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k`■ KLEINFELDER i i ATTACHMENT A REVISED PROPOSAL/SCOPE OF WORK PRE-ABANDONMENT UNDERGROUND STORAGE TANK SOIL ASSESSMENT (129000 GALLON SC-250 AND 129000 GALLON SS-111) GRANITE CONSTRUCTION COMPANY f 10500 SOUTH HARLAN ROAD I FRENCH CAMP, CALIFORNIA 95231 INTRODUCTION Kleinfelder is pleased to present this revised proposal for Granite Construction Company. This proposal was developed after discussions with Mr. Hop Esseck of Granite Construction Company, using Kleinfelder's current understanding of the site conditions and is a preliminary understanding of the projects desires and requirements'. We prepared this proposal based on information usually requested in a workplan by the San Joaquin County Public Health Services Department Environmental Health Division (PHS/EHD)and the State of California Regional Water Quality Control Board (RWQCB). Kleinfelder is committed to providing a high level of service to its clients, commensurate with their wants and needs. If a portion of this proposal does not meet the needs of the client, or if those needs have changed, Kleinfelder stands ready to consider appropriate modifications, subject to the standards of care to which we adhere as professionals. Modifications such as changes in scope, methodology, scheduling, and contract terms and conditions may result in changes to the risks assumed by the client, as well as adjustments to our fees. We look forward to the opportunity to serve you. i BACKGROUND r Granite Construction Company operates a construction yard at 10500 South Harlan Road in k French Camp, California. The French Camp facility includes liquid asphalt cutback and I emulsion storage in underground storage tanks (USTs). Both underground storage tanks have a reported capacity of 12,000 gallons. The cutback and emulsion liquids consist of a mixture of petroleum hydrocarbons and distillates. Specifically, the cutback liquid is called "SC Cutback Asphalt; SC-250" and the emulsion is called "Asphalt Emulsion; SS-1H". Both products are manufactured by Huntway Refining Company of Wilmington, California. i In accordance with the requests from the San Joaquin County Local Health District (SJLHD) to the Granite Construction Co., Kleinfelder conducted a soil assessment beneath the SC-250 tank v for the presence of petroleum hydrocarbon constituents in 1989. At that time Kleinfelder advanced two (2) angled borings at 45 degrees from the surface to obtain soil samples beneath the tank. Based on the analytical data results it was Kleinfelder's recommendation that no additional 20-YP8-262/2018P285r/2018C595 Page A-I Copyright 1998,Klcinfelder,Inc. November 4, 1998 f