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Site History Boyett Petroleum(419 S. Main St.,Manteca) Page 3 of 6 comply with California Assembly Bill 2886. The survey data were collected with a Trimble 5700 Centimeter-Level RTK Global Positioning System(GPS) and referenced to the North American Datum of 1983 (NAD83). On November 20, 2002, Condor conducted a sensitive receptor survey (SRS) within a 2,000-foot radius of the site to identify potential areas of groundwater recharge or discharge, schools, and potential water well users that could be impacted by migration of groundwater from the site. The findings of the SRS included: Eighteen California Department of Water Resources (DWR) Central District well records pertained to 23 wells that were verified to be within the study area. During the area reconnaissance, Condor was unable to locate 20 of the 23 wells indicated by DWR well records. Of these 20 wells, 14 were classified as monitor wells, four were classified as extraction wells, one was listed as an irrigation well, and one was indicated as "other". According to a Pacific Gas and Electric Company (PG&E) representative, PG&E is the owner of the well designated as "other". Of the three remaining wells, one well was destroyed (as documented by the DWR), and two monitor wells(indicated on a single well record) were identified. A well record for a property located at 151 S. Main Street indicated that two monitor wells were installed in 1996. These wells are part of a group of monitor and extraction wells that were not visible during Condor's area reconnaissance. The two monitor wells are located approximately 1,000 feet north of the site. • Four well locations not included in the information provided by the DWR were identified during the area reconnaissance. These included: A municipal well located at 323 (331) Jessie Avenue, approximately 1,500 feet west of the site. Nine monitor wells located on-site at 419 S. Main Street, including the one located across Wetmore Avenue. Five monitor wells located at 151 S. Main Street, approximately 1,000 feet north of the site. One drinking water well located at Manteca High School, approximately 1,800 feet northeast of the site. Two schools were identified within the study area: Manteca High School located at 450 E. Yosemite Avenue, approximately 1,400 feet northeast of the site. Manteca Community Day School located at 680 Mikesell Avenue, approximately 1,600 feet east of the site. One municipal water well, the City of Manteca Well #5, was observed at 323 Jessie Avenue, approximately 1,500 feet west of the site. Mr. Eric Medeiros of CMPW described this well as installed in 1952 to a total depth of 125 feet bgs and was constructed using 100 feet of 18-inch _.:aL .,. _..,..] :..a.._.....1.. AST_. T.... %IT..11- _VC L.. I�:a... ..C A Ir.._..�...... 77..1..1:.. 717....1... !/"�T,lrmn Liaa1L r, YY ILII 11V aLl1.1.111.11 111 LL.1 Vala. lVll. JV%, YY clla V1 LL M; l�ll�' Vl 1Vlal1 Lk.4 a A LALJ11L+ YY V1 AJ t11V11 YY J indicated that a groundwater sample collected from this well in September 2002 tested negative for MTBE.