Laserfiche WebLink
Problem Assessment Report <br />for Soil and Groundwater Contamination <br />Corrigan Property (Project No W0541 00) <br />included in the boring/well logs (Appendix III) Cored soil samples were collected using 2 -inch <br />diameter split -spoon samples containing three brass tubes The cored samples and drill cuttings <br />were characterized for soil type, moisture content and evidence of petroleum contamination <br />Moreover, a photoionization detector (PID) meter was used as a screening device for the <br />detection of petroleum hydrocarbon vapors in drill cuttings and cored samples. All soil samples <br />collected were submitted for laboratory analysis. Soil sampling results are summarized in Table <br />4. Laboratory data sheets and chain -of -custody documentation are included in Appendix IV. <br />Upon attainment of total depth, approximately two to three feet of bentonite was placed in the <br />bottom of each open borehole and hydrated Neat cement was subsequently used to fill the <br />remaining open hole to the surface <br />5.0 LITHOLOGY <br />Soil encountered beneath the project site consists primarily of elastic silt (MH) and lean clay <br />(CL) to approximately 27 feet below grade, the maximum depth explored. An apparent sand <br />(SP) lens was noted in soil boring MW2 from approximately 17 to 21 feet below grade. <br />Stratigraphic cross section orientations are shown on Figure 10 Site stratigraphy is shown on <br />Figures I1 and 12. <br />Strong to moderate product odors were noted in soil borings MW2, SBI, SB2, and SB4 Slight <br />product odor was observed in soil borings SB6 and S137 <br />Groundwater was encountered at approximately 6 feet below grade during drilling activities on <br />January 28, 1993 <br />PAR -0393 WL 5 <br />