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ARCADIS. <br /> ARCADIS U.S.,Inc. <br /> Infrastructure,.buildings, environment, communications 2033 North Main Street <br /> Suite 340 <br /> Walnut Creek <br /> California 94596 <br /> Mr. Rob Saur Tel 925.274.1100 <br /> Remediation Project Manager Fax 925.274.1103 <br /> PG&E Environmental Remediation <br /> 3401 Crow Canyon Road www.arcadis-us.com <br /> San Ramon, CA 94583 <br /> Subject: <br /> �Lll Site Assessment Report <br /> Pacific Gas and Electric Company <br /> Lorraine Transformer <br /> 8004 Lorraine Avenue <br /> Stockton, California Date: <br /> January 21, 2009 t <br /> Dear Ms. Lagorio: Contact: <br /> Kathleen Abbott <br /> LARCADIS U.S., Inc. (ARCADIS) has prepared this report to document environmental Phone: <br /> assessment activities for Pacific Gas & Electric Company's (PG&E's) Lorraine 925.296.7825 <br /> Transformer T-1445 (the site) located at 8004 Lorraine Avenue in Stockton, <br /> California. Work at the site was conducted in accordance with the approved Work Ercall: <br /> Plan for Soil Investigation dated September 3, 2008(approved by email from Kathleen.Abbott <br /> Margaret Lagorio October 22, 2008). @arcadis-us.cam <br /> Our ref: <br /> Background B00092297.0000 <br /> The site is an unstaffed PG&E subsurface transformer. On October 16, 2007, the <br /> transformer over-pressurized and released an estimated 42 gallons of mineral oil into <br /> the vault and an underground electrical conduit. A fire occurred as a result of the <br /> transformer failure. PG&E and NRC Environmental Services performed emergency <br /> response clean-up, including the removal of transformer oil and water from the vault <br /> j and electrical conduit, as well as pressure washing the street near the transformer <br /> and cleaning out a nearby catch-basin. <br /> The oil from the transformer was sampled and contained less than one part per <br /> billion (ppb)of polychlorinated biphenyls (PCBs). The transformer vault is estimated <br /> to be approximately 3 feet deep and during cleanup activities a small hole was <br /> identified in the bottom of the transformer vault. Soil sampling was conducted to ` <br /> evaluate if mineral oil had impacted soil beneath and around the vault. <br /> r1 Imagine the result <br />