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k 6. December 23,2005 NOA Project Number: E05150A One set of three pole-mounted transformers was observed along the eastern property boundary. No blue PCB-free or silver retrofit stickers were observed. The transformers were rusty and appeared old. No stains were observed on or around the transformers to indicate leakage. M ` Surrounding properties were surveyed at the time of the site reconnaissance. To the north of the subject property were single-family residences.To the south and east was agricultural land with rural residences. To the west was uncultivated agricultural land with farm structures and a rural residence. A domestic ` well was observed on the adjacent property to the west which appeared to be supplying water to the barn on the subject property. Several 55-gallon waste oil-type drums were observed along the eastern side of the barn to the immediate west. Minor oil stains were observed in the driveway and the vicinity 6 of the drums to the west j 3.1.8 Pacific Gas&Electeic L• Ms. Linda Harkins of Stockton PG&E has stated that the only way to determine the PCB content of transformers without blue PCB-free or silver retrofit stickers is to have them tested, a service which PG&E will provide for a charge.tb I 3.L9 Phase I Environmental Site Assessment L NOA prepared a Phase I Environmental Site Assessment (Phase I) on the subject property for Kemp Land Company concurrently with the preparation of this report. The Phase I identified three additional sources of contamination not identified by the scope of this investigation: L The address of 5055 East Main Street appears on the HIST UST database of historical . underground storage tanks for a 550-gallon regular gasoline tank installed by Victor Rolleri in 1957. Based on investigation conducted for the adjacent property to the west,the tank appears j to have been located on the subject property and has been discussed above. • Marley Cooling Tower Company,located approximately one-half mile north-northwest of the subject property,has contaminated groundwater in the area with total chromium and hexavalent L chromium. According to Dudek&Associates, hexavalent chromium has been detected in a monitoring well located in the Main Street roadway directly south of the subject property at 9.5 parts per billion (ppb) and in a domestic well to the south of this at 0.7 ppb during the most L recent sampling event." L `` t6Personal Communication,March 5,2004. "Dudek&Associates,Inc.,2005,Semi-Annual Groundwater Monitoring and Performance Monitoring,Marley LCooling Technologies Remedial Wellfield,Stockton,California. II L 4