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Wendy L. Cohen • • <br /> 1 December 1994 <br /> Comment: The report should state <br /> the taken or planned to address this Problem�u� of inaccessibility <br /> Of PS/A4-2M and show it on at least one Site map ore of the well and the actions <br /> the report should describe the location <br /> 16. Page 4-10, Item 4.3.4, Dissolved Petroleum Hydrocarbons, B-Zone <br /> Report: Evaluation of the h <br /> December 1993quarterlyydrOPunch samples in conjunction with the results of the <br /> impacts <br /> x monitoring event has defined the lateral extent of B-zone <br /> hydrocarbons impacts except to the northwest. <br /> Comment: Results of the <br /> at PS/CP93-4, pS/CP93-5 PS/CP93 7 and Petroleum <br /> need to confirmed with <br /> BTEX were nondetectables PS/CPT. In93-2 defines the northern extent since TpgaCB93-2 <br /> ,ug/I to 1.6 yg/l <br /> PS/=IM) <br /> S/ -lM defines Ute of occasional benzene detection g and <br /> constituents and TPHd/ NW extent in the B-zone since the other BTEX rom 8 <br /> g are ND. <br /> 17. Page 4-11, Item 4.3.4, Dissolved Petroleum Hydrocarbons, C-Zone <br /> Report: C-zone TPHg concentrations in excess of 10,000 ,ug/l are present in the northern <br /> Part of the site at sample locations TO/CB93-1 and PS/CPT93-3. <br /> Comment: These results apply to sample locations TS/CB93-1 and PS/CPT93-3. Eastern and <br /> southern sample locations PS/CB93-4, PS/CPT93-4 (C-2), PS/CPT93-5, and PS/CP 3-7 <br /> show definition isne at needed6in gthese arepas. 170 µg/1, and 2 µg/1, respectively. Thus, further <br /> 18. Page 4-11, Item 4.3.4, Dissolved Petroleum Hydrocarbons, C-Zone <br /> Comment: A MW cluster which goes down to the D-zone and also can be used as an <br /> extraction well should be installed just downgradient of PS/CPT93-3 to monitor and remediate <br /> this "hot spot" location. <br /> 19. Page 4-12, Dissolved Petroleum Hydrocarbons, D-Zone <br /> Report: TO/CB93-1 is impacted by TPHg greater than 10,000 pg/1 <br /> Comment: The correct designation is TS/CB93-1. <br /> 20. Page 4-12, Dissolved Petroleum Hydrocarbons, D-Zone <br /> Report: The eastern limit in the D-zone is not defined. <br /> Comment: I concur with this statement. Therefore, further definition is required and MWs <br /> are needed to confirm hydropunch sample results. <br /> Report: BTEX constituents were detected in PS/CB93-1. <br /> Comment: I concur with this statement. Thus, placing the ND line north of PS/CB93-1 is <br /> incorrect. The ND line should be south and downgradient of PS/CB93-1. <br /> 1 <br />