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r . Boyett Petroleum • 419 South Main Street Manteca, California Final Report of Findings Lateral Extent of Groundwater Contamination L 0 Project Identification This project was developed to explore the lateral migration of the groundwater contamination plume at the Boyett Petroleum fueling facility, located at 419 South Main Street, Manteca, California. The results of this investigation have been used to further define the groundwater contamination plume and to determine an effective mitigation strategy. 2.0 Site Description and History �• SC&D Boyett Petroleum is located in Manteca (Figure 1). The property is identified as Parcel 23 in Book 9, on Map 2 of the Baccilieri Park Addition, The Assessors Parcel Number (APN) is 219-38-23 in San Joaquin County. The subject parcel has a physical 1 address known as 419 South Main Street, Manteca, CA(Figure 2). On November 20, 1996 WHF, Inc., under the direction of Mr. Robert McClellon of San Joaquin County Public Health Service, Environmental Health Division (SJC PHS/EHD), collected one (1) soil sample from beneath each of the three (3) existing dispensers at approximately 24 inches underlying the dispenser piping. Samples were collected employing the use of a hand driven sampler with brass sleeves. After sample collection the sleeve was sealed, labeled, logged on a Chain of Custody and ' collected in an ice chest with Blue Ice(D to await transport to a certified laboratory. On November 21, 1996 WET, Inc. under the direction of Mr. Robert McClellon of San Joaquin County Environmental Health, collected four (4) discrete soil samples in brass sleeves to characterize the stockpiled soils from the demolition and retrofit activities ' conducted at this site. The four (4) sleeves collected were composited into two (2) soil samples for analysis at the laboratory. Those two (2) samples are representative of the approximately 44 cubic yards of material stockpiled. All samples collected during this avanf �arvra ca�1a� lni�oln� 1nn..n.i .. .. /`1,... O f%C` .3-tV- 1�. and ---I--3 _s_ _ •.1 •• •+__� ...+_.+ .vu=v.., =asaivavw, ays vu via w V11i4121 VL �.ri1JLVUy a11U LUIV111 4 14G U11G.1'L W1Ln Blue Ice® to await transportation to the certified laboratory.