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M �� CONDOR EARTH TECHNOLOGIES INC 188 Frank West Circle, Suite I Stockton, CA 95206 MAY 2 7 2008 CEIIVkD Phone 209.234.0518 FAX 209.234.0538 CONDOR ENVIRONMENT HEALTH www.condorearth.com ' HEA HOMES qfxtv,April 25, 2008 LMr. David Sargent S'S�q y�MFS Shea Homes Mountain House,LLC HFj� L 2580 Shea Center Drive HOr�Es Livermore, CA 94550 Re: Phase I Environmental Site Assessment Update Report for Neighborhood I and Neighborhood J,Mountain House,California Condor Project No.4601M2 LDear Mr. Sargent: Thitisa eport o findings for the Phase I Environmental Site Assessment (ESA) update for L Neids I wit Assessor's Parcel Numbers(APNs 209-030 02, -11, -12, -18, and 209-020-23 and- 24) s 209 030-04 and 209-040-02), and portions of APNs 209-030-03, -05, and -23 in both NeiJ (Site) (Figures 1 through 3, Attachment A). Condor Earth Technologies, hic. (Condor) is submitting this report in order to update the Neighborhood I & Neighborhood J Phase I L Environmental Site Assessment Report and a Partial Response to Mountain House Master Plan Chapter Six, Mountain House, San Joaquin County, California, both dated September 17, 2004 and both prepared i by Condor. The Phase I ESA was performed in accordance with the guidelines set forth in Practice E L 1527-00, Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process, published in May 1993 (Revised 2000) by the American Society for Testing and Materials (ASTM) and in accordance with the prevailing standard of care for completing such assessments in LCalifornia at the time of the site visits. This update report was conducted in accordance with the guidelines set forth in ASTM Practice E 1527-05, published November, 2005, which is the most recent Phase I ESA Standard published by ASTM. This report includes a summary of the Phase I ESA Lconclusions and a description of changes in both environmental database searches and to Site conditions. SUMMARY OF PHASE I ESA LNeighborhoods I & J (Site) comprise of approxima 428 328 a es, both under development for residential purposes. Condor determined the follovn zed ronmental conditions associated with the Site: • The historical application of agricultural chemicals for agricultural purposes on both LXbijft9rhood I and Neighborhood J. Reconnaissance soil sampling and laboratory analyses in both Neikhborhoods indicated no detectable pestici a or herbicides. • Oil stainin on the northwestern comer of barn #4 and the surrounding soil and the soil staining L uth of th pump house(APN 209-030-03)-Neighborhood L _ • The nce of an approx dtrdre -containing AST and the esence of 7 containing drums on APN 209- 0-18 and the pr ence of an approximat 500-gallon dies - containing AST on APN 209-03 -0 ood L L L