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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY Unit Supervisors <br /> Donna K.Heran,R.E.H.S. Carl Borgman,R.E.H.S. <br /> 304 East Weber Avenue, Third Floor <br /> V). Director <br /> Mike Huggins,R.E.H.S.,R.D.J. <br /> Al Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson, R.E.H.S. <br /> Program Manag -3420 <br /> h I <br /> ,, ger <br /> Telephone: (209) 468 Margaret Lagorio,R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. Fax: (209) 464-0138 Robert McClellon,R.E.H.S. <br /> Program Manager Mark Barcellos,R.E.H.S. <br /> FILE COPY <br /> BRIAN KEEGAN <br /> UNIFIRST CORPORATION 1j. <br /> 68 JONSPIN RD <br /> F" <br /> WILIMINGTON MA 01887-1086 , <br /> RE: Unifirst Corporation Facility RO/Site Code: 1549 <br /> 819 N. Hunter Street SWRCB-CUF#: 018305 <br /> Stockton, CA. 95202 <br /> WORKPLAN: Revised Work Plan — Underground Storage Tank (UST) <br /> Investigation <br /> DATED: March 17, 2005 <br /> PREPARED BY: URS — Erik Skov, R.G. <br /> STATUS: APPROVED with conditions noted below. <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN [Health & <br /> Safety Code (H&S) Section 25296.1 0(c)(3)1: <br /> • Install four (4) 2-inch PVC monitoring wells onsite to evaluate ground <br /> water impact from the recently discovered 'unknown' UST and, <br /> • Collect and analyze selected soil samples for TPI-Ig & TPI-ld, VOCs, <br /> semi-VOCs, Oil & Grease, metals, and PCBs as required by SJCEHD <br /> and, <br /> • Survey in new wells and quarterly monitor and sample for one year, <br /> submit Quarterly Monitoring Report (QMR), and submit the report of <br /> findings of the monitoring well installations to SJCEHD. <br /> COMMENTS AND CONDITIONS: <br /> • The proposal calls for only submitting soil samples from the new <br /> monitoring well 'in' the former UST pit area for laboratory analysis. <br /> Although previous subsurface soil data exists for this site, SJCEHD <br /> cautions that delineation conclusions that are required in the report <br /> of findings for this phase that are not supported by laboratory data <br /> may not be accepted and further investigation in these areas will be <br /> required. An adequate number of soil samples should be collected <br /> and analyzed during this phase to support all conclusions for lateral <br /> and vertical delineation. <br />