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Road. Several irrigation vent and valve boxes are located along Grant Line Road most notably at the northeast comer of the Hansen Road and Mountain House Parkway intersections. Power lines run along both sides of Grant Line Road including one ground-mounted transformer and seven pole-mounted transformers along its length. The adjacent ground area shows signs of buried fiber optic lines along both sides of Grant Line Road. An unlabeled green box presumed to be associated with the fiber optic lines is located on the north shoulder just west of the _ California Aqueduct.The Delta Mendota Canal extends northwest to southeast through the western portion of Grant Line Road. Small irrigation canals pass under Grant Line Road 300-feet west of South Hansen Road. Signs for one petroleum and two gas pipelines indicate the pipelines cross under Grant Line Road just east of the Alameda-San Joaquin County line. RESULTS OF THE HISTORICAL REVIEW The historical review included title documents,historical topographic maps, fire insurance maps,and historical aerial photographs. No evidence of past hazardous materials facilities,such as gas stations, industrial facilities, or waste dumps,was identified on the site during the historical review.While the project site does not have a history of supporting hazardous materials facilities,hazardous materials have been used at the site and several incidents involving public safety and hazardous materials have occurred on and in the vicinity of the site, as described below. — Land uses and practices at the project site and off-site infrastructure locations which may have public safety and hazardous materials issues include: _ Farmland where pesticides have been used over an extended period of time; Two dairies where animal waste is generated and stored; Pre-1980s structures that may contain asbestos or lead-based paint; Overhead high-voltage electrical transmission lines and transformers that may emit EMFs and may contain polychlorinated biphenyls(PCBs); Natural gas pipelines and a crude oil pipeline that may represent a leak or explosion hazard; and Both above-ground storage tanks(ASTs) and underground storage tanks (USTs)that may contain hazardous materials and fuels which could have the potential to contaminate soils. Agricultural activity has occurred on the site since the 1850s,and pesticides,herbicides,fuels, and chemicals related to agricultural operations have been used and stored at the site over an extended period of time.Pesticides such as paraquat,phenoxy,methomyl,amitrole,and chloropicrin are believed to have been used at the site. The half-lives of these pesticides ranges from several hours to 14 days,but paraquat has a half-life of more than 1,000 days and is typically highly persistent in surface soils. — The two existing dairies on the site(Teixeira Dairy north of Grant Line Road,and Lucky J Dairy south of Grant Line Road)contain waste disposal ponds. In 1999,California took legal action against the Lucky J Dairy.The action was related to violations of the Clean Water Act associated with the discharge of animal waste to surface waters. As a result of the legal action,the dairy came into compliance and was still compliant in 2003. PG&E records indicate there have been no leaks or ruptures of natural gas pipelines in the vicinity of the project site since the pipelines where installed.However,on December 4, 2003,the 18-inch Chevron crude oil pipeline that bisects the project site was accidentally struck by a tractor working on farmland on a parcel directly southeast of the project site.Approximately 21,000 gallons(500 barrels)of crude oil were released.The area of contaminated soil is approximately 2.2 acres,extending north, east,west and south of the pipeline(Kleinfelder and Siegfried Engineering 2003). Based upon aerial photos taken of the rupture,it appears the largest amount of EDAW College Park at Mountain House Specific Plan III Draft EIR Public Health and Safety 4.9-2 San Joaquin County