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PHASE II ENVIRONMENTAL SITE ASSESSMENT
<br /> C REPORT
<br /> PROPOSED NEIGHBORHOOD G SITE
<br /> PORTIONS OF ASSESSOR PARCELS
<br /> 209-050-06,209-050-02,209-040-12,AND 209-040-13
<br /> MOUNTAIN HOUSE,SAN JOAQUIN COUNTY
<br /> CALIFORNIA
<br /> July 9,2002
<br /> 1.0 INTRODUCTION
<br /> Condor Earth Technologies, Inc. (Condor) conducted a Phase II Environmental Site Assessment (Phase 11)
<br /> for the proposed Neighborhood G site located in Mountain House, San Joaquin County, California(Figures
<br /> 1 and 2). The Phase II was conducted at the request of Mr. Eric Teed-Bose of Trimark Communities in
<br /> response to the mitigation measure described in the Mountain House Environmental Impact Report dated
<br /> September 1994 (Appendix C, page C-32, Objective 2,Implementation Item [a]).
<br /> The work described in this report was conducted in general accordance with the Phase II Environmental
<br /> Site Assessment Work Plan, prepared by Condor,dated September 25, 2001. The work plan was developed
<br /> using information contained in the California Environmental Protection Agency Department of Toxic
<br /> Substance Control (DTSC) Preliminary Endangerment Assessment Guidance Manual, dated January 1994
<br /> (Second Printing, June 1999), and Interim Guidance for Sampling Agricultural Soils, prepared by Mr. Brad
<br /> f Parsons of the DTSC, dated June 2000. The primary objectives of the work described in this report were to
<br /> evaluate potential contamination issues and contaminant exposure levels associated with historical land use
<br /> practices at the site. This report includes site background information, a description of the field sampling
<br /> procedures and analytical methods used to conduct the work, a description of the laboratory analytical
<br /> results,and conclusions.
<br /> 2.0 SITE BACKGROUND
<br /> The site is located approximately one-half mile west of the intersection of Mountain House Parkway and
<br /> Byron Road in San Joaquin County, northwest of Tracy, California (Figure 2). The site consists of
<br /> approximately 240 acres of generally flat land and comprises portions of Assessor Parcel Numbers (APNs)
<br /> 209-040-12, 209-040-13, 209-050-02, and 209-050-06 in Sections 4, 5, 8 and 9, Township 2 South, Range
<br /> 4 East of the Clifton Court Forebay, California Quadrangle, 7.5 minute, United States Geological Survey
<br /> (USGS) Topographic Map, dated 1978. The site is surrounded by agricultural land. Vegetative cover
<br /> consisting of alfalfa and corn was present at the site during soil sampling activities conducted on September
<br /> 28,2001.The site is currently owned by Trimark Communities.
<br /> A Phase I Environmental Site Assessment Report, dated October 29, 2001, was prepared for the site by
<br /> Condor. According to information contained in the above referenced document, the site has historically
<br /> been used to cultivate alfalfa, corn sugar beets, tomatoes, and wheat. Aerial photographs reviewed by
<br /> Condor dated 1957, 1982, and 1994 indicate that land use of the site and surrounding area was entirely
<br /> agricultural. A single-lane dirt road traverses the site from north to south through the center of the site. An
<br /> unlined irrigation canal runs from the northwest corner of the site boundary through the site to the eastern
<br /> site boundary, flowing in a southeasterly direction. Two single-lane dirt roads follow the irrigation canal,
<br /> one on each side of the canal. Information obtained from the San Joaquin County Agricultural
<br /> is CONDOR
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