SITE INFORMATION AND CORRESPONDENCE

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0 Rainwater Car Wash Page 2 420 West Yosemite Avenue October 24, 2011 Manteca, California 95337 06/29/00 Date when MW-1 through MW-4 were installed, each screened between 12 and 32 feet bsg. 07/07/00 Date when MW-5, screened between 8.5 and 28.5 feet bsg, was installed. 09/08/00 Date of Sensitive Receptor Survey submitted by Advanced GeoEnvironmental, Inc. Two municipal water supply wells were identified within 2,000 feet of the site. One well (City of Manteca Well No. 4) is about 1,900 feet northwest of the site and reportedly is non-operational; the other well (City of Manteca Well No. 5) is operational and about 1,500 feet south of the site. The survey is available on Questys, file XR0006839. 09/20/00 Date of Quarterly Report — Third Quarter 2000 submitted by Advanced GeoEnvironmental, Inc. that described the installation of monitoring wells MW-1 through MW-5 on-site. The report is available on Questys, file XR0006837. 10/26/00 Date of Work Plan Addendum submitted by Advanced GeoEnvironmental, Inc. that proposed the advancement of 5 cone penetrometer test (CPT) borings to approximately 100 feet bsg to define the vertical extent of petroleum hydrocarbon-impacted groundwater. The addendum is available on Questys, file XR0006849. 12/18-20/00 Dates when 4 CPT borings, P-7 through P-10, were advanced to approximately 150 feet bsg and grab groundwater samples were collected from adjacent borings at selected depths. 02/07/01 Date of Cone Penetromer Testing Site Investigation — Fourth Quarter 2000 submitted by Advanced GeoEnvironmental, Inc. that reported the analytical results from the CPT investigation. The report is available on Questys, file XR0006835. 03/12/01 Date of Remedial Investigation/Feasibility Study Work Plan submitted by Advanced GeoEnvironmental, Inc., proposing the installation of one groundwater extraction well (EW-1), one observation well (MW-6), and performance of a twelve-hour groundwater aquifer pump test. The work plan is available on Questys, file XR0006848. 03/30/01 Date when extraction well EW-1 and groundwater observation well MW-6 were installed. 04/05/01 Date when groundwater aquifer pumping test was performed by Advanced GeoEnvironmental, Inc., extracting first water zone groundwater from EW-1. 05/15/01 Date of Groundwater Aquifer Pumping Test Report — Second Quarter 2001 submitted by Advanced GeoEnvironmental, Inc., that described the installation of EW-1 and MW-6, both screened between 20 and 45 feet bsg, and results from the pumping test. (Soil samples were not collected during the well installations.) The report is available on Questys, file XR0006833.