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J. R. Simplot, Lathrop -4- 1 August 2007 <br /> San Joaquin County <br /> 1) An estimate of the quantity of fluid released to the environment. This data can be <br /> used to help assess the actual risk of impact to the underlying groundwater. <br /> 2) A map or a figure to describe the leak area and the location of where the water was <br /> pumped out and released to the environment. <br /> 3) A summary table of analytical results from the collected media and/or soil samples <br /> (including groundwater if encountered) from the affected area. A table of sample <br /> results should include the method, depth, date and time of sample collection, criteria <br /> used for sample collection (i.e. pH) along with the concentrations of constituents of <br /> concern as listed in your Monitoring and Reporting Program No. 97-229 under <br /> Section D — Water Quality Protection Standard, subsection 1 — Constituents of <br /> Concern. <br /> 4) Laboratory results of all stockpile media/soils sampled, manifests for transport and <br /> disposal and name and location of disposal facility. <br /> 5) Verification that additional liquid from the tunnel sumps that is to be permanently <br /> diverted to the lined ponds does not increase the total load to the lined ponds <br /> beyond their design and/or permitted capacity as stated in your Waste Discharge <br /> Requirements (WDRs). Please provide a diagram or figure that shows the new <br /> piping layout. <br /> 6) A discussion of the data, (i.e. what affect the spill may have had or has had on <br /> groundwater and/or surface waters), proposed follow-up assessment of potentially <br /> impacted waters and/or soils, and comparison of residual chemical data to <br /> background levels for all chemicals of concern. <br /> 7) Conclusions and recommendations for any additional required assessment and/or <br /> remediation of soils and/or groundwater. <br /> Please ensure that the above items are addressed in the Completion Report and submit the <br /> report to this office by 12 September 2007. <br /> Surface Release from Holes in the Bottom of the UN32 Tank <br /> On 27 July 2006, Ms. Donna Murphy from J. R. Simplot called to report a leak from the UN-32 <br /> fertilizer tank. The leak was discovered during a routine inspection of the tank weld integrity. <br /> The tank holds 12,000 tons of UN-32 fertilizer (32% ammonium nitrate) or approximately 2.5 <br /> million gallons (per tank dimensions given by Ms. Murphy). Based on my telephone <br /> conversation on 18 September 2006 with Mr. Ralph Medema from J.R. Simplot, we <br /> understand that J. R. Simplot performed preliminary soil assessment work beneath the tank to <br /> determine the extent of the leak(s) and that a report of findings would be forthcoming. As a <br /> result of soil assessment work, the Detection Monitoring Program Work Plan (Detection <br /> Monitoring Program) dated 24 January 2007 was submitted to our agency. J. R. Simplot <br /> presented the findings and conclusions of the preliminary soil assessment work beneath the <br /> tank and proposed the installation of three monitoring wells with a timeline for completing the <br />