SITE INFORMATION AND CORRESPONDENCE

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Quick N Save No . 1 Page 2 of 3 1901 South EI Dorado Street April 7, 2015 Stockton, California 95206 • Terminate advancement of the boreholes and convert the borin s into monitoring wells , screened in the shallow zone of approximately thirty-five to fi¢fy feet bsg , if significant concentrations of petroleum hydrocarbon contamination are detected in soil samples during advancement of the boreholes; AGE notes that shallow monitoring wells will be installed only at the direction of EHD staff, and after EHD staff, a California Professional Geologist and AGE field staff have agreed that the well/s is/are necessary after reviewing field data; • If boreholes are terminated and converted into monitoring wells screened in the shallow zone, a second borehole will be advanced approximately five to ten feet from the initial borehole and soil sampling will resume at the depth of the previously terminated borehole, resulting in the proposed deeper-screened monitoring wells being installed in adjacent boreholes; • Collect a grab groundwater sample from a sandy interval in the shallow zone approximately thirty-five to fifty feet bsg if petroleum hydrocarbon contamination is detected; • Collect grab groundwater samples at approximately fifty feet bsg , targeting the coarse- grain sediment if present, and at total depth of the borehole using a push-driven water sampling device; • Analyze soil and grab groundwater samples for total petroleum hydrocarbons as gasoline (TPH-g) ; benzene, toluene, ethylbenzene and total xylenes (BTEX) ; methyl tertiary-butyl ether (MTBE) , ethyl tertiary-butyl ether (ETBE) , tertiary-amyl methyl ether (TAME) , di-isopropyl ether (DIPE) , tertiary butyl alcohol (TBA) , ethylene dibromide (EDB) and 1 ,2-dichloroethane ( 1 , 2-DCA) ; • Quarterly monitor and sample the newly-installed wells for constituents listed above for a minimum of one year following installation , development, and surveying of the monitoring wells ; and • Submit a report of findings following the field work. The EHD approves the Original Work Plan and Addendum with the following conditions: • Analyze soil and groundwater samples for naphthalene in addition to TPH-g , BTEX, MTBE, ETBE, TAME , DIPE , TBA, EDB and 1 , 2-DCA; • Collect grab' groundwater samples from the shallow zone between approximately thirty- five to fifty feet bsg regardless of field indicators and analyze the groundwater for constituents listed above; Reduce the sampling frequency of the newly-installed wells from quarterly to semi- annually after one year; and • Notify the EHD at least two weeks prior to the field work and note that field work cannot begin sooner than five days after the permits have been issued.