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i <br /> 1.0 INTRODUCTION/HISTORY operated fire station, <br /> The subject property is a City of 5tocf:ton <br /> located in west central Stockton (Figure I) • <br /> Stockton Service Station Equipment Company <br /> samples at the site during the removal <br /> On October z, 198$' gallon diesel) . Two <br /> personnel collected soil storage tank ( �-554 g and one from <br /> of one underground (u/9) beneath product piping <br /> samples were collected from mer u/g storage 'tank. <br /> native soil beneath the for <br /> indicated that elevated con- <br /> Laboratory analysis of tetroleum shy <br /> hydrocarbon contaminants were <br /> centrations of certain P enable 1) <br /> present in soils beneath the former t'n}cit was enlarged and deep- <br /> tember 7, 1990, the former tank p t at complete source <br /> On September ui ment in an attempt <br /> Grp general Supervision <br /> erred with excavation eq P submitted by, <br /> removal, Excavation twas <br /> heovorkp�an npreparedwate Work personnel <br /> of, and according tation Equipment Company. <br /> Stockton Service Sulting c pacitY. <br /> inacons <br /> were present Pu <br /> and <br /> proceeded until site attributes including P <br /> Excavation p hfares prevented further enlargement of the pit. <br /> private thorough WaterWork personnel colt floor ofected 5 the <br /> Subsequent to excavation, <br /> and one sample from the <br /> samples from the pit <br /> I) • <br /> pit (Soil Sampling indi- <br /> 'Pable 1 & Appendix I) <br /> Laboratory analysis of the samples ( sent in soils <br /> cate that petroleum hydrocarbon contaminants are present <br /> and flocr.- <br /> stil <br /> still in place on the south end east sides of the p <br /> ing the pit. uently backfilled <br /> considerations the pit was subsequently <br /> � Due to safety <br /> rade. <br /> with clean engineered material and compacted tO g and are <br /> excavation were stockpiled on-site <br /> Sails removed during rated <br /> t <br /> under auhorization of the San Joaquin <br /> currently being District. <br /> County Air Pollution Control the <br /> Based on Vhetory results, further investigation of ater contamination is neces- <br /> extent of soil and orulate possible grounremedial action alternatives. <br /> sary in order to background infor- <br /> Report is intended to provide further <br /> to the site; to prepare a workplan for <br /> This Preliminary <br /> oration pertinent soil and groundwater contamihe <br /> acceptable methodologies whereby <br /> investigation of the extent of <br /> tion; and to establish a . <br /> workplan can be imp <br /> __ 1 <br />