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KLE/NFELOER <br /> V 8 <br /> i/9hf✓eap/e,fl/g�l Solu Janf <br /> WORK PLAN <br /> Phase II Assessment <br /> Benjamin Holt Drive Improvement Project <br /> From Gettysburg Place to Pacific Avenue <br /> Stockton, California <br /> File No. 133385.2 <br /> April 2, 2013 <br /> INTRODUCTION <br /> Kleinfelder is pleased to present this work plan to San Joaquin County Environmental Health <br /> Department. This work plan was developed after correspondence with Mr. David Mendoza and <br /> Ms. Thienan Nguyentan of San Joaquin County Public Work, Design Engineering Department <br /> (SJCPW), using Kleinfelder's current understanding of the site conditions and is a preliminary <br /> understanding of SJCPW's desires and requirements. <br /> SCOPE OF WORK <br /> SJCPW has requested Kleinfelder to provide environmental services preparatory to the <br /> proposed widening of Benjamin Holt Drive between Gettysburg Place and Pacific Avenue. The <br /> following scope of work includes proposed field work, laboratory analyses, and reporting based <br /> upon our understanding of current site conditions and information provided to Kleinfelder from <br /> SJCPW. <br /> Advancement of Pushprobes and Laboratory Analyses <br /> The purpose of the pushprobe assessment will be to evaluate petroleum constituents and <br /> volatile organic compounds in shallow soil along a proposed storm drain alignment between <br /> Gettysburg Place and Pacific Avenue. SJCPW has requested advancement of approximately <br /> nine probes down the centerline of Benjamin Holt Drive in the project area, with 50 foot spacing <br /> between approximate Station 15+00 to 17+00 and with 150 foot spacing through the remainder <br /> of the alignment (see Plate 1) to approximate Station 24+00 (near Pacific Avenue). The total <br /> probing depth is proposed at 6 feet below ground surface (bgs) which is below the estimated <br /> depth of the proposed storm drain of 41/2 feet. The actual pushprobe locations will be dependent <br /> on access, surface conditions, and potential interference with subsurface and above-ground <br /> utilities. <br /> Kleinfelder expects groundwater to be approximately 25 to 30 feet bgs; therefore, we do not <br /> anticipate encountering groundwater at the proposed total assessment depth of 6 feet. <br /> Pushprobes will be advanced using a pneumatically driven steel probe. Soil samples will be <br /> obtained by inserting a sample barrel lined with acetate liners into the ground. The sample <br /> barrel will be lowered to the desired sampling interval and driven into the soil. The sample liners <br /> 133385.2/ST013L0278 Page e 1 of 4 <br /> Copyright 2013 Kleinfelder April 2, 2013 <br />