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PUBLIC HEALTH ASSESSMENT ADDENDUM

FRENCH LIMITED
CROSBY, HARRIS COUNTY, TEXAS


ENVIRONMENTAL CONTAMINATION AND OTHER HAZARDS

This section contains lists of the contaminants of concern. However, inclusion on the list does not imply that a contaminantrepresents a threat to public health. Subsequent sections ofthis Health Assessment will evaluate these contaminants todetermine if exposure to them has public health significance. ATSDR selects these contaminants based upon the followingfactors:

  1. Concentrations of the contaminants on and off site.
  2. Field data quality, laboratory data quality, and sample design.
  3. Comparison of site related concentrationswith Health Assessment Comparison (HAC)values for (1) non-carcinogenic endpoints and(2) carcinogenic endpoints. A contaminant isincluded if no HAC values are available.


The data tables and text that follow include the following acronyms and symbols:
* HAC= Health Assessment Comparison Value
* NCREG= Non-carcinogenic Risk Evaluation Guide.
* CREG= Carcinogenic Risk Evaluation Guide.
* PAHs= Polycyclic Aromatic Hydrocarbons
* PCB= Polychlorinated Biphenyl
* RfD= Reference Dose
* MRL= Minimum Risk Level
* EMEG= Environmental Media Evaluation Guide
* ppm= parts per million
* ppb= parts per billion
*µg/L= Micrograms per liter (equal to ppb)
*mg/Kg= Milligrams per Kilogram (equal to ppm)
*µg/m3= Micrograms per cubic meter of air

Health Assessment Comparison Values are contaminantconcentrations for specific media that are used to selectcontaminants for further evaluation. Exceeding a HAC value doesnot imply that a contaminant represents a threat to publichealth. HAC values include Non-carcinogenic Risk EvaluationGuides, Cancer Risk Evaluation Guides, and other relevant healthrelated guidelines. NCREGs are HAC values based on ATSDR'sEMEGs, EPA's RfDs, or other non-carcinogenic health based values.EMEGs are HAC values based on MRLs. CREGs are HAC values basedon the risk of one excess cancer in a million persons exposedover a lifetime.

For the purposes of this discussion the data are presented underon-site contamination and off-site contamination subheadings. Wehave defined on-site contamination to include all data collectedfrom the lagoon as well as all data that we can definitelydetermine has come from the area inside the fence line. Althoughsome of the ground-water samples may have been taken at or nearthe fence line, for ease of presentation we have chosen toinclude all the ground-water data in one off-site contaminationsubsection.

A. ON-SITE CONTAMINATION

Lagoon Sediment and Sludge

LAN collected eleven on-site sediment samples in April of 1983with nineteen additional samples collected in November of thatsame year. Additional on-site sediment sampling was carried outin June of 1986 by LAN and Resource Engineering Inc. (REI) (2). The methods used to collect the samples varied and were dependentupon water depth and the condition of the sediment (1). Sedimentsamples SE25 and SE26 were collected and composited over a depthof four feet (see Table 1). Sediment samples SE01, and SE03 weretaken at four to six inches. Lagoon sludge borings (LB-2, LB-3,LB-4, LB-5 and LB-9) were taken at depths ranging from -4.4 to -41.9 feet. The thickness of the boring was dependent upon thethickness of the sludge being sampled. Samples were alsocollected from the surface of the sludge; however, contaminationin these samples was low compared to the deeper samples,suggesting a downward migration of the contaminants towards theshallow alluvial aquifer.

With the exception of the metals, PCBs, and various pesticides,all maximum levels were found at sample sites SE25 and SE26 whichare approximately in the center of the lagoon. At theselocations benzene, 1,2-dichloroethane, 1,2-dichloropropane, andvinyl chloride were found at levels above their respective CREGvalues. Vinyl chloride also exceeded its NCREG. The heavymetals beryllium and chromium were found to exceed HAC values insediment samples SE01 and SE03. Additionally, sediment sampleSE03 contained total PCBs at a level of 507 mg/Kg, exceeding theCREG value. Other contaminants that exceeded known HAC valueswere pentachlorophenol, acenapthalene, fluoranthene, fluorene,naphthalene, phenanthrene, pyrene, and various pesticides.

