SITE INFORMATION AND CORRESPONDENCE_FILE 1

Home Browse Search

Messrs Trommer and Lamin %r 19 June 2008 Preliminary Five-Year Review Letters Page 5 of 7 Various Sites 2651 Airport Way, S. • The CUF recommended that the EHD direct assessment of remedial technologies and implement active remediation to achieve WQOs in a timely manner. The EHD agrees with these recommendations but notes that a report of findings for four cone penetration test (CPT) borings with membrane interface probe (MIP) logs advanced last April is in preparation; upon receipt and review of the report, the EHD will issue directives as appropriate. The EHD anticipates the directives will be as recommended by the CUF. 3755 Munford Avenue • The CUF recommended that the EHD direct the RP to implement groundwater remediation to achieve WQOs in a timely manner; the EHD agrees with the recommendation, noting that SVE is in progress and the consultant has recommended addition of IAS and installation of additional SVE wells. The EHD will be requesting a corrective action plan (CAP) to evaluate the most effective technology to employ. 139 Center Street, S. • The CUF recommended that the EHD direct the RP to assess remedial technologies and the potential for vapor to enter nearby buildings; the EHD agrees with these recommendations. 308 EI Dorado Street, S. • The CUF recommended that the EHD direct assessment of remedial technologies and implement active remediation to achieve WQOs in a timely manner. The EHD agrees with these recommendations, a directive letter has been sent. 244 Harding Way, W. • The CUF recommended that the EHD direct the RP to define the extent of groundwater contamination northeast of MW-1; the EHD agrees with this recommendation and has approved additional monitoring wells east-northeast and west of MW-1. Grab groundwater sample data from CPTs north of MWA have been non-detect. 3250 Hammer Lane, W. • The CUF recommended assessment of remedial technologies to achieve WQOs more rapidly; the EHD agrees with this recommendation. The consultant has recommended ozone injection; a report on the evaluation of ozone injection is pending. 3400 Newton Road • The CUF concurred with the EHD directive to install four additional groundwater monitoring wells, but recommends that the appropriateness of conducting an SVE test be evaluated. The EHD has approved a 48-hour groundwater extraction test, but has no documentation of approving an SVE test. 5-Year Review Comment Letter 061908.doc