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Phase I Environmental Site Assessment
<br /> Proposed Mountain House Preschool and Multi-Purpose Buildings
<br /> 54 West Conejo Court,Mountain House,CA
<br /> Page 4
<br /> 2.4 DESCRIPTIONS OF STRUCTURES,ROADS, OTHER IMPROVEMENTS ON SITE
<br /> The Site has no structures or roads.
<br /> 2.5 CURRENT USES OF THE ADJOINING PROPERTIES
<br /> Residential development is complete on the western adjoining property,northern adjoining property across
<br /> West Conejo Court, and the southern adjoining property across Mustang Way. The eastern adjoining
<br /> property across Central Parkway is vacant.
<br /> 3.0 USER PROVIDED INFORMATION
<br /> 3.1 ENVIRONMENTAL LIENS OR ACTIVITY AND USE LIMITATIONS
<br /> An environmental lien is a charge, security, or encumbrance upon title to a property to secure the payment
<br /> of a cost,damage,debt,obligation,or duty arising out of response actions,cleanup,or other remediation of
<br /> hazardous substances or petroleum products upon a property. The Client indicated that no environmental
<br /> liens have been placed on the Site property (User Questionnaire, Appendix E). No evidence of any
<br /> environmental lien placed on the Site property was revealed in the course of this investigation.
<br /> 3.2 SPECIALIZED KNOWLEDGE AND PREVIOUS ASSESSMENTS
<br /> Condor is, and has been, involved with environmental assessment work at the Mountain House town site
<br /> for the past 20 years.Several Mountain House related reports by Condor and others are noted within Section
<br /> 11.0 of this report. Condor conducted a Phase I ESA on the entire neighborhood including the Site in 2001
<br /> as documented in the Phase I Environmental Site Assessment Report, Neighborhood E, 20001, 20043,
<br /> 20501, and 20601 Mountain House Parkway, Portions of Assessor's Parcels 209-050-06, 209-050-02,
<br /> 209-050-07, and 209-050-04, Tracy, San Joaquin County, California, dated October 25, 2001. One
<br /> recognized environmental condition was identified for the Site:
<br /> 1. The former agricultural use of the Site possibly having resulted in residual pesticides and herbicides
<br /> in soil.
<br /> Condor conducted an assessment for agricultural chemicals on the Site and entire neighborhood in 2002 as
<br /> documented in the Phase II Environmental Site Assessment Report, Proposed Neighborhood E, Portions
<br /> of Assessor's Parcels 209-050-06, 209-050-02, 209-050-07, and 209-050-04, Mountain House, San
<br /> Joaquin County, California,dated July 3,2002.The soil samples collected from the Site and Neighborhood
<br /> E did not contain detectable residual pesticides or herbicides above the laboratory reporting limits,and the
<br /> laboratory reporting limits were well below sensitive land use screening levels.
<br /> The significant database listings researched in Section 4.0 are summarized below as specialized knowledge
<br /> by Condor.
<br /> 3.2.1 SUMMARY OF SHELL PIPELINE INVESTIGATION AND REMEDIATION
<br /> The following describes activities related to remediation of the Shell Pipeline alignment located>1,200 feet
<br /> southwest of the Site. None of the soil or groundwater contamination associated with the Shell Pipeline
<br /> alignment poses a risk to the Site due to distance and regulatory status.
<br /> In the early 20t1i century, Shell operated twin crude oil pipelines that transected Mountain House
<br /> Neighborhoods E, C, D, and B. The two pipelines were 8 and 10-inches in diameter, were parallel and
<br /> within a few feet of each other, were buried four to five feet deep, and were partially removed during the
<br /> 1960s. The pipelines leaked in certain areas,releasing petroleum hydrocarbons (crude oil and diesel range
<br /> iia CONDOR
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