Table 1.

Human Health Effects at Various Hydrogen Sulfide Concentrations in Air

FRENCH LIMITED LAGOON SEDIMENT AND SLUDGE ANALYSES

HAC VALUE
CONTAMINANTSDATELOCATIONMAX.
(MG/KG)
NCREG
(MG/KG)
CREG
(MG/KG)
HAC
SOURCE
VOLATILE COMPOUNDS
1,2-DICHLOROETHANENOV 83SE26348NA7.7CSF
1,2-DICHLOROPROPANENOV 83SE261004,50010.3EMEG/CSF
BENZENENOV 83SE25270NA24CSF
CHLOROBENZENENOV 83SE262.71,000NARfD
CHLOROFORMNOV 83SE25230500115EMEG/CSF
METHYLENE CHLORIDENOV 83SE261702,50093EMEG/CSF
TETRACHLOROETHYLENENOV 83SE2512050013.7RfD/CSF
TRICHLOROETHYLENENOV 83SE2548NA63.6CSF
T-1,2-DICHLOROETHYLENENOV 83SE26200 1,000NA RfD
VINYL CHLORIDENOV 83SE266910.368EMEG/CSF

ACIDIC COMPOUNDS
2,4-DIMETHYLPHENOLNOV 83SE25831,000NARfD
PENTACHLOROPHENOLNOV 83SE257401,5005.8EMEG/CSF

BASE/NEUTRAL
ACENAPHTHENENOV 83SE254100 3,000NA RfD
ACENAPHTHYLENENOV 83SE252000 NANA NA
BENZO(A)ANTHRACENENOV 83SE25740 NANA NA
BENZO(A)PYRENENOV 83SE25450 NANA NA
BENZO(B)FLUORANTHENENOV 83SE25700 NANA NA
BENZO(GHI)PERYLENENOV 83SE2574 NANA NA
BIS(2-ETHYLHEXYL)PHTHALATENOV 83SE2645 1000 50 RfD/CSF
CHRYSENENOV 83SE25790 NANA NA
FLUORANTHENENOV 83SE253000 2,000NA RfD
FLUORENENOV 83SE255400 2,000NA RfD
IDENO(1,2,3-CD)PYRENENOV 83SE25110 NANA NA
NAPHTHALENENOV 83SE258700 200NA RfD
N-NITROSODIMETHYLAMINENOV 83SE25700 NA0.014 CSF
PHENANTHRENENOV 83SE258300 NANA NA
PYRENENOV 83SE252500 1,500NA RfD

METALS
BERYLLIUMAPR 83SE0151.6 2500.16 EMEG/CSF
CHROMIUMAPR 83SE03486 250NARfD
LEADAPR 83SE01120 NANA NA

PESTICIDES AND PCBS
ACROLEINJUN 86LB-55025NA EMEG
4,4'-DDTJUN 86LB-923.3252.06RfD/CSF
ALDRINJUN 86LB-30.211.50.041EMEG/CSF
ALPHA ENDOSULFANJUN 86LB-91.17NANANA
ALPHA BHCJUN 86LB-3 0.2NANA NA
BETA BHCJUN 86LB-92.3NANA NA
BETA ENDOSULFANJUN 86LB-970.1NANA NA
DELTA BHCJUN 86LB-20.06NANA NA
ENDOSULFAN SULFATEJUN 86LB-30.14NANA NA
ENDRIN ALDEHYDEJUN 86LB-40.04NANA NA
HEPTACHLORJUN 86LB-30.38250.16RfD/CSF
HEPTACHLOR EPOXIDEJUN 86LB-92.50.650.077RfD/CSF
PCBs, TOTALNOV 83SE03507 0.250.09 EMEG/CSF
PCB-1016NOV 83SE1224 NANA NA
PCB-1260NOV 83SE120.94 NANA NA

NOTE: NA = NOT AVAILABLE

Lagoon Water

Contamination in the upper layers of lagoon water (less than 15feet deep) was low with the concentrations of the volatileorganic compounds appearing to vary with seasonal temperaturechanges. A surface water sample taken in April 1983 containedtrace amounts of volatile organic contaminants, while a sampletaken in November 1983 contained no measurable volatile organiccontamination. LAN suggested that the cooler Novembertemperatures reduced the water solubilities of many of thesecompounds. Table 2 shows the data collected for the watersampled from the lagoon. Except for chromium, all maximumcontaminant concentrations were found at depths greater than 16feet. Numerous volatile and many base/neutral compounds werefound at levels exceeding HAC values.

