WORK PLANS - Laserfiche WebLink

Home Browse Search

Stantec 2010 TIDEWATER STOCKTON WORK PLAN of Parcel 2A and from the midline of the former Harrison Street east to Lincoln Street. The City of Stockton owns the area known as Parcel 2A. Liability for addressing impacts associated with historic operations on Parcel 2A has been addressed through a number of settlement agreements: • Pursuant to a settlement between Union Oil Company of California and the RDA, the RDA has assumed responsibility for the investigation and remediation of contamination on and emanating from the LOU. • Pursuant to a settlement between the L&M Group and the RDA, the RDA agreed, among other things, to remediate groundwater contamination associated with the UOU. • Pursuant to a settlement between the prior operator of the MOU and the RDA, the RDA has also assumed responsibility for the investigation and remediation of contamination on and emanating from the MOU. Although the RDA is currently responsible for assessment and remediation activities at the LOU and MOU, during recent discussions among the CRWQCB, representatives of the RDA, and representatives for the L&M Group, CRWQCB staff requested that the L&M Group undertake an aquifer test of groundwater collection trenches on the UOU as part of the evaluation of possible remedial approaches for impacted groundwater at the UOU. In an effort to demonstrate its willingness to cooperate with the CRWQCB in assessing site impacts the L&M Group agreed to prepare this workplan to undertake an aquifer test of the groundwater collection trenches at the Unocal OU. However, the L&M Group is doing so fully reserving all of its rights against the RDA. It is Stantec's understanding that the L&M Group will continue to have discussions with the RDA over an appropriate allocation of costs associated with any groundwater that has been affected by both the L&M OU and the Unocal OU. 1.2 SITE AND VICINITY BACKGROUND Historical usage of the Stockton area has been primarily industrial and residential since the late 1800s. The Site and Site vicinity were primarily marshland until 1895, when the area was filled, apparently to create more usable land for industrial use. By 1917, a network of railroad tracks had been laid within the vicinity of the Site. At that time, portions of the Site and Site vicinity were used to store bulk petroleum fuel products (Treadwell & Rollo [T&R], Volume II Site Characterization Report, South Shore Parcels, Stockton, California, December 13, 1999). In 1917 Associated Oil Company occupied a portion of the L&M OU, Standard Oil Company occupied a smaller portion of the L&M OU, and Union Oil Company was situated to the east of the L&M OU. The Site was occupied by lumber storage yards, a windmill and tank factory, and warehouses for grain storage (Environmental Resolutions, Inc. [ERI], Off-Site Source Investigation, The Stockton Group Property, West Weber Avenue and North Lincoln Street, Stockton, California, May 17, 2000). Southeast of the Site was once occupied by an additional lumber company. 1.2