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CHRONOLOGY <br /> Former Shell Service Station <br /> 1313 East Charter Way <br /> Stockton, California 95205 <br /> 04/29/99 Date when one 8,000-gallon premium asoline, one 10,000-gallon plus gasoline, <br /> and one 10,000-gallon regular unlea ed gasoline underground storage tanks <br /> (USTs) were removed from the site jnder permit issued by the San Joaquin <br /> County Environmental Health Departm ant (EHD). <br /> 05/18/99 Date the EHD filed Unauthorized Release Form (URF) No. 99-U41 after <br /> laboratory analytical results revealed petroleum hydrocarbon contamination in <br /> soil samples collected during the removal of the former UST system. <br /> 05/28/99 Date the EHD filed Notification of Hazardous Waste Discharge No. 99-079. <br /> 07/14/99 Date of Limited Phase I Environmental Assessment and Sensitive Receptor <br /> Survey Report submitted by Cambria Environmental Technology, Inc. (Cambria). <br /> The survey identified one municipal, ore domestic, and three unknown-type wells_ <br /> within one-half mile of the site. Nos rface water was identified within the one- <br /> half-mile radius. <br /> 08/18/99 Date of Underground Storage Tank Removal Report submitted by Cambria that <br /> recommended case closure consideration based on analytical results that <br /> reported low concentrations of total p rgeable petroleum hydrocarbons (TPPH), <br /> and non-detections of benzene and inethyl tertiary-butyl ether (MTBE) in soil <br /> samples collected during the UST syst m removal. <br /> 06/01/00 Date of letter from the EHD informing the responsible party of his/her <br /> responsibility to perform corrective act on, and the placement of the site into the <br /> Local Oversight Program (LOP). <br /> 05/25/01 Date of Site Investigation Work Plan submitted by Cambria recommending the <br /> advancement of soil borings SB-1 through SB-4. <br /> 07119-27101 Dates when four cone penetration testing (CPT) borings, SB-1 through SB-4, <br /> were advanced on-site. SB-1 was advanced to total depth of 60 feet below <br /> surface grade (bsg); and SB-2 through SB-4 were advanced to total depth of 70 <br /> feet bsg. <br /> 11/07/01 Date Site Investigation Report was s bmitted by Cambria which reported soil <br /> lithology, and groundwater and soil analytical results from the advancement of <br /> the four CPT borings. <br /> 05/10/02 Date of Site Investigation Work Plan submitted by Cambria that proposed the <br /> installation of five monitoring wells. <br />