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LC CORNERSTONE • • EARTH GROUP WORK PLAN Presented below is a summary of the site history and the proposed scope of work related to the drilling permit application. Based on information obtained during out Phase I w environmental site assessment, the site likely was undeveloped land or used for agricultural purposes prior to 1942. A government owned magnesium .» plant was constructed at the Site in 1942 to support World War II efforts. The plant was operated by Permanente Metals Corporation (aka, Kaiser u Magnesium Company) until 1944. It was reactivated ,. between 1951 and 1953 to support Korean War efforts. During the mid-1950s, a portion of the facility was leased by the government to Western Pyromet Corporation for titanium production; it appears that mainly experimental pilot testing work was performed by Western Pyromet. In 1960, the Site was purchased from the government by Max Rouse & Sons. During the early 1960s, it was occupied by Buyers Bargain Barn and used as an apparent flea market for retail items. Zoecon (a division of Occidental Chemical) reportedly used the property for fertilizer storage and bagging in the 1970s to the early 1980s. Subsequent tenants appear to have included Biorecycling Technologies, Inc. (BTI)and Weaver Industries who reportedly conducted green waste recycling and mulching operations at the Site. Mr. Nasser Massih reportedly purchased the Site in 2000. The remaining magnesium plant buildings were demolished in 2002. Several building pads subsequently were rough graded and various below ground utilities, associated utility vaults, and a wood-framed fire pump shed were installed in preparation for planned development; a storm water detention pond and two associated concrete-block sheds also were constructed at the northwest corner of the Site. • • • • - Pre-Field Activities We will contact Underground Service Alert (USA)to notify them of the approximate drilling/potholing locations. Please note that USA will not locate utilities on private property. Therefore, our fees include the use of a private utility locator to help locate utilities, if any, in the exploration area. We are not responsible for damage to underground structures. Ground Water Quality Evaluation Our field geologist or engineer will direct a subsurface investigation and advance seven exploratory borings to an approximate depth of 25 feet. The investigation will be conducted using a truck-mounted drill rig equipped with direct push technology. The primary goal of this 199-1-2 Page 1 11/28/2007