SITE INFORMATION AND CORRESPONDENCE_FILE 2

Home Browse Search

Chronology Page 3 2801 West Lane, Stockton 07/17/95 Date of the Evaluation of Hydrocarbon Mobility report that discusses the work done on 514/95 and states that TPH-d does not pose a threat to groundwater so remediation is not warranted. 08/28/95 Date of EHD letter in response to Evalu tion of Hydrocarbon Mobility report dated 7119195 that recommends analysis for chlorinated hydrocarbons and TPH-d. 12/15/95 Date of Proposed Monitoring Program that includes a proposal to test soil and groundwater samples for TPH-d for 5 years. 03/13/96 Date of the' EHD letter approving the ecommendations noted in the Proposed Monitoring Program dated 12115195. The live year program would determine if active remediation was needed or if the site was a candidate for closure. 10/28/96 Date of the EHD letter stating the EHD had agreed to a five year post remedial monitoring program to allow verification of three assumptions used to justify a no further action remedial alternative by Dames and Moore which included that ground water depth would remain below 70 eet bsg, that diesel would not impact groundwater, and that natural attenuation of the diesel in the soil would occur. 08/03/98 Date of the EHD letter directing submittal of a work plan to conduct additional site investigation since groundwater had risen from 60 feet (1994) to 37 feet (July 1998). 12114-15/98 Monitoring wells DMW-6 and DMW-7 were installed on these dates. ' I i 02/04/99 Date of Draft Quarterly Groundwater Monitoring Report that discusses the work done on 12/14-15198. 07/31/01 Date of Closure Request Report, prepared by URS. No Further Action (NFA) recommended. Results of a Sensitive Receptor Survey are included in this report. I 01/30/02 Date of Fourth Quarter 2009 Quarterly Monitoring Report, prepared by URS. Groundwater sample results revealed detections of 1,2-DCA and no detections of TPH-d. URS recommends closure. 02/27/02 On this date EHD discussed with URS the need for more work to define the 1,2-DCA plume. 05/15-16/02 Five push point borings HP-1, 2, 6, 7 and $ ere advanced on this date. 07/22/02 Date of Closure Request Addendum Repot, 9,2-DCA that discussed the work done on 5/15-16/02 and recommended site closure. 04/16/03 Date of the EHD letter in response to Closure Request Addendum Report, 9,2-DCA denying URS's request for closure because the 1,2-DCA plume was not defined by the May 2002 investigation. 03/04/04 Monitoring wells DMW-8 and DMW-9 were 1 istalled.on this date.