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L & M OPERABLE UNIT - THIRD QUARTER 2013 SITE STATUS, REMEDIAL SUMMARY, <br /> AND GROUNDWATER MONITORING REPORT <br /> Appendix B <br /> Page 4 <br /> performed and initial groundwater and air influent and effluent samples were collected on March <br /> 18, 2004. SECOR submitted a request to the SJVAPCD for modifying the existing air permit, <br /> which included the operation of the DPE system using natural gas rather than propane, and <br /> extension of the life of the permit. SJVAPCD required that the revised permit be resubmitted for <br /> public review over a 30-day period, which ended on July 15, 2004. Throughout the duration of <br /> the review period, the SJVAPCD did not authorize the operation of the DPE system under the <br /> existing permit due to minor detections of polyaromatic hydrocarbons (PAHs) in the effluent <br /> sample collected on March 22, 2004. Since no public comments were received by July 15, <br /> 2004, the SJVAPCD issued the revised air permit on July 20, 2004. Initial start-up and <br /> shake-down of the DPE system was performed on August 2 and 3, 2004. <br /> Concurrently during the installation of the DPE system, SECOR submitted the report entitled <br /> Work Plan For Pipeline Abandonment, Removal, and Soil Vapor Extraction Well Installation, <br /> dated April 15, 2004. This report outlined a plan for abandoning or removing the steel pipelines <br /> that were discovered during the December 2003 underground utility search on the Parcel 2A <br /> property, and locating pipelines that were anticipated beneath West Weber Avenue and the <br /> Waterfront Towers parking lot and beneath former Edison Avenue near the eastern entrance to <br /> the Delta View Apartments. The work plan also proposed the installation of horizontal SVE <br /> wells to extract petroleum hydrocarbons from soil beneath five apartment buildings to the south, <br /> west and northwest of the DPE remedial well field, and connection of those wells to the DPE <br /> system. The RWQCB-CVR approved the April 15, 2004 work plan and the June 14, 2004 letter <br /> addressing RWQCB-CVR comments to the work plan (Response to RWQCB-CVR Letter Dated <br /> May 14, 2004) in electronic correspondence dated June 21, 2004. <br /> SECOR completed pipeline abandonment/removal activities during the fourth quarter 2004, and <br /> the installation and connection of horizontal SVE wells to the DPE system during the third <br /> quarter 2005. Pipelines discovered during the December 2003 investigation, as well as <br /> additional pipelines discovered during pipeline abandonment/removal activities, were removed <br /> from the undeveloped portion of the L&M OU, soil was excavated to approximately 10 ft bgs, a <br /> 500-gallon steel UST was removed, and old well was properly abandoned, and pipelines <br /> trending off the undeveloped portion of the L&M OU were rinsed and filled with cement. <br /> Approximately 300 gallons of product/water mixture were removed from three pipelines and <br /> approximately 350 gallons of product was pumped out of the UST. Horizontal SVE wells were <br /> installed beneath the bottom of the excavation and the bottom was lined with a high density <br /> polyethylene (HDPE) liner. Additionally, six horizontal SVE wells were installed beneath five <br /> apartment buildings in the Delta View Apartment complex. Final results and a work plan for <br /> additional pipeline removal in the Waterfront Towers parking lot are presented in SECOR's <br /> Pipeline Removal, Abandonment, Soil Excavation, On-Site Horizontal SVE Well Installation, and <br /> Horizontal SVE Well Installation Beneath Delta View Apartments Report and Work Plan for <br /> Pipeline Removal, Abandonment, and Soil Excavation in Waterfront Towers Parking Lot dated <br /> February 10, 2005. <br /> 5ta ntec <br />