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• L ti.! <br /> ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> e i, �',•., ?, Donna K.Heron,R.E.H.S. Unit Supervisors <br /> " Director 304 East Weber Avenue, Third Floor Carl Borgman,R.E.H.S. <br /> Al Olsen,R.E.H.S. Stockton, California 9$202-2708 Mike Huggins,R.E.H.S.,R.D.I. <br /> • c.. 'c • <br /> Program Manager Douglas W.Wilson,R.E.H.S. <br /> 9� kba� 8 8 Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Program <br /> ram MManager Fax: (209) 464-0138 <br /> Laurie Co R.E.H.S. Robert McClellan,R.E.H.S. <br /> Manager <br /> Mark Barcellos,R.E.H.S. <br /> PETER WALLACE JR FILE COPY <br /> 7455 EAST PASARO DRIVE <br /> SCOTTSDALE AZ 85262 <br /> RE: HESS-DUBOIS Cleaners SITE CODE: 2504 <br /> (dba: Prestige Cleaners) RO#0000282 <br /> 348 W. Harding Way CUF#1714 <br /> Stockton, CA 95204 <br /> WORK PLAN: "Additional Site Assessment Work Plan" M <br /> t4o <br /> DATED: March 21, 2003 <br /> PREPARED BY: Advanced GeoEnvironmental —Wm. Little. <br /> STATUS: Approved (with conditions noted below) <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN IH&S <br /> 25299.37,s u bd(c)(3)1: <br /> • Advance four (4) single, multi-chamber, 1.7"O.D. polyethylene casing <br /> monitoring wells (CMT) on and off site to 150 feet below ground <br /> surface to delineate the lateral and vertical extent of TPH as <br /> Stoddard Solvent originating from a release of the underground <br /> storage tanks (UST) formerly located on site and <br /> • Analyze selected soil samples for TPH as Stoddard Solvent (8015m), <br /> and VOCs and BTEX (82606) and <br /> • Submit a report of findings to EHD and, <br /> • Develop, survey wellheads, and add new monitoring wells to existing <br /> quarterly monitoring and reporting. <br /> COMMENTS AND CONDITIONS: <br /> • The placement of six inch, clamped-on, stainless steel mesh material <br /> shall extend continuously through the hydrological unit being <br /> investigated (i.e.: five foot permeable zone should have five feet of <br /> screened material) and, <br /> • Sand filter pack shall not extend greater than 1 foot below each <br /> bottom-screened interval or greater than 1 foot above the upper most <br /> screened interval per hydrological unit. (Le.: five foot screened <br /> interval shall not have more than seven feet of sand filter pack in that <br /> interval). <br />