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Nomellini Property - 2 - 6 June 2019
<br /> 1045WestCharter Way
<br /> Stockton, San Joaquin County
<br /> proposed boing B-25. Please submit a well installation report by 30 August 2019, and
<br /> include results of the initial groundwater monitoring event in the Third Quarter 2019
<br /> Semi-Annual Groundwater Monitoring Report due 1 November 2019.
<br /> 2. Please monitor Site wells as detailed in the table below:
<br /> Semi-Annual Annual
<br /> MW-1, MW-2, MW-3, MW-4, MW-6, MW-7, MW-5, MW-8, MW-9, MW-11, MW-13,
<br /> MW-10, MW-12, EW-1, New Wells MW-14, MW-15, VW-1, VW-2, VW-3, VW-4,
<br /> VW-5, VW-6, VW-7, VW-8, VW-9
<br /> Semi-Annual events should be performed during the first and third quarters, annual
<br /> monitoring events should be performed during the third quarter. Semi-annual
<br /> groundwater monitoring reports are due each 1 May and 1 November. The Third
<br /> Quarter 2019 Semi-Annual Monitoring Report is due 1 November 2019.
<br /> 3. In the 1Q2019 Report, AGE recommended preparation of a low threat closure policy
<br /> evaluation report (Closure Request Report). Central Valley Water Board staff does not
<br /> agree with submission of a Closure Request Report at this time. Petroleum impacts to
<br /> groundwater are not defined to the north and northwest of well MW-2 in the B zone
<br /> (wells screened between 22 and 60 feet below ground surface (ft bgs). TPH-G and
<br /> benzene are detected in down-gradient well MW-2 at 8,500 ug/L and 2,360 ug/L
<br /> respectively. Since shutdown of the DPE system, TPH-G and benzene concentrations
<br /> have generally been increasing in well MW-2, indicating the groundwater plume is not
<br /> stable or decreasing. Central Valley Water Board staff request that you definethe extent
<br /> of the release. Please continue groundwater monitoring, as requested above.
<br /> 4. By 30 June 2019, please submit the contact information for the property owner of 1145
<br /> West Charter Way, Stockton. Central Valley Water Board staff will send a letter
<br /> requesting that they allow you access to install the previously approved groundwater
<br /> monitoring wells.
<br /> If you have any questions or concerns, I may be reached at (916) 464-4792 or by email at
<br /> vera.fischer@waterboards.ca.gov.
<br /> mu,^
<br /> .l
<br /> Vera Fischer, P.G.
<br /> Engineering Geologist
<br /> cc: Technical Staff, State Water Resources Control Board, UST Cleanup Fund, Sacramento
<br /> Technical Staff, San Joaquin County Environmental Health Department, Stockton
<br /> Mr. William Little, Advanced GeoEnviron mental, Inc., Stockton
<br /> Mr. Tim Cuellar, Advanced GeoEnvironmental, Inc., Stockton
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