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. EON No G. BROWN JR. ca uroRHu MerrHew RonRiouez rl Water Boards Central Valley Regional Water Quality Control Board E 3 � CEOVE® 9 August 2012 AUG fl 4 2012 Mr. Kevin Werner, City Engineer City of Ripon ENVIRONAgENTgLH 259 North Wilma Avenue PERAMIT/SERVICES Ripon, CA 95366-3028 STATUS OF CRW MONITORING WELLS NEAR MUNICIPAL WELL W-12, RIPON, SAN JOAQUIN COUNTY In June 2008, the City of Ripon installed 5 shallow monitoring wells and 2 deep monitoring wells between municipal supply well W-12, and Ripon Farm Service at 928 Frontage Road. Three of these wells, identified as CRW-2, CRW-3, and CRW-4 are ontipon Farm Service property. On 13 June 2012, Mr. Paul Lambert, an owner of Ripon Farm Service property, notified California Regional Water Quality Control Board, Central Valley Region (Central Valley Water Board) staff that they would be willing to take responsibility of these 3 monitoring wells (CRW-2, CRW-3, and CRW-4), including maintenance, monitoring, and eventual destruction thereof. This letter is intended to summarize our agreements regarding the transfer of the wells and our request to delay W-12 operations until remediation commences at Ripon Farm Service. On 21 June 2012, in a telephone discussion with Central Valley Water Board staff, you agreed that Ripon Farm Service may take responsibility for these three wells, if Ripon Farm Service will provide the City of Ripon with a statement to that effect. The City of Ripon respectfully requests that an agreement be made to allow the City of Ripon occasional access to the wells for monitoring. The City of Ripon will retain responsibility for the remaining wells (CRW-1, CRW- 1 D, CRW-2, and CRW-2D), and can provide Ripon Farm Service with access to these wells for monitoring. The City of Ripon intends to use these wells for the purpose of monitoring the effects of reconfiguring W-12, and providing water from W-12 into the City of Ripon's non- potable distribution system. In our 21 June discussion, we agreed that it would benefit the City of Ripon, Ripon Farm Service, and the State of California if the City of Ripon did not start delivering water from W-12 to the non-potable system until Ripon Farm Service begins its proposed groundwater remediation pilot project. It is anticipated that this could occur as early as September 2012. Central Valley Water Board staff appreciate the continuing communication between City and State. Please provide Central Valley Water Board staff with periodic transmittals of tabulated data from CRW-1, -1 D, -2, and -2D wells. If you have any questions, please contact me by telephone at (916) 4664-4680 or by email at aterrell@waterboards.ca.gov. JA B1Y TI-R RAEL! Private Sites Cleanup Unit Distribution List attached KARL E. LONGLEY SOD, P.E., CHAIR I PAMELA C. CREEDON P.E., BCEE, EXECUTIVE OFFICER 11020 Sun Center Drive#200,Rancho Cordova,CA 95070 1 WWW Waterboarde.ca.gov/contralvalley ' I Ca necrcLen r"ren