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PUBLIC HEALTH SERVICESQU JY <br /> SAN JOAQUIN COUNTY =' <br /> a: a <br /> JOGI KHANNA M.D..M.P.H. <br /> Health Officer <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) • Stockton, California 95201 4Zi i`60`' <br /> (209) 468-3400 n <br /> F <br /> LES CALKINS <br /> LES CALKINS TRUCKING <br /> 19825 N HWY 99 JUN S 1-993 <br /> ACAMPO CA 952.20 <br /> RE: Les Calkins Trucking SITS CODE: 1633 <br /> 19501 N Hwy 99 <br /> Acampo, CA <br /> San Joaquin County Public Health Services, Environmental Health <br /> Division (PHS/EHD) has reviewed the "Workplan for Soil Remediation" <br /> submitted by Park Environmental dated May 18, 1993 and has the <br /> following comments. <br /> As stated in the "Background, Prior Site Assessment" , Section 2. 3 <br /> of the workplan, T & T Earth Services conducted a total of six soil <br /> borings in the vicinity of the tank excavation pit during the <br /> Summer of 1992. This testing confirmed contaminated soils with the <br /> following constituents in areas listed below: <br /> I. SB-1 4 feet TPH-gas 25 ppm <br /> TPH-diesel 2500 ppm <br /> SB-1 11 feet TPH-gas 49 ppm <br /> TPH-diesel 1300 ppm <br /> 2. SB-2 15 feet TPH-diesel 210 ppm <br /> 3. SB-3 10 feet TPH-diesel 1500 ppm <br /> 4. SB-4 24 feet TPH-diesel 280 ppm <br /> Confirmation that the contaminated soil evidenced in the above <br /> mentioned areas has been remediated must be provided before site <br /> closure will occur. Resampling the existing pit sidewalls and <br /> bottom will not provide this confirmation. With the amount of rain <br /> that San Joaquin County has experienced this year and the open <br /> excavation at the site the contamination may have been driven <br /> deeper below grade. <br /> Confirmation sampling may occur by further excavation (that <br /> encompasses the previous boring sample locations evidencing soil <br /> contamination) and then sampling of the sidewalls and bottom, or by <br /> drilling several soil borings around the current excavation with <br /> samples obtained at the previous boring sample depths. <br /> A Division of San Joaquin Coun y Health tare Services C� <br />