Laserfiche WebLink
• , /'!'•�1�`, Ecmuno C ORowl;Jv <br /> c,l I s 0 n R ^ � w1rtT`.ICW HOGRIOU[_' <br /> Water Boards <br /> Central Valley Regional Water Quality Control Board <br /> TO: Joseph Mello, CHG <br /> Senior Engineering Geologist <br /> FROM: Kristi Shelton, P.E. <br /> Water Resources Control Engine <br /> DATE: 23 January 2013 <br /> SUBJECT: REVISED CLEANUP PLAN, NUSTAR TERMINALS OPERATING <br /> PARTNERSHIP L.P., STOCKTON TERMINAL, STOCKTON, SAN JOAQUIN <br /> COUNTY <br /> I reviewed the 7 November 2012 Revised Cleanup Plan (Report) prepared by Ash Creek <br /> Associates, Inc. (Ash Creek) on behalf of NuStar Terminals Operating Partnership, L.P. <br /> (NuStar) Stockton Terminal at 2941 Navy Drive in Stockton (Site). The facility is within the Port <br /> of Stockton leasehold, which also includes Buckeye Partners, Time Oil, and Tesoro (collectively <br /> Stockton Terminals Technical Committee [STTC]), and Kinder Morgan Energy Partners <br /> (KMEP). <br /> In 2006, NuStar evaluated a number of remedial technologies and prepared a Cleanup Plan that <br /> recommended monitored natural attenuation (MNA) coupled with liquid phase hydrocarbon <br /> (LPH; aka "free product") removal. Central Valley Water Board staff did not concur with the <br /> recommendation for MNA and requested that NuStar reevaluate the use of groundwater <br /> extraction at the Site. In 2007, NuStar submitted an addendum to the 2006 Cleanup Plan that <br /> concluded groundwater extraction would not significantly accelerate the time to reach water <br /> quality objectives (WQOs) over MNA. Between 2006 and 2010, NuStar conducted several <br /> investigations and my 19 March 2012 letter requested NuStar to prepare a revised Cleanup <br /> Plan summarizing the results 61 the additional investigations and include recommendations to <br /> address the petroleum hydrocarbon plumes at the Site. Free product has not been observed <br /> since 2006. <br /> 1 have the following comments on the Report. <br /> 1. The Report evaluated the current Site conditions and concludes the only potentially <br /> complete exposure pathways are direct contact with soil and groundwater by <br /> construction workers during excavation. Properties downgradient of the Site include a <br /> 44-megawatt power generation facility, a steel distribution operation, a metal scrap yard, <br /> a recycling yard, a truck washing operation, vacant parcels, and various other industrial <br /> facilities. There are no drinking water supply wells within one mile downgradient of the <br /> Site. NuStar states that workers at the Site are trained in the appropriate handling of <br /> petroleum hydrocarbons to mitigate the current potential risk presented by residual <br /> hydrocarbons in soil and groundwater at the Site. <br /> KAR_ E. _ONOLEY SCD, ('.E.. CHAIR I PAMELA C. CFECDoti P.E.. DCEE, EXECUTIVE OGPCEP <br /> 11(120 Sun r,@111pr 1)r—#200 Rannhn Cordova.CA 956.70 www watarbnard5 ca g—,/r..enlralvaliRy <br />