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Public Works - 4 - 27 July 2016 <br /> 1810 Hazelton Avenue <br /> Stockton, San Joaquin County <br /> • By 30 September 2016, please submit a Work Plan which includes: <br /> o A proposal for the collection of an adequate number of groundwater samples to <br /> delineate the horizontal and vertical extent of groundwater impact from the <br /> unauthorized release of petroleum hydrocarbons from the Public Works property. <br /> o A proposal for additional downgradient monitoring wells for transition and <br /> compliance zone monitoring related to proposed ozone injection. <br /> o A proposal to collect an adequate number of soil samples from the surface to 10 <br /> feet bgs to characterize the extent of hydrocarbon impact to shallow soil. Sampling <br /> locations should be based on odor and PID readings observed during ozone <br /> injection well installation. <br /> o Preparation of at least two geologic cross sections oriented parallel to and <br /> perpendicular to the groundwater flow direction showing subsurface lithology, <br /> depth to water, and chemical data. <br /> o The inclusion of locations, size, and fuel types of both of the existing USTs, and <br /> associated piping, on Site map figures. <br /> • By 30 October 2016, please submit an NOI Addendum, to serve as an application to <br /> operate under General Order R5-2015-0012, which includes: <br /> o A Monitoring and Reporting Plan which designates background, treatment, <br /> transition, and compliance zone wells and applicable sampling analytes and <br /> frequency. <br /> o A Contingency Plan with background analytical data for arsenic, total chromium, <br /> hexavalent chromium, bromide, and total dissolved solids and calculated Action <br /> Levels. This Plan shall commit to specific actions that will be taken within a <br /> relatively short period of time, to address exceedances above Action Levels <br /> observed in the compliance zone wells <br /> o Supplemental information outlined in Attachment 1 of the General Order. <br /> o A fee check in the amount of$4699.00. <br /> If you have any questions or concerns regarding comments in this letter please contact me by <br /> phone at (916) 464-4615 or by email at alan.buehler@waterboards.ca.gov. <br /> Alan M. Buehler, P.G. <br /> Engineering Geologist <br /> cc: Bill Cook, Condor Earth Technologies Inc., 188 Frank West Circle #1, Stockton 95206 <br /> Nuel Henderson, San Joaquin County Environmental Health Department, Stockton <br />