Monitoring Report(Page). <br /> The Report discusses the groundwater monitoring activities conducted in December 2001 and <br /> March 2002 and proposes to install five additional wells to assess the downgradient extent of <br /> pollution in each of the three water bearing zones. The Letter proposes changes to Monitoring <br /> and Reporting Program(MRP)No. 96-816. Board staff has incorporated the Page into the <br /> Report. <br /> The pumping rates recorded on the monitoring well sampling information sheets often do not <br /> correspond to the length of time the well is purged(i.e.,MW-7 on 20 March 2002). WFS must <br /> ensure that sampling methods, as stated in Appendix A of the Report, are followed. The Report <br /> proposes to install five new monitoring wells,but does not propose to submit a work plan to <br /> conduct this work or include the necessary information for Board staff to approve the proposed <br /> monitoring wells. <br /> The Letter proposes to discontinue sampling from wells MW-3,MW-7,MW-8, and extraction <br /> well E-2. Board staff concurs that wells MW-8 and E-2 are redundant,but wells MW-3 and <br /> MW-9 are in locations that provide valuable upgradient and downgradient information. WFS <br /> California Environmental Protection Agency <br /> 0 Recycled Paper <br /> The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. <br /> For a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http://www.swrcb.ca.gov/mgcb5 <br />