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I y • <br /> i <br /> San Joaquin County DIRECTOR <br /> Donna Heran,REHS <br /> Environmental Health Department <br /> �opa <br /> ._Y ..co r ASSISTANT DIRECTOR <br /> 600 East Main Street Laurie Cotulla, REHS <br /> Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> Carl Borgman,REHS <br /> Mike Huggins, RENS,RDI <br /> C4`i F 60ij;P Website: www.sjgov.org/ehd Margaret Lagorio,REHS <br /> Phone: (209) 468-3420 Robert McClellon,REHS <br /> Fax: (209) 464-0138 Jeff Carruesco,REHS,RDI <br /> Kasey Foley, REHS <br /> 23 January 2009 <br /> Ken Gillies <br /> Gillies Trucking <br /> P O BOX 8303 <br /> Stockton CA 95208 <br /> Subject: Gillies Trucking <br /> 3931 Newton Road <br /> Stockton, CA 95205 <br /> The San Joaquin County Environmental Health Department (EHD), at your request, met <br /> with you, Randy Gillies and your consultant, Stephen Muir of Stephen G. Muir, <br /> Consulting Geologist and Geophysicist (Muir) on 16 January 2009 to discuss your site <br /> status and the general criteria required to move your site toward regulatory closure. <br /> Margaret Lagorio and Nuel Henderson represented the EHD at the meeting. <br /> Total petroleum hydrocarbons quantified as diesel (TPH-d) is the primary contaminant of <br /> concern on your site and is being monitored in groundwater; minor total petroleum <br /> hydrocarbons quantified as gasoline (TPH-g) and benzene, toluene, ethylbenzene and <br /> total xylenes (BTEX), methyl tert-butyl ether (MTBE) and tertiary butyl alcohol (TBA) has <br /> been encountered locally on your site, but is not of significant concern and is not <br /> currently being monitored. <br /> Soil impacted by TPH-d has been delineated vertically by boring GT-11, advanced in the <br /> former underground storage tank (UST) pit, and extends to depths between 86 and 91 <br /> feet below surface grade (bsg), although impacted soil may extend deeper at the GT-22 <br /> location where soil is intensely impacted to total depth at 70 feet bsg. Impacted soil is <br /> delineated laterally southward by GT-14 and GT-9; southwestward by GT-24, westward <br /> by GT-7 and GT-13, northwestward by GT-5, northward by GT-12, northeastward by <br /> GT-20, eastward by GT-23, and southeastward by GT-28 and GT-30. Your previous <br /> consultant estimated that approximately 42,500 pounds of TPH-d remains in the soil on <br /> your site. <br /> Groundwater impacted by TPH-d occurs in four sand units, from shallowest to deepest <br /> designated the Modesto, First Riverbank, Second Riverbank and Third Riverbank and is <br /> being monitored in 28 monitoring wells. The Modesto is monitored by one well, often dry, <br /> the First Riverbank by 12 wells, the Second Riverbank by 8 wells and the Third <br /> Riverbank by 7 wells. The zones of primary concern are the Modesto, when saturated, <br /> and the First Riverbank. <br /> Meeting Summary Directive Letter 0109 <br />