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Our Project Number: E07171A Page 4 of 10 October 31, 2007 or other chemicals stored or used on the property. Pesticides, herbicides or other agricutural chemicals have been applied to the property. 3.0 PAST AND CURRENT SOURCES OF CONTAMINATION 3.1 Research Methods NOA employs a standard practice for review of database information. On a street map showing the location of the subject property, a circle is drawn one-quarter mile out from the property boundaries, and street maps or web-based mapping services are then used to determine address ranges for all streets within the quarter mile. All agency databases searchable by address are then searched for these address ranges. /3.1.1 Regional Water Quality Control Board NOA reviewed the Leaking Underground Storage Tanks (LUST) list (July 2007), the Water Purveyors Quarterly Report on MTBE (July 2007), and the Spills, Leaks, Investigations, and Cleanups (SLIC) list (1St Quarter 2005) on file with the Central Valley Regional Water Quality Control Board (CVRWQCB)4 in an attempt to determine if there are any files present at that agency which note the unauthorized release of a toxic or hazardous agent into the environment on the subject property or within a one-quarter mile radius of the subject property. The subject property was not listed on any of these databases, and no addresses within one-quarter mile of the subject property were found on the databases. 3.1.2 San Joaquin County Environmental Health Department According to Diane Martinez5 of the EHD, no files were available for the subject property address of 15709 Tretheway Road. The Underground Storage Tank Site Mitigation List, dated April 3, 2006 and the LOP/Non-LOP Sites list dated July 20, 2004, were reviewed at the EHD on October 19, 2007. No listed sites were found within one-quarter mile of the subject project. 3.1.3 San Joaquin County Office of Emergency Services The San Joaquin County Office of Emergency Services (OES) website6 was searched on October 19, 2007 in an attempt to determine whether a hazardous materials inventory is on file for the subject property. No records were found for the subject property. 3.1.4 San Joaquin County Agricultural Commissioner The San Joaquin County Agricultural Commissioner's Office' was contacted regarding use of agricultural chemicals on the subject property. Hazel Gallego of the Agricultural Commissioner's 4 California Regional Water Quality Control Board, Sacramento, www.swrcb.ca.gov. 5 Personal Communication, October 26, 2007. 6 San Joaquin County, Office of Emergency Services, http://sjoesdata.org/web_login_menu.lasso. 'San Joaquin County Agricultural Commissioner's Office, 1868 East Hazelton Avenue, Stockton, California. .� 902 Industrial Way•Lodi,CA 95240•209.367.3701 •Fax 209.369.4228 ©2007 Neil O.Anderson&Associates,Inc.