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VOW <br /> ' k'i K L E I N F E L D E R <br /> ' 4. ACTIVITIES CONDUCTED <br /> ' 4.1 PRE-FIELD ACTIVITIES <br /> As required by San Joaquin County Public Health Services Department Environmental Health <br /> ' Division (PHS/EHD), Kleinfelder submitted a boring/well permit application and workplan to <br /> San Joaquin County PHS/EHD in May 1997. Kleinfelder also prepared a health and safety plan <br /> ' for use in the field. However, PHS/EHD did not grant permit or workplan approval until a copy of <br /> the "right-of-entry" agreement for the Phase II Environmental Site Assessment was provided to <br /> their office. A copy of the right-of-entry agreement was supplied by the San Joaquin Regional Rail <br /> ' Commission (SJRRC) to Kleinfelder and subsequently PHS/EHD in February 1998. Based on the <br /> submittal,permit and workplan approval was given. <br /> 4.2 FIELD ACTIVITIES <br /> ' Kleinfelder obtained approval of the workplan, including permitting for drilling, soil sampling, and <br /> groundwater sampling from PHS/EHD. As a part of the field assessment, a total of nine <br /> exploratory soil borings were drilled, six in the areas of environmental concerns (B1/HP-1 <br /> through B6/HP-6) and three for geotechnical purposes (B7 through B9). See Plate 2 for the <br /> approximate boring locations. A petroleum-like odor was noted in Boring B7, therefore an <br /> ' additional soil sample was submitted for chemical analyses. For purposes of this report, only the <br /> borings associated with environmental concerns (B1/HP-1 through B6/H P-6 and B7) will be <br /> addressed, a second report will address the geotechnical findings. <br /> The borings were advanced using a truck-mounted drill rig equipped with 6-inch diameter <br /> hollow stem augers. Soil samples were collected at 5 foot intervals beginning at a depth of 5 feet <br /> ' for logging purposes and potential chemical analysis. <br /> The borings were advanced to a maximum depth of 21 feet. The borings were advanced using 6- <br /> inch outside diameter hollow stem auger. Groundwater was found at depths of between 9 and 12 <br /> feet. Kleinfelder collected a total of 15 soil samples for logging purposes, and potential chemical <br /> ' analysis from the borings. Groundwater samples were collected from borings B1/HP-1 through <br /> B6/HP-6 using a Hydropunch IITM sampling device as described in Attachment B, Section B-2.4. <br /> Chemical analysis was subsequently conducted on thirteen of the soil samples and all six <br /> ' Hydropunch IITM groundwater samples. <br /> The soil borings were closed in accordance with the protocol described in Attachment B. Soil <br /> ' cuttings generated while drilling were placed on and covered by visqueen, however soil noted <br /> with a petroleum-like odor and/or grayish color were contained in 55-gallon drums. The water <br /> generated during steam cleaning of auger and/or equipment were left on site in labeled 55-gallon <br /> drums. <br /> 20-4054-OI.E01/2018R299 Page 7 of 15 <br /> © 1998,Kleinfelder,Inc. May 8, 1998 <br />