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Human Servkm Mannar - 2 - 25 September 2018 <br /> 95 S. Sutter Seel <br /> Stockton, San Joaquin County <br /> Central Valley water BDad staff has the following comments: <br /> 1. In Me Revised HroM Plan, Weston proposes to install multi depth soil gas wens. <br /> However, the Low Threat Underground Sywmgo Tank Case Closure Polley (LTCP) <br /> requires only Mat soil gas samples be cultivated a minimum of feet below ground! <br /> surface (bgs). Thus, no substantive benefit is galled, In relafion to the LTCP, from <br /> deeper sell gas sampling. As such, Central Valley Water Board staff requests that <br /> you proceed Installing only the shallow sail gas wells at this time. If you wish to Insiall <br /> and sample the deeper sell gas wells, Caused Valley Water Board staff requests that <br /> you submit additional iustificagon by 2 November 2018. If you na longervrish to <br /> Perform deeper sampling, then no submittal is required. <br /> 2. As they appear sufficient to address Me remaining soil Me gape, Cenral Valley <br /> Water Boad staff conmere with the 5 soil manage as proposed in the Revised LM1brk <br /> Plan. <br /> 3. By W January 2019, please submit an Assessment Report each details Me <br /> completion of the scope of work discussed above and Me meatus finings. Please <br /> provide an evaluation of the soil and soil gas data as compared to criteria of Me <br /> LTCP. <br /> Upon reviewing recent Site groundwater date, Central Valley Water Baas staff he" the <br /> following additional commens: <br /> 4. Please continue to perfume routine groumNvmer sampling at Me Site an a <br /> semi annual basis during 2n° and 4a quarters, and submit Groundwater Monitoring <br /> Reporter (GMRm within 30 days of the end of each semi-annual calendar period The <br /> near GMR is due 30 January 019 for 4a quarter 2018 groundwater sampling. <br /> Additionally, please include reaMyl ten bulvl other (MTBE) on historical groundwater <br /> analytical data tables included in Me GMRa moving lowered. <br /> If you have any questions or concerns regaling comments In this letter please contact Me <br /> undersigned rt (916) 4644615 or by mrtail at elanbuMk�ffioada.ca.aov. <br /> VIC. Ms�,n °�afo,�� <br /> Alen M. Barnum, P.G. <br /> o <br /> Engineering Geologist '! w <br /> cr9<rPppgeP <br /> or: Srimm lym, State Well Resources Control Boom, Cleanup Fund, Sacramento <br /> Michael par, San Joaquin County Enamanmemal Health Depadmem, Stockton <br /> Joylyn L. Novacak, Una Filippi Trust, 578 Silver Lake Drive, Denville 94526 <br /> Rabeg Fray, Joe Fllippl Jr Trust, P.O. Brat 201014, Stockton 95201 <br /> Mlceal Grover, Weston Solutions Inc., MOO Dollars Pkwy 8280, Dallas, TX 75034 <br />