Laserfiche WebLink
Vernon To "Marcus Pierce" <mpierce@waterboards.ca.gov> <br />Elarth/Sacramento/URSCorp cc devra.lewis@us.army.mil, scott.hilyard@us.army.mil, <br />08/08/2007 12:14 PM Edward Titus/Sacramento/URSCorp@URSCORP, Joe <br />Trapasso/Sacramento/URSCorp@URSCORP, <br />bcc <br />Subject Re: Field Sampling Plan Addendum for FMS #24 UST Site[ <br />History: ts;�, This message has been forwarded. <br />Marcus, <br />We have reviewed and addressed the comments presented in your email dated July 26, 2007. <br />Please see the revised addendum presented below. <br />Field Sampling Plan Addendum for FMS #24 UST Site <br />URS Group, Inc. (URS) has prepared this Field Sampling Plan (FSP) Addendum at the request of <br />the Regional Water Quality Control Board (RWQCB) to further assess the petroleum -impacted <br />soil and groundwater at the California Army National Guard (CA ARNG) Stockton FMS 924 <br />Underground Storage Tank (UST) Site. During our 20 June 2007 telephone conversation you <br />requested an additional investigation to complement the April/May 2007 sampling activities, <br />during which petroleum -impacted soil, soil gas, and groundwater were reported. This FSP <br />Addendum proposes sampling activities intended to satisfy the need for additional data. These <br />additional activities will be completed prior to the submittal of a formal report documenting the <br />site investigation results. URS will follow the same procedures presented in the 25 August 2006 <br />Final FSP, unless otherwise noted. <br />Background <br />From 30 April 2007 through 03 May 2007, URS conducted a subsurface investigation at the <br />Stockton FMS#24 UST Site, which included the drilling of three hand -auger and five <br />hollow -stem auger borings. Soil, soil gas, and groundwater grab samples were collected as part <br />of the investigation. Total petroleum hydrocarbons as diesel (TPHd), TPH as gasoline (TPHg), <br />and volatile organic compounds (VOCs) were reported at the site in all three sample media (see <br />the attached tables for the analytical summaries). The analytical data revealed that the impacts <br />extend beyond the original borings drilled at the site. This proposed investigation will attempt to <br />determine the lateral extent of contamination. <br />Proposed Scope of Work <br />Please see the attached figure for the proposed drilling locations. <br />Sensitive Receptor Survey <br />URS will perform a sensitive receptor survey to identify locations of all water wells (municipal, <br />domestic, and agricultural), surface water bodies, schools, and other receptors within 2,000 feet <br />of the UST site. The survey will consist of reviewing Department of Water Resources (DWR) <br />San Joaquin District office well information for the Township, Range, and Section in which the <br />site is located; contacting the San Joaquin County Department of Environmental Health, <br />City of Stockton Municipal Utilities Department (CSMUD) and California Water Service <br />