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• 0 <br /> California Regional Water Quality Control Board =. <br /> Central Valley Region <br /> Robert Schneider,Chair <br /> Winston H.Hickox Gray Davis <br /> Secretaryfor Sacramento Main Office Governor <br /> Environmental Internet Address: http://www.swrcb.ca.gov/—rwgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> % _ <br /> V VIA FACSIMIL <br /> i V <br /> 20 August 2003 ° l ? <br /> a,llrr, 2, 5 2003 , ���i <br /> Dave Olmstead Uic, <br /> T �I <br /> Linne Estates, LLCNI <br /> y^ <br /> 7701 Bates Road <br /> Tracy, CA 95356 <br /> CONDITIONAL APPROVAL OF BASELINE GROUNDWATER QUALITYASSESSMENT, <br /> PROPOSED LINNE ESTATES SUBDIVISION, TRACY, SAN JOA QUIN COUNTY <br /> I have reviewed the 6 August 2003 Workplan, Baseline Groundwater Quality Assessment, Proposed <br /> Linne Estates Subdivision prepared by Kleinfelder. The plan was prepared as part of preparation of a <br /> Report of Waste Discharge (RWD). Because an RWD has not been submitted, staff cannot comment on <br /> the site proposed for wastewater discharge. If upon review of the RWD, the proposed site is determined <br /> to be inadequate for some reason or additional land area is needed, additional wells may be required. In <br /> addition, the RWD must evaluate connection to the regional Tracy system as a waste disposal method. <br /> After reviewing the workplan, I have the following comments: <br /> — If conditions in the borehole allow, it is recommended that the sand pack be surged prior to installing <br /> the bentonite seal. <br /> — Section 4.2 states, "Actual well locations will be based on the final proposed PSTF and leachfield <br /> locations." As described above,based on the information presented in the RWD, additional wells <br /> may be required. <br /> — Section 4.2 describes the soil borings as 6-inch diameter. Use of a 6-inch auger will not allow <br /> adequate annular seal space. The California Well Standards,Bulletin 74-90 Part H, Section C, and <br /> the San Joaquin County Well Standards Section 13.12.2 require a minimum 2-inch thick annular <br /> seal. Please revise the size of the soil boring. <br /> — The bentonite transition seal must be hydrated prior to installation of the well grout in accordance <br /> with Bulletin 74-90 Part H, Section E and SJCWS Sections 13.11.3 and 13.11.4. Please describe <br /> how the material will be hydrated. <br /> — Section 5 describes soil sample collection and analysis but does not describe how the soil samples <br /> will be analyzed. Please describe the purpose of the soil sample collection and describe what <br /> analyses are planned. <br /> California Environmental Protection Agency <br /> C4 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 littp://www.swreb.ca.gov/rwgcb5 <br />