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Phase 1 Environmental Site Assessment Neighborhoods D,K,L,and Town Center,Mountain House,California Page 1 i south. According to the Summa Re ort-Former Shell Central Valley Crude Line' s-Vicinity of Mountain. House Parkway and Mascot Boulevard dated March 15, 2004, by Clayton Group Services, impacted soil and groundwater were noted on the adjoining northwestern property in June 2003. Soil and groundwater testing activities were performed, identifying areas of petroleum hydrocarbon contamination. One of these areas of soil contamination is Iocated on the adjoining western property with laboratory analytical results indicating total petroleum hydrocarbons quantified as diesel (TPH-d) at 3,600 milligrams per kilogram (mg/kg) and total petroleum hydrocarbons quantified as crude oil (TPH-cr) at 12,000 mg/kg. Further investigation is being performed under Shell's administration along this former pipeline route. According to this current information and on-going remediation status, this former pipeline alignment appears to. be a potential risk to the Site property. 4.2.2 San Joaquin County Office of Emergency Services The San Joaquin County Office of Emergency Services (OES) did not have Hazardous Materials Management Plans (HMM P) and Chemical Inventories (CI) for the Site or for any governmental database locations located.within '/4-mile of the Site.However, an HMMP and Cl were available for the following: • Mountain House Community Service District's (CSD) WWTP located at 1:7300 W. Bethany Road has the following chemical inventory: aluminum sulfate, diesel, hydrochloric acid, polymer, sodium bisulfite, and sodium hypochlorite. • Rankins Ag, Inc. located at 17400 W. Bethany Road has the following chemical inventory: 2,4- D, diesel, furadan, gasoline, oil,paraquat, and waste oil. An Incident Report received from OES is listed below: • On December 22, 1998, OES responded to a request for inspection of an abandoned drug laboratory at 18601 W. Grant Line Road (residence, Neighborhood D). The Tracy Rural Fire Department provided decontamination assistance. Drug lab wastes (corrosive and flammable) were removed and sampling was done at this location. The Department of Toxic Substance Control (DTSC) and the California State Warning Center were notified. A DTSC clean-up contractor removed the involved materials from the premises. This location does not appear to be a potential risk to the Site property as it appears to have been cleaned up. I 4.2.3 San Joaquin County Agricultural Commissioner's Office The name of the lessee (Frank Arnaudo) and the locations of the Site properties were submitted to the San Joaquin County Agricultural Commissioner's Office (SJCACO), and the non-confidential portions of their files were researched. The SJCACO maintains Pesticide Use Reports and Restricted Materials Permits (materials use permits and reports) for only five years. Thus, it is possible pesticides could have been applied to the Site in the past and/or for a longer period of time. Materials use permits and reports are designated by geographic location and user's name. When a user has multiple crops and/or locations, +' all of the restricted materials are consolidated on a single permit.The chemicals identified in the materials use permits and reports are listed in Table 1. Copies of the Pesticide Use Reports and Restricted Materials Permits are located in Appendix E. It must be noted that not all of the chemicals listed in Table I may have been applied to the Site properties. 4 i1� CONDOR