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r � <br /> �YO 23� rine,Square Dr1Ve Suite 2 <br /> Alam�Ca i id 94501 <br /> NWNTAL Tel 510 521 2684 <br /> $� LMESp INC. Fax s 10-521 5078 <br /> l 347 HETI <br /> Massachusetts <br /> 'dew York <br /> Maryland <br /> New Jersey <br /> June 9, 2000 <br /> Mr P E Copple <br /> Superintendent <br /> Central California Traction Company <br /> 2201 West Washington Street#12 <br /> Stockton, CA 95203-2942 <br /> Re. Work Plan Phase II Environmental Site Assessment for the Central California Traction <br /> Company at 1645 Cherokee Lane,Stockton, CA <br /> Dear Mr Copple <br /> Hydro-Environmental Technologies,Incorporated(HETI) is pleased to submit this work plan for a Phase I1 <br /> Environmental Site Assessment(ESA)for the Central California Traction Company(CCT)at 1645 Cherokee <br /> Lane property in Stockton, California (herein referred to as the subject property) HETI reviewed the <br /> September 1999 URS Greiner Woodward Clyde(URSGWC)final report UST Investigation, 1645 Cherokee <br /> Lane, Stockton, CA and the November 4, 1999 letter from the San Joaquin County Public Health Services, <br /> Environmental Health Division(PHS/EHD) This work plan addresses the requirements of your November 4, <br /> 1999 letter <br /> SITE LOCATION AND BACKGROUND <br /> The subject property is in Stockton,California north of the intersection of Cherokee Lane and Waterloo Road <br /> It is in T2N, R6W of the 1968 (revised 1987) Stockton West,California 7 5 minute (1 24,000) Quadrangle <br /> The property is approximately 21 feet above mean sea level (AMSL) <br /> The subject property is in an area of mixed light-industrial and commercial buildings, it is part of a property <br /> used to repair railroad engines by the CCT In January 1999,Thorpe Oil Company excavated and removed <br /> one 6,000-gallon gasoline underground storage tank(UST)and one 1,000-gallon diesel UST from the subject <br /> property One soil sample,collected from below the excavated diesel tank at 9 feet below surface grade(bsg), <br /> had 8,000 milligrams per kilogram (mg/kg) total petroleum hydrocarbons (TPH) as diesel, 0 33 mg/kg <br /> toluene, 0 740 mg/kg ethylbenzene, and 1,800 mg/kg total xylenes, benzene was below method detection <br /> limits because of matrix interference from the higher TPH as diesel concentrations <br /> In August 1999, URSGWC conducted a soil boring/ground water investigation Five borings were drilled <br /> using direct push(DP)and hollow stem auger The highest TPH as diesel concentrations(at 22,000 mg/kg)in <br /> soil were detected in samples collected from boring B-I at the 10-foot depth interval However, TPH as <br /> diesel was detected in soil samples collected from the entire soil boring to ground water Concentrations <br /> ranged from 6,000 mg/kg (at 15-feet bsg) to 2,000 mg/kg (at 40-feet bsg) Ethylbenzene and total xylenes <br /> were also detected ranging to 0 011 mg/kg and 0 061 mg/kg, respectively at 10 feet bsg <br />