SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

Chronology 601 South Ventura Stockton CA 95206 Site Code: 1275 The site is currently used by TNT Broadway as a trucking facility which is consistent with recent historical use. The site is located on San Joaquin County APN 140-090-01 and is owned by the McAllister Trusts that is administered by Northern Trust of California located at 580 California Street, Suite 1800 San-Francisco I CA 94104. In 1989 two underground storage tanks were removed and soil samples collected. At the time of removal, a petroleum hydrocarbon sheen was observed floating on the groundwater that had seeped into the tank pit. Subsequently a series of excavations followed by stockpile aeration removed and remediated the contaminated soil. Groundwater contamination was remediated through limited pumping of water that seeped into the open excavation. Since all contaminated soil known to exist was removed and groundwater remediation has reduced groundwater contamination concentrations, PHSIEHD recommends that the site be issued closure/certification requiring no further action. 1989 319189 Two 8,000 gallon underground storage tanks were removed this dated. Tank #1 formerly contained diesel and tank #2 formerly contained regular gasoline. Soil samples were collected at approximately 13.5 feet below grade. The analytical results are attached. Soil discoloration and odor were observed as well as a sheen floating on the water that infiltrated the common tank pit. 10/25/89 Following an excavation attempt, soil samples were collected. See the attached table of results. A sheen on the water surface as well as petroleum hydrocarbon odors were observed. 1990 8115190 Three monitoring wells were installed, MW1 - MW3. Odors were observed during the installation of MW1 . The soil samples that were collected did not evidence soil contamination. See the attached soil analytical results. Observations based on visual and olfactory senses rather than PID measurements. Groundwater monitoring was initiated. See the attached groundwater monitoring results. 1992 3117192 Monitoring well, MW4, was installed in a down gradient location to define the extent of groundwater contamination observed in MW1 . 1993 11/12/93 Soil samples were collected for confirmation of the contaminated soil excavation. See the attached soil analytical results. Approximately 54,000 gallons of groundwater was removed from the excavation and ultimately disposed at the City of Stockton Wastewater Treatment facility located at 2500 Navy Drive. Monitoring well MW 1 was damaged during the excavation and subsequently destroyed under permit in January 1995.