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' a Californi*egional Water Quality Cool Board a Central Valley Region <br /> Karl E.Longley,ScD,P.E.,Chair <br /> Linda Adams Sacramento Main Office Arnold <br /> secretaryfor 11020 Sun Center Drive 4200,Rancho Cordova,California 95670-6114 Schwarzenegger <br /> Emironmental Phone(916)464-3291•FAX(916)4644645 Governor <br /> Protection hap://www.waterbouds.ca.gov/"ntralvalley <br /> ' 10 April 2007 <br /> ' Cary Keaten <br /> City of Lathrop <br /> 390 Towne Centre Drive <br /> Lathrop, CA 95330 <br /> ' INCOMPLETE REPORT, MASTER GROUNDWATER WELL INSTALLATION AND/OR <br /> DESTRUCTION WORKPLAN, WDRs ORDER NO. R5-2006-0094, CITY OF LATHROP, <br /> SAN JOAQUIN COUNTY <br /> ' I have reviewed the 14 February 2006 Master Groundwater Well Installation and/or <br /> Destruction Workplan (Master Workplan) prepared by Hydrofocus, Inc. The report was <br /> ' required by Waste Discharge Requirements (WDRs) Order No. R5-2006-0094, Provision <br /> GA.i.i. The Master Workplan will provide the basis for future groundwater well construction <br /> ' and destruction activities and is intended to describe standard procedures to streamline <br /> future project reviews. Individual projects will be described in Groundwater Well Project <br /> Description Addendums (Addendums) required by WDRs Provision GA.i.ii, which will refer to <br /> the Master Workplan. The Master Workplan has been determined to be incomplete as <br /> described below. Please submit a revised report by 15 June 2007. In addition, the Master <br /> Workplan includes individual reports on "lost'wells. Those wells are part of the formal <br /> ' groundwater monitoring network and must be replaced as described below. <br /> In general, the workplan does not clearly describe procedures to be followed when <br /> ' constructing or destroying wells but unnecessarily specifies consultants, materials, or <br /> equipment. Such an approach in the Master Workplan will result in approval of only those <br /> Addendums that are consistent with what has been approved in the Master Workplan. To <br /> ' the extent possible, the Master Workplan should describe the procedures and materials but <br /> allow for substitution of materials or consultants as may be required in the future. Standard <br /> operating procedures may provide a more flexible approach to describe the work for future <br /> ' reference. <br /> ' Please resubmit the Master Workplan and include the following changes andlor revise the <br /> workplan as required: <br /> ' 1. The report is not organized in an outline format to allow easy reference for both this <br /> review and for future Addendums. Please reformat the workplan in numbered outline <br /> format to allow easy reference to relevant sections for preparation of Addendums. <br /> ' 2. Except as required, remove references to specific products and/or consultants. For <br /> example, specifying only 10-inch diameter hollow stem auger equipped drilling rigs will <br /> ' California Environmental Protection Agency <br /> 0 Recycled Paper <br />