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Advanced <br /> mental, Inc. --- ' <br /> GeoEnviron -RECS <br /> 26 September 2002 SEP 3 202 <br /> AGE-NC Project No. 02-0946 <br /> ENVIR MmEw <br /> ,T�SERVICES N <br /> Ms. Margaret Lagorio PER <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95201 <br /> Subject: Excavation Work Plan <br /> Proposed El Dorado Apartments Development <br /> Stockton, California <br /> Dear Ms. Lagorio: <br /> At the request of ParkCrest Development,Advanced GeoEnvironmental, Inc. (AGE) has prepared <br /> this work plan for excavation of debris and petroleum hydrocarbon-impacted soil at the proposed <br /> El Dorado Apartments Development project located on South El Dorado Street,APNs 167-070-02 <br /> and-03,in Stockton,California.The location of the site is illustrated on Figure 1.A plan of the site <br /> is illustrated on Figure 2. <br /> INTRODUCTIONBACKGROUND <br /> The subject property is located in the south-central portion of the City of Stockton, San Joaquin <br /> County, north of the intersection of South El Dorado Street and California Street. Land use of the <br /> surrounding properties is recreational(McKinley Park),residential and commercial.The subject site <br /> is the former location of a glass production facility,originally decommissioned sometime during the <br /> early 1970s. <br /> Previous site assessments on the property include: <br /> • February 2002 - A geotechnical investigation was conducted at the site by Raney <br /> Geotechnical Inc(RGI).During the course of the investigation, soil samples collected from <br /> two borings (B4 and B5)were noted as having a"gasoline odor". <br /> • May 2002 -Five soil borings (B-1 through B-5)were advanced at the site by Construction <br /> Testing & Engineering, Inc. (CTE) to determine the nature and extent of soil possibly <br /> impacted by petroleum hydrocarbons. Soil samples collected from three of the five soil <br /> borings (B-1, B-2 and B-5) contained concentrations of total petroleum hydrocarbons <br /> quantified as gasoline (TPH-g), diesel (TPH-d) and/or motor oil (TPH-mo). The highest <br /> detected concentrations were found in soil samples collected from borings B-2 and B-5 at <br /> depths of 10 and 15 feet below surface grade (bsg), respectively; however, additional <br /> 837 Shaw Road,Stockton, California 95215 <br /> Telephone (209) 467-1006 FAX(209) 467-1118 <br />