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Reich Farm Health Assessment
(Dover Township) Toms River, New Jersey
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Groundwater Investigations: USEPA Remedial Investigations, 1986 to 1993
The 1989 Public Health Assessment by ATSDR reviewed the soil and groundwater data collected for the 1986 and 1988 RI reports (ATSDR, 1989a). Table 2 and Figures 5, 6 and 7 present summaries from the 1986 and 1988 RIs of
hazardous substance list (HSL) and target compound list (TCL) contaminants detected in on-site soils and groundwater. The USEPA identified public health risks associated with the migration of ethylbenzene, chlorobenzene,
trichloroethylene (TCE), tetrachloroethylene (perchloroethylene,or PCE), and bis(2-ethylhexyl)phthalate (BEBP) into groundwater (Ebasco, 1988b).
Table 6 summarizes data collected by the USEPA in 1986 and 1987 regarding off-site groundwater quality in eight private wells in the Pleasant Plains area and TRWC community supply wells at the Parkway and Indian Head well
fields (NUS, 1986; Ebasco, 1988b). One private well (RW-7), located just up-gradient from the RF site, exhibited contamination with VOCS. PCE, carbon tetrachloride and bromoform exceeded health-based comparison values,
while 1,1,1-trichlorethane and chloroform did not (Table 6). (See the appendix for a description of health-based comparison values). An initial report of contamination in another private well was not confirmed in a
duplicate or re-sample (Ebasco, 1988c; ATSDR, 1989a).
Three of the Parkway well field wells (#26, #27 and #28) also showed evidence of VOC contamination with TCE, PCE and benzene (Table 6). A sample from Parkway well #23 contained N-nitrosodiphenylamine, a contaminant
also found in one on-site monitoring well, at a level near the health-based comparison value. On the basis of the data from on-site and off-site wells, ATSDR identified TCE, PCE, N-nitrosodiphenylamine, and BEHP as contaminants
of concern in off-site groundwater in 1989 (ATSDR, 1989a).
Newspaper accounts from November 1987 reported that in July 1987, TRWC Parkway well #26 contained TCE at 13 µg/], and TRWC Indian Head well #20 showed TCE at 1 µg/1,1,1,1-trichloroethane at 0,6 µg/l, chlorobenzene at 0.5 µg/l
and benzene at 0.2 µg/l (APP, 1987a; OCO, 1987a).
As part of the predesign activities conducted by Malcolm Pirnie on behalf of the UCC, TRWC community water supply wells and two TRWC monitoring wells (at Dugan Lane and at Swain Ave.) were sampled in 1990 and 1991 (Table 7).
Samples of untreated water from TRWC wells #26 and #28, and a sample from well #29, exhibited contamination by volatile organic contaminants at or exceeding health-based comparison values; well #22 did not show signs of contamination.
TCE was found at 120 µg/l at the Swain Ave. well, and at 33 µg/l in well #26. Lower levels of 1,2-dicbloroethane, 1,1,1-trichloroethane, and PCE were also found in the Swain Ave. well and in well #26. Wells #28 and #29 contained
TCE at 1 and 3 µg/l, respectively. At the time of this sampling, the output of wells #26 and #28 was being treated by packed tower aeration (air stripping), while the output of well #29 was not being treated.
These wells were intercepting the RF groundwater plume.
The "Pathways Analysis" and "Public Health Implications" sections of this Public Health Assessment evaluate the public health significance of the data presented in the Phase I and 11 Predesign Report.
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