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Well Destruction Results Report �� vmww Moore Petroleum Bulk Plant,5491 `F'Street,Banta,California Page 6 (TPHg), as diesel (TPHd), as kerosene(TPHk), and as motor oil (TPHmo). The reduced analytical suite was approved in a letter from the SJCEHD, dated July 2, 2009. June 12, 2009—Apex submitted a Monitoring Well Installation Workplan, proposing to install a deep screened well (MW-18) to a depth of 80 feet bgs via conductor casing to 52 feet bgs to determine the vertical extent of contamination at the site. The workplan was approved by the SJCEHD in a letter dated July 2, 2009, under the condition that the well be installed with 10 feet of screen. July 2, 2009—Apex received a letter from the SJCEHD, reducing the required sampling frequency for wells at the site. Under the new sampling program, wells MW-3, MW-4A, MW-7, MW-8, MW-10, MW-11, MW-12, RW-2 and VEW-2 will be sampled semi-annually and wells MW-2, MW-5, MW-6, MW-9, MW-13, MW-14, MW-16 and MW-17 will be sampled annually. The letter did not provide sampling frequencies for wells MW-1 and MW-15. The letter recommended that the SVE system be turned off to perform rebound testing. Additionally, the letter approved a confirmation soil vapor survey during the SVE system rebound testing to further assess the risk posed by vapor intrusion at the site. September 8 and 10, 2009—Apex supervised the installation of monitoring well MW-18 at the site. Drilling activities are detailed in Apex's Third Quarter 2009 Groundwater Monitoring and Monitoring Well Installation Results Report, dated November 11, 2009. 1.1 November 12, 2009—Apex submitted a Confirmation Soil Vapor Survey Workplan to the SJCEHD. V August 5, 2010—The SJCEHD issued a letter approving the November 12, 2009, Confirmation Soil Vapor Survey Workplan, with the condition that vapor probes SVP-14 and SVP-15 be analyzed for TPHd. The letter also stated that if the results of the soil vapor survey are favorable, a closure report should be prepared for the site. 1� December 10, 2010—Apex submitted a Drilling Addendum Letter to the SJCEHD. August 3, 2011 —Apex submitted a First Quarter 2011 Groundwater Monitoring Report, Soil Vapor Survey Results Report, Human Health Risk Assessment, and Closure Report to the SJCEHD. V April 19, 2012—The SJCEHD issued a letter concurring with the Central Valley Regional Water Quality Control Board (CVRWQCB)recommendation for case closure. In the letter the SJCEHD has begun the 30-day closure notification period and has requested a workplan be submitted for proper well destruction which is included below. August 20, 2012—The SJCEHD issued a letter concerning the comments received during the 30-day public participation period for closure. Based on the concerns of the local landowners regarding health, SJCEHD requested that domestic wells on adjacent properties not previously sampled be sampled before site closure is granted.