Laserfiche WebLink
Frontier Transportation B2350101A <br /> January 2, 1996 Page 5 <br /> I <br /> I ` <br /> TABLE 3 <br /> Diesel UST Excavation <br /> Groundwater . Sample Analytical Results <br /> Sample Number Ik"Ane Toluene Ethylbenzene Xylcncs TPH-D <br /> ;AIL Hg/L Pg✓L ,UZX <br /> WS-West < 05 < 05 < OS <05 240 <br /> WS-Center <OS <0.5 <0.5 < 0.5 L200 <br /> WS-East <05 <05 <05 <0.5 700 <br /> TPA-D = total petroleum hydrocarbons - diesel range constituent <br /> µgIL = micrograms per Liter - <br /> < = less than <br /> These results indicate there has been a release of selected PPCs in the vicinity of the <br /> gasoline USTs. However, these results do not qualify nor quantify the extent of PPC <br /> migration in the subsurface soil. In order to demonstrate whether or not this release of <br /> PPCs poses a potential threat to human or environmental health, and if so, what is necessary <br /> for cleanup, the work scope outlined in the following sections is recommended. <br /> 4.0 PROPOSED INVESTIGATIVE PROCEDURES <br /> This characterization will consist of a field investigation, a laboratory testing program, and <br /> preparation of a technical report. This workplan and the activities summarized below are . <br /> intended to be consistent with SJCPHS, Environmental Health Department requirements. <br /> Standard operating procedures (SOPS), relevant to the field and laboratory activities, are <br /> described in Appendix A. Specific procedures and any exceptions to the SOPS which will <br /> be used in this characterization are summarized in the following sections. <br /> 4.1 Field Investigation: The field investigation will consist of drilling soil borings and <br /> collecting soil samples for chemical analyses. <br /> 4.1.1 Soil Boring Locations and Soil Sampling Criteria : Twining proposes to collect soil <br /> samples from five hand angered soil borings to investigate soil beneath the former dispenser <br /> island and the former product piping. The soil samples will be collected using a hand auger <br /> which will be advanced to approximately 3 feet BSG consistent with our SOPS. This <br /> sampling will be carried out concurrent with the removal of the product delivery lines by <br /> Frontier Transportation's excavation contractor. Proposed hand auger sample locations are <br /> shown on Drawing 4. The final locations of the samples may be adjusted in the field due <br /> to underground utilities and other site improvements. <br /> Additionally, Twining proposes to drill three vertical soil borings (13- 1 through B-3) and one <br /> angle boring (B-4) to investigate soil conditions around the former gasoline USTs location. <br />