ARCHIVED REPORTS_THIRD QUARTER 2011 SITE STATUS, REMEDIAL SUMMARY, AND GROUNDWATER MONITORING REPORT

Home Browse Search

Stantec L & M OPERABLE UNIT-THIRD QUARTER 2011 SITE STATUS, REMEDIAL SUMMARY, AND GROUNDWATER MONITORING REPORT Introduction October 28, 2011 • Field data sheets for 3Q11 monitoring and sampling, separate phase hydrocarbon (SPH) removal event, and monthly site operational maintenance of the active remediation system; • A summary of soil vapor sampling activities for 3Q11; and, • A summary of remedial activities for 3Q11. 1.1 SITE DESCRIPTION This Third Quarter 2011 Site Status Remedial Summary and Groundwater Monitoring Report describes activities conducted on behalf of CEMC and COP for the Site located adjacent to and along the eastern boundary of the Delta View Apartments (802 West Weber Avenue) and west of the North Lincoln Street and West Weber Avenue cross road in San Joaquin County, California (Figure 1). The Site is currently owned by the city of Stockton, which refers to the Site as "Parcel 2A". The Site currently consists of relatively flat, fallow land and is mostly undeveloped except for the Delta View Apartments (formerly the Delta Gateway Apartments) located on the western and southern portion of the Site. A recently constructed State Department of Motor Vehicles (DMV) building resides to the southeast of the Site. The Stockton Deep Water Channel, Weber Avenue, and an office building complex are located north of the Site. The Mormon Slough, Work Net building, and a children's museum are located to the southwest, south, and east of the Site, respectively. During a December 2, 2002 meeting with the RWQCB-CVR, environmental management of the Site was divided into three operable units (OUs): L&M OU; Unocal OU (UOU); and Morton OU (MOU). The L&M OU was established to direct investigations in the area south of West Weber Avenue, west of the midline of the former Harrison Street, east of North Edison, and north of former Main Street (Appendix A). This OU includes monitoring wells MW-9, 2AMW-12 through 2AMW-14, MW-16 through MW-35, MW-42 through MW-52, MW-54, MW-55, and dual phase extraction (DPE) wells DPE-1 through DPE-13; the DPE network once included well MW-40 which was converted to a DPE well permanently during the second quarter 2007, but was abandoned during the fourth quarter 2008 due to the city of Stockton's excavation activities at the UOU. The UOU was established to direct investigations from West Weber Street south to the former Main Street and from the midline of the former Harrison Street east to Lincoln Street. The UOU includes monitoring wells MW-3, MW-7, MW-37 and MW-38. The MOU was established to direct investigations from the middle of the former Main Street down to the southern boundary of Parcel 2A and from the midline of the former Harrison Street east to Lincoln Street. The MOU includes monitoring well 2AMW-15. Currently, oversight of environmental management responsibilities of the L&M OU is retained by Stantec on behalf of CEMC and COP, and oversight of the UOU and MOU is performed by Wallace Kuhl Associates (Wallace-Kuhl), on behalf of the city of Stockton. I:\Tidewater\TW Stockton(P2A)\QMRs\2011\3Q11\3011 QSSR QRSR QMR Stockton_FINAL.doc 1.2