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File No 20-394I-01 E01 KLEINFELDER Apn12, 1997 4 ACTIVITIES CONDUCTED 4.1 Pre-Ficld Activities Encroachment Permits were obtained from the City of Escalon prior to commencement of the ' field activities A copy of the Encroachment Permit is Included in Appendix D None of the field activities associated with this Investigation were performed in Caltrans' Right-of-Way ' Approved Right of Entry Agreements were obtained by the City of Escalon for the borings not advanced on City of Escalon property Approval of the scope of work was secured from Mr Sayed Ali of Caltrans In a letter dated March 10, 1997, and a follow-up telephone conversation with Mr Dale Steele of Caltrans on ' March 11, 1997 Approved Boring Permits were obtained from PHS/EHD prior to initiating the field activities All of the Right of Entry Agreements, Encroachment Permits and PHS/EHD Bonn Permits were g g approved and possessed by Kleinfelder prior to mobilization of the drilling equipment to the ' project site Additionally, prior to the field activities, Kleinfelder prepared a limited health and safety plan for field work proposed ' 4.2 Drillingand Soil Sampling ' A total of three soil borings were drilled at the EZ-Gas Mini Mart One (1) boring was drilled at the ARCO Gas Mint Mart Each of the borings were placed in relatively close proximity to suspected underground storage tanks (see Plates 2 and 3) Three(3)of the bonngs were advanced at the EZ-Gas Mini Mart One of the borings was advanced at the ARCO Gas Mint Mart All four borings were advanced to a depth of approximately 50-feet below surface grade(bsg) ' The soil borings were advanced using a truck-mounted drill ng egtnPPS with 6-Inch diameter hollow stem augers Soil samples were collected begmning at a depth of 15 feet, 5 feet and every 5 feet thereafter for logging purposes and potential chemical analysis The bonngs were dnlled, logged, and sampled according to the protocol described in Attachment B Lithologic classification were based on the Unified Soil Classification System (USCS) The soil samples collected were field screened using an organic vapor detector as described In Attachment B, Section B-2 2 The OVA measures ionizable compounds in air in parts per million by volume (ppmv) The borings were advanced to approximately 50 feet bsg Groundwater was not encountered Groundwater is anticipated to be present at approximately 65 feet bsg 10-3941-111 E01,,2017R005 Page 6 of 11 01997 Kleinfelder Inc