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KL EINFEL €3ER <br /> been discussed in the background section of this proposal relevant to groundwater <br /> monitoring that has been conducted at the adjacent Lincoln Center site. The purpose <br /> of this proposal is to address first encountered shallow groundwater beneath the <br /> subject site for potential contaminants based on background information available at <br /> the time of this writing (Lincoln Center groundwater report). Shallow groundwater <br /> contamination is being addressed in the proposed scope of work based on the <br /> assumption that potential risks to future occupants at the site are greater in the shallow <br /> groundwater zone and since cost to evaluate deeper zones are relatively expensive in <br /> comparison with first encountered groundwater. If the client desires to evaluate deeper <br /> groundwater zones for potential contaminants, a separate proposal can be drafted for <br /> this purpose. <br /> It is Kleinfelder's opinion that one field day utilizing a pushprobe rig is needed to <br /> evaluate subsurface groundwater conditions beneath the site. Kleinfelder estimates <br /> approximately three push probes can be advanced in this time assuming no significant <br /> problems with access to the subject site buildings, potential for subsurface utilities, bad <br /> weather conditions or that groundwater is located at notably deeper depths than 35 feet <br /> bgs. The pushprobes will be advanced approximately 35 feet bgs and random intervals <br /> along the northern and western borders of the subject site. This assumption is based <br /> upon the most recent groundwater data summarized above indicating groundwater flow <br /> direction is east by northeast. <br /> Prior to the advancement of the push probes, the near surface soil will be hand- <br /> augured to assess potential underground utilities. The push probes will be advanced <br /> using a pneumatically driven steel probe/core barrel containing acetate sample liners. <br /> Soil cores will be obtained by driving the sample barrel to the desired sampling depth. <br /> During the advancement of the probes, soil samples will be continuously collected for <br /> lithologic classification and qualitative field screening, with an organic vapor analyzer <br /> (OVA). The OVA measures ionizable compounds in air in parts per million by volume <br /> (ppmv). Lithologic classification will be based on the Unified Soil Classification System <br /> (USCS). If field indications of soil contamination are observed, the client will be <br /> contacted for approval of potential soil analyses. <br /> At each of the push probe locations a single grab groundwater sample will be collected. <br /> Groundwater samples will be collected using a disposable or stainless steel bailer or by <br /> positive displacement through polypropylene tubing attached to a stainless steel ball <br /> valve. A disposable screened PVC casing will be placed within each of the probe <br /> borings to filter out sediment. The PVC casing will include a 5 to 10 foot 0.010-inch slot <br /> screened interval, placed within the water bearing zone, prior to groundwater collection. <br /> The groundwater will be decanted into laboratory supplied bottles directly from the <br /> tubing or disposable/stainless steel bailer/s. <br /> Immediately after collection, the groundwater samples will be labeled, logged on a <br /> chain-of-custody form, and immediately stored in an iced cooler. The samples will be <br /> transported under chain-of-custody control to Kleinfelder's office and then transported <br /> 02001 PROP.ENV/ST07P271/DGD iv/ra Page 3 of 8 <br /> ©2007 Kleinfelder October 31,2007 <br />