Laserfiche WebLink
Wright <br /> v <br /> Environmental <br /> Services,Inc. <br /> Construction • Engineering • Remediation MOVED <br /> FF9 0 8 2007 <br /> ENVIRONMENT HEAUH <br /> / l6! <br /> November 17, 2006 PERMIT/SERVICES ` `7 <br /> Project No. 4090-Pl,/,s,�r� <br /> Michael Inf irna Jr., Senior REHS <br /> SAN JOAQUIN COUNTY ENVIRONMENTAL HEALTH DEPARTMENT <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202-2708 <br /> SUBJECT: Work Plan for Soil Vapor Sampling <br /> Ed's Muffler Shop Fuel Leak <br /> 595 East 111h Street, Tracy, CA 95736 <br /> Dear Mr. Infuma: <br /> Wright Environmental Services, Inc. (Wright), has prepared this Work Plan concerning proposed <br /> soil vapor sampling activities at the subject Site in Tracy. Attached to the Work Plan are: (1) a <br /> table providing an aggregate summary of soil test data for in-situ material (Table A); (2) a Site <br /> Plan showing the locations of these soil data points (Figure A); (3) a Site Plan showing the five <br /> proposed soil vapor sampling areas (Figure B); and (4) a Standard Procedures write-up detailing <br /> the soil vapor sampling process. <br /> Limited areas of soil at the top of the capillary fringe (above 12 feet below grade) contain residual <br /> concentrations of fuel (primarily the benzene component) that exceed Environmental Screening <br /> Levels (ESLs; SFBRWQCB, 2005). These areas mostly correspond to locations that were <br /> inaccessible to physical excavation conducted in 2004. Accordingly, in accordance with your <br /> letter of June 27, 2006, this proposed vapor sampling is part of the required site information <br /> needed to determine whether the subject fuel leak matter qualifies for no further action required <br /> (NFAR) classification. Groundwater-related aspects are being evaluated under a parallel <br /> sampling, testing and reporting program. <br /> The main objective of the soil vapor sampling is to evaluate the areas of highest residual impacts, <br /> particularly those within the mobile home park portion of the Site, to see if there is any significant <br /> potential health hazard/risk. A site-specific human health risk assessment (HH A) may be <br /> conducted as a follow-on task if warranted based on the vapor concentrations that are measured. <br /> Otherwise, the concentrations will simply be compared to the generic vapor-based ESLs published <br /> by the San Francisco Bay Regional Water Quality Control Board (SFBRWQCB). <br /> 707 East 11 Street, Suit 120 • Tracy, CA 95376 Page 1 of 4 <br /> 209.833.0758 • Fax 209.832.5152 <br /> wright@inreach.com Lic. #651501 A-B HazMat, C21 ice, <br /> websit http://wrightenvironmentalser ices.com <br />