ARCHIVED REPORTS XR0003300 - Laserfiche WebLink

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1.0 INTRODUCTION AND PREVIOUS WORK l The Stockton railyaid and fueling facility is Iocated at the end of Diamond Stieet in the City of Stockton, San Joaquin County, California Three underground storage tanks were removed from the facility during the period of October 29 through November 9, 1990 under permit from the San Joaquin Local Health District The permit application foi the tank removal was submitted to the San Joaquin Local Health Distiict on August 30, 1990 and an addendum to the peinntt application was subiriated oil Octobei 6, 1990 1.1 TANK REMOVAL I A 2,000-gallon undeigiound tank used foi the storage of gasoline, a 10,000-gallon undeigiound tank used foi the storage of wastewater, and a 26,000-gall011 underground tank used for the storage of diesel fuel were removed from the facility A dispenser and piping was removed from above tine gasoline tank, and a remote fill line was iemoved adjacent totile diesel fuel tank A wastewater line fiom the fueling platform to the wastewatei tank was lett in place pending integrity testing It the line passes the test, it will be used as part of a new wastewatei tieatment system foi the fueling platfottn if the line tails, the line may be . ien-ioved and the soils tested below the line every 20 feet 2 Soil samples wete collected following the ieinoval of the undeigiound tanks The soil sampling was witnessed by Mi Charles Hunt from San Joaquin County Public Health Services ,Sod samples wete collected appioxiinately 2 feet below the torinei tank bottom Two soil samples weie collected fiom below the formet 2,000-gallon gasoline tank, 2 soil samples were collected from below the torinei 10,000-gallon wastewater tank, and 3 soil samples weie collected tiom below the foimer 26,000-gallon diesel tank Figure 1 shows the approximate location of the soil samples, and Table 1 shows the laboi atoi y Iesialts tai the soil samples 3 The soil samples fiom below the former 2,000-gallon gasoline tank and from Stockpile 1 were analyzed for total petroleum hydrocarbons as gasoline by EPA Method 8015, benzene, toluene, ethylbenzen- and xylenes (BTEX) by EPA Method 8020, tetraethyl lead, and ethylene dibromide by EPA Method 504 Samples ST-lA and ST-111 weie repotted to lcontain,14'rng/kg total petroleum hydrocarbons as gasoline BTEX, tetraethyl lead and • ethylene dibiornide were reported below laboratory detection luruts of 0 0024, 6, and 0 0006 mg/kg, respectively ENVIRONMENTAL SOLUTIONS