Laserfiche WebLink
f <br /> National Pollution Discharge Elimination System(NPDES)Permit Application <br /> Flag City New West No 1003 6437 West Banner Street,Lodi,California <br /> Page 3 <br /> Receiving water and discharge water monitoring will also include observations for the <br /> presence or absence of suspended matter, discoloration, bottom deposits, aquatic life, sheen, <br /> visible film, fungi, and any potential nuisance conditions Field measurements and <br /> observations will be recorded in notebooks, kept on site, and reported in quarterly reports <br /> submitted to the CRWQCB, and regulatory agencies <br /> Samples will be collected weekly during the first four consecutive weeks following system <br /> startup Sampling will then continue on a monthly basis When breakthrough at the first <br /> carbon canister is detected the system will be shut down The primary carbon will be <br /> removed from service, and the second canister will be used in the primary position New <br /> carbon will be added to the series in the tertiary position, and the system will be restarted <br /> 7 See Attachment C, the sample is a composite of EW-1 through EW-5 just as the system <br /> will be operating prior to treatment and after approval of this application <br /> B Site hydrology <br /> 1 See Table 1 <br /> 2 See Figures 5 and 6 Groundwater direction is to the southeast with a gradient in the first <br /> • zone of 0 0010 ft/ft and 0 0014 ft/ft in the second zone <br /> 3 See Tables 2 through 4 for construction and analytical results, and Figure 2 for well <br /> locations Other contaminant sources could include the Flag City Chevron south of the site <br /> and non-point agriculture sources <br /> 4 Discharge from the remediation system will not impact the groundwater in the area and <br /> should only improve water quality in White Slough <br /> 5 The initiation of the ground water treatment system will contain the MTBE plume at the <br /> extraction wells, effectively reversing the localized gradient away from the municipal wells <br /> The locations of the extraction wells downgradient from the site at a 50-foot spacing will <br /> provide a barrier, thus halting the offsite migration of MTBE <br /> 6 There is currently no estimate of anticipated length of time extraction will be needed, <br /> however, as future drilling of off-site and system operation and monitoring begins, more <br /> data will be available to project cleanup time <br /> 7 None <br /> 8 Not Applicable <br /> • <br />