ARCHIVED REPORTS XR0001318 - Laserfiche WebLink

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URS MAR 2 9 2004 ENVY IOWEN F HEALTH March 25, 2004 PERMIT/SERVICES Ms Lori Duncan, Senior REHS 04493 San Joaquin County Environmental Health Department 06 a3 304 East Weber Avenue, Third Floor Stockton, California 95202 Subject: Deep Monitoring Well Installation and Fourth Quarter 2003 Groundwater Monitoring Report Former ARCO Service Station No.4493 205 North Center Street,Stockton,California Dear Ms Duncan URS Corporation Americas (URS) has prepared this report on behalf of Atlantic Richfield Company (ARCO—a BP affiliated company) to document the installation of one deep single-completion groundwater monitoring well at former ARCO Station No 4493 located at 205 North Center Street in Stockton, California (Figure 1) The purpose of this effort was to install a deep groundwater monitoring well to evaluate the vertical extent of gasoline-related hydrocarbons in groundwater at the site The deep monitoring well was installed as requested by the San Joaquin County Environmental Health Department (SJCEHD) in a letter dated March 21, 2003 (Attachment A) The deep monitoring well was installed dust downgradient from the former pump islands in the area containing the highest petroleum compound concentrations This work was performed as described in the URS Work Plan Addendum for Dual-Completion Monitoring Wells dated May 15, 2003 The URS work plan addendum was approved by the SJCEHD in a letter dated May 29, 2003 (Attachment A) The SJCEHD drilling permit for the deep monitoring well is included as Attachment B URS is currently negotiating with the State of California to place a dual-completion groundwater monitoring well set on state property downgradient of the site The proposed downgradient location is in the parking lot (southeast side) at the State of California property located at 31 East Channel Street (Figure 2) The location was approved by the SJCEHD in correspondence dated December 8, 2003 (Attachment A) SITE BACKGROUND The former ARCO Station No 4493 site is located at 205 North Center Street in Stockton, California Three 12,000-gallon underground storage tanks (USTs) were installed at the site in 1984 The service station was demolished and the USTs were removed during the first quarter of 1999 The site is located on property identified as Weber Point, the Stockton Channel is adjacent to the site to the south The City of Stockton has redeveloped the Weber Point area as a city park y URS Corporation Crown Corporate Center 2870 Gateway Oaks Drive Suite 300 Sacramento CA 95833 Tel 916 679 2000 Fax 916 679 2900