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Draft Soils FS Memorandum -10- 14 September 1993 <br /> DDRW, Sharpe <br /> b. Page 1-78, Section 1.4.1.4, Lead in Soil: The last paragraph in this section states that the <br /> maximum leachable lead concentration measured by the WET analysis was 565 1Ag/1. This <br /> data should be used in the Designated Level Methodology in order to calculate the Soluble <br /> Designated Levels (SDLs) for lead to determine ground water protective cleanup levels. <br /> C. Page 1-82, Section 1.4.1.4, Chromium in Soil: Same as comment b. <br /> d. Page 1-88, Section 1.4.2.2, Organochlorine Pesticides, S#1 - Bldg. T-47: The Board <br /> requested that a shallow groundwater monitoring well be installed at this site, and I understand <br /> that this has been accomplished. This information should be provided and monitoring results <br /> should be discussed in this section. <br /> e. Page 1-93, Section 1.5, Contamination at SWMUs: This section states that Section 6.3 of the <br /> RI report (ESE, 1990) should be consulted for a complete presentation of results and <br /> conclusions at all SWMUs. This statement is incorrect. The RI report only discusses 31 of <br /> the supposedly 71 sites recommended for sampling in the RI Sampling Plan (ESE, 1989). <br /> Sites in which existing or proposed down gradient groundwater monitoring well sampling was <br /> to be conducted were not presented in the RI Report. It is not clear why approximately 40 <br /> sites recommended for sampling in the RI Sampling Plan were not discussed in the RI report. <br /> There is not sufficient information presented on these sites to be considered as NFA sites. <br /> f. Page 1-103, Section 1.5.1, PS#4 - Bldg. 404: This section states that wastes from Bldg. 403 <br /> (A#43) may have been pumped into the sump located at the north end of Bldg. 404 before <br /> being sent to the IWTP. A full description of the sump is not provided, such as whether it is <br /> earthen, concrete, lined or unlined, dimensions, etc. Although high concentrations of metals <br /> and nineteen volatile organic compounds (VOCs) were documented to be present in the sump <br /> sediment. there is no attempt to assess or describe possible impacts to ground water. This <br /> again is insufficient information to approve this site as a NFA site. <br /> g. Page 1-103, Section 1.5.1, PS#7 - Bldgs. T-661 and 669: See Major Comment 2. <br /> h. Page 1-106, Section 1.5.1, S#28 - South Balloon Area: This section states that an extensive <br /> soil gas survey was conducted in the South Balloon Area and generally indicated that TCE <br /> was not present in detectable concentrations in soil gas. The next sentence states that ESE <br /> collected 114 soil samples from 44 borings around locations of elevated soil gas readings. <br /> These statements are contradictory, the first statement should be deleted. The map of the <br /> South Balloon Area soil gas data (Figure 1.3-2) shows the locations of elevated TCE <br /> concentrations. <br /> i. Page 1-107, Section 1.5.1, S#31 - Adjacent to Building 179 Complex: This section states that <br /> lead was detected in a soil boring sample at 188 µg/g in the 10 to 15 foot interval. It goes on <br /> to state that well cluster 456 is located downgradient of the site and that this well has never <br /> been sampled for lead. There is no explanation as to why this well has not been sampled for <br />