SITE INFORMATION AND CORRESPONDENCE

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r San Joaquin County Environmental Health Depnartment DIRECTOR Donna Heran, REHS 600 East Main Street Q: PROGRAM COORDINATORS Stockton, California 95202-3029 Robert McClellon,REHS Jeff Carruesco, REHS,RDI r� Kasey Foley,REHS Website: www.sjgov.orgiehd aLinda Turkatte,REHS Phone: (209) 468-3420 Fax: (209) 464-0138 December 9, 2011 Mr. Thomas Sexton Shadrall Hammer Lane L.P. Ultramar Inc. Mr. Eric Schneider 685 West Third Street c/o Auburndale Properties, Inc. Hanford, CA 93230 5670 Wilshire Boulevard, Suite 1470 Los Angeles, CA 90036 Subject: Beacon #3641 1 Shadrall Property#1415 LOP Case#: 1125 1210 East Hammer Lane APN: 094-030-12 Stockton, CA 95210 Geotracker ID#: T0607700492 The San Joaquin County Environmental Health Department (EHD) has received a Concurrence to No Further Action Request letter from the Central Valley Regional Water Quality Control Board (CVRWQCB) dated December 2, 2011. The site can qualify to apply for monitoringlremediation well removal as soon as the requested record fee title owner information is received. (form attached). You may then submit EHD Well and Boring Permit Application forms that details the methods and materials to be used to destroy the wells, which addresses the following well destruction concerns and requirements of the EHD: • Wells that have laboratory data as of the last sampling event that found contaminants present or are located in an area identified to contain residual contamination, are to be destroyed by removing the contents of the well (PVC, sand, bentonite) by over-drilling the borehole or exploding the well internally (wire-line). All drilled out, cleared boreholes are to be sealed with neat cement by grouting from the bottom up, to at least five feet below grade, or to the surface if you wish. Wire-lined boreholes only need to be topped off with neat grout and surface-finished to match the surrounding surface. • Wells that were found at their last sampling event to be non-detect for contaminants and are outside of the areas of residual contamination may be destroyed by pressure grouting with the well casing left in place. Plan on providing 25 pounds per square inch of liquid grout pressure for 10 minutes for this procedure. Then after the grout level stabilizes, the top five feet of the well shall be drilled out with the same size auger as originally installed, the remaining hole is to be filled with at least 18 inches of neat cement grout, or it may be filled to the surface and topped off to match the surrounding surface. • This site has multiple monitoring wells that are located off of the gas station property that are on property also owned by Shadrall Hammer Lane LP or 99 Cent Only Stores Corporation. All of the properties with Ultramar wells that are owned by one landowner may be on a single permit. As such, the EHD will require only two permit applications and two fees for this well destruction phase.