Laserfiche WebLink
.. - ------------ <br /> Mr. <br /> - - .Mr. Robert Trommer <br /> t' Comments onCUFSite Closure Recommendations for Various Sites Page 7 of 7 <br /> March 3, 2010 <br /> Claim No. 17042 - I gAna S: Ira I Gy Blvd Trac <br /> i <br /> This site has persistent.moderate TPHg, and low ethylbenzene and xylenes contaminants in <br /> one well, MW-4. Wells toward the north, east and south are not impacted; there are no <br /> delineating wells toward the.west. A domestic well is located approximately .135.feet southwest <br /> of MW-4. In November 2009 limited groundwater extraction (GWE) was implemented utilizing <br /> MW-4. Approximately 15,000 gallons were extracted from the well. Since then the well has <br /> been monitored monthly; concentrations were reduced, -but may be.rebounding. The consultant <br /> plans to complete the rebound testing with the March sampling event and then prepare a report <br /> of findings. The plume appears to be of limited extent, except toward the west, which is not <br /> characterized..Significantly impacted soil has not been encountered on the site. There does not <br /> appear.to be a significant contaminant mass present, but the contaminants are persistent and <br /> there is a domestic well to,protect. The EHDwill issue:,a directive to prepare a site closure. <br /> summary report, addressing plume delineation and evaluation of vapor intrusion and health risk <br /> issues, threat to the domestic well, and other,site closure concerns. If a favorable report is <br /> rece.ived,+the EHD anticipates site closure in nine to.twelve months. <br /> { <br /> Claim No. 17179 - 15 E. Grant'Line Road Trac <br /> Dissolved contaminant concentrations have .declined to levels suitable for site closure <br /> consideration. The consultant,has recently obtained grab groundwater samples to complete the <br /> lateral and vertical delineation of'the.site, and1he results are pending. The: EHD will direct <br /> completion of a vapor. intrusion evaluation. Upon receipt, of,the results of the recent grab <br /> groundwater investigation -and the vapor intrusion evaluation, the 'EHD will initiate the site <br /> closure process if warranted by the additional information.'The EHD anticipates site closure may <br /> be obtained in six to twelve months. <br /> Surnmary <br /> .The EHD will be moving these site's to closure .as rapidly aspossible.:The EHD has responded <br /> previously to the CUF on these sites in response to the five-year reviews and. the annual <br /> updates., Direct comments from the CUF technical staff on the concerns expressed on the more <br /> problematic sites above are requested (specifically Claim! Nos. 8431; 7709, 11775, 14118, <br /> 14349, 14353, 15211, 15890, and 17042). An EHD representative is available to meet with <br /> your technical staff if that would be helpful. <br /> If you need more information to complete your,evaluation of these cases, please contact Nuel <br /> Henderson, Engineering Geologist, at (209) 468-3436, or nhenderson(c.sicehd.com. <br /> Sincerely, <br /> Nuel C. Henderson, Jr., PG Adrienne Ellsaesser, REHS <br /> Engineering Geologist Acting Program Coordinator <br /> { <br /> Comments on CUF Site Closure Recommendations 0310.doc <br /> i <br /> .. i <br />