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Marl-21-01- 04: 09P P_02 <br /> KIEINEELDER <br /> ATTACHMENT A <br /> SCOPE OF WORK <br /> Limited Soil Assesstlnent <br /> Septic System(Leachfield <br /> Lovelace Road Transfer Facility <br /> Stocwkton,California <br /> 20-YP1.503 <br /> March 15,2001 <br /> INTRODUCTION <br /> Kleinfelder is pleased to present this Proposal to San Joaquin County Department of Public <br /> Works (SJCDPW), Solid Waste Division. This proposal was developed based upon our current <br /> understanding of site conditions, previous telephone conversations, and the site meeting on <br /> March 13, 2001, which included Mr. Dan Johnson and Mr. Najcc Zarif of San Joaquin County <br /> Department of Public Works_ This Proposal is a preliminary understanding of San Joaquin <br /> County public Works Department's desires. Kleinfelder is committed to providing quality <br /> service to our clients, commensurate with their wants, needs and desired level of risk. If a <br /> portion of this Proposal does not meet your needs, or if those needs have changed, Kleinfelder <br /> will consider appropriate modifications subject to the standards of care to which we adhere as <br /> professionals. Modifications such as changes in scope, methodology, scheduling, and contract <br /> terms may result in changes to the risks assumed by you our client as well as adjustments to our <br /> fees. <br /> BACKGROUND <br /> Kleinfelder was contacted to provide this cost estimate/scope of work to assess the subsurface <br /> soils within the leach field near the truck wash facility heated at the San Joaquin County <br /> Lovelace Road Transfer Station. The assessment was requested in response to a release of <br /> petroleum hydrocarbons into the septic system and a subsequent"Notice to Abate" from the San <br /> Joaquin County Public Health Services Environmental Health Division (PHSIE>FiD). it is <br /> Kleinfelder's understanding the release occurred in January 2001 from a faulty operation of a 3- <br /> stage watts/oil separator at the truck wash facility that empties into the septic system. <br /> On January 25, 2001, according to the PHS/EHD Notice to Abate, the septic tank was pumped <br /> and sampled. The results of the sampling showed concentrations of total purgeable petroleum <br /> hydrocarbons ars gasoline (TPH-g) of 8 parts per million (ppm), and total extractable petroleum <br /> hydrocarbons as diesel (T?H-d)of 50 ppm. <br /> The construction of the septic system leachfield is detailed in the facility "as built" schematics as <br /> supplied by the SJCDPW. In short, the leachfield consists of four leach lines, 100 feet in length, <br /> and buried in 2 feet wide trenches by 42 inches in depth. The trenches are approximately spaced <br /> 11 feet apart on center. <br /> 220-YPI-5037201 IM9,/2011 w004 Page A•I" <br /> PY"ght 2001,Kleinre)der.Inc. March 15,2001 <br />