SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

Former Shell Service Station Page 2 1313 East Charter Way March 10, 2011 Stockton, California 95205 12/17-19/02 Dates when monitoring wells MW-1 through MW-5 were installed on-site. All five wells were screened between 38 and 513 feet bsg. 05/02/03 Date of Site Investigation/Quarterly Monitoring Report-First Quarter 2003 submitted by Cambria that described the installation of five monitoring wells and reported the soil and groundwater analytical results from the well installation. 03/05/04 Date of Site Investigation Work Plan submitted by Cambria that proposed the advancement of five CPT borings (SB5 through SB-9) and installation of four monitoring wells (MW-6 on-site, and MW-7 through MW-9 off-site). 0613-4104 Dates when CPT borings S13-5 through SB-9 were advanced on-site to approximately 100 feet bsg. 12127-29104 Dates when MW-6 was installed on-site and MW-7 through MW-9 were installed off-site; all wells were screened betweep 38 and 53 feet bsg. 03/25/05 Date of Site Investigation and First Quarter 2005 — Quarterly Monitoring Report { submitted by Cambria that described he soil classification based on the CPT logs and reported the analytical results of groundwater samples collected from SB-5 through SB-9, and 1,2-dichloroe hane analytical results for soil samples collected from the installation of MW-6 t irough MW-9. 11/08/05 Date of meeting attended by EHD nd Cambria during which discussions focused on the need to begin groundwa er extraction at this site. 11/14/05 Date of Site Conceptual Model submitted by Cambria, recommending the performance of interim remediation to reduce the 1,2-DCA concentrations in groundwater. 03/22/06 Date of meeting attended by EHD, Cambria, and Central Valley Regional Water Quality Control Board (CVRWQCB) during which discussions focused on installing a temporary groundwater extraction system. 10/12/06 Date that the temporary groundwater extraction system began operation, extracting groundwater from monitoring well MW-1. 07/19/07 Date of Site Investigation Work Plan submitted by CRA proposing the advancement of three CPT borings, SB-1 0 through SB-12, off-site to define the 1,2-dichloroethane (1,2-DCA) plume down gradient of the contaminant source. 11/7-9107 Dates when CPT borings SB-10 through SB-12 were advanced off site to approximately 60 feet bsg. 01/16/08 Date of Site Investigation Report submitted by CRA that described the soil lithology based on the CPT logs and reported the soil and groundwater analytical results collected during the advancement of CPT borings SB-10 through SB-12. 04/16/08 Date when the groundwater extraction system was expanded to include groundwater removal from MW-6.