Table 2.

FRENCH LIMITED LAGOON WATER ANALYSIS


HAC VALUE
ON-SITE CONTAMINANTDEPTH OF SAMPLE
(FEET)
DATELOCATIONMAX
(µg/L)
NCREG
(µg/L)
CREG
(µg/L)
HAC
VALUE

VOLATILE COMPOUNDS
1,2-DICHLOROETHANE17 NOV 1983SW09190 50.38MCL/CSF
1,2-DICHLOROPROPANE17 NOV 1983SW09 179000.51EMEG/CSF
BENZENE17 NOV 1983SW091,500 51.2MCL/CSF
CHLOROFORM17 NOV 1983SW09390 1005.74EMEG/CSF
TETRACHLOROETHYLENE17 NOV 1983SW09 631000.69RfD/CSF
TRICHLOROETHYLENE17 NOV 1983SW09110 NA3.18CSF
T-1,2-DICHLOROETHYLENE17 NOV 1983SW09350 200NARfD
VINYL CHLORIDE17 NOV 1983SW09180 0.20.018EMEG

BASE/NEUTRALS
ACENAPHTHENE17 NOV 1983SW09260 600NARfD
ACENAPHTHYLENE17 NOV 1983SW09240 NANANA
BENZO(A)ANTHRACENE17 NOV 1983SW09280 NANANA
BIS(2-ETHYLHEXYL)PHTHALATE17 NOV 1983SW09390 2002.5RfD/CSF
CHRYSENE17NOV 1983SW09170 0.2NAMCL
FLUORANTHENE17NOV 1983SW09630 400NARfD
FLUORENE17 NOV 1983SW09570 400NARfD
NAPTHALENE17 NOV 1983SW09720 40NARfD
PHENANTHRENE17NOV 1983SW091,300NANANA
PYRENE17NOV 1983SW09740300NARfD

METALS
CHROMIUM1-3APR 1983SW061150NARfD

NOTE: NA STANDS FOR NOT AVAILABLE.

Air

ENSR Consulting and Engineering (Formerly ERT) monitored fenceline air concentrations around the site from April 1987 to

Table 3.

FRENCH LIMITED AMBIENT AIR DATA (All values in µg/M3)#
CONTAMINANTAVG. MAX
FENCE
LINE
PREDICTED VALUESHAC VALUESHAC
SOURCE
400
FT.
RIVERDALEROGGEMAGNOLIA
GARDENS
SLEEPY
TIME
BARRETTSOUTH
CROSBY
NCREGCREG
BENZENE*10.680 3.210 1.260 0.280 0.284 0.290 0.300 0.250 30.120 TACB/CSF
BROMODICHLOROMETHANE*0.686 0.195 0.085 0.016 0.021 0.021 0.026 0.016 NANANA
BROMOFORM*2.475 0.608 0.279 0.052 0.072 0.062 0.083 0.041 50.910 TACB/CSF
CARBON DISULFIDE4.404 1.076 0.267 0.059 0.127 0.078 0.087 0.084 3NATACB
CARBON TETRACHLORIDE*1.508 0.383 0.160 0.079 0.095 0.079 0.095 0.063 130.067 TACB/CSF
CHLOROFORM*15.364 2.897 0.950 0.200 0.250 0.060 0.080 0.180 100.043TACB/CSF
2-CHLORO ETHYL VINYLETHER0.920 0.293 0.132 0.023 0.035 0.035 0.040 0.023 NANANA
DIBROMOCHLOROMETHANE0.680 0.221 0.111 0.017 0.026 0.026 0.034 0.017 NANANA
1,2-DICHLOROETHANE*17.8603.511 1.660 0.026 0.350 0.150 0.240 0.240 40.04 TACB/CSF
1,2-DICHLOROPROPANE*2.490 0.421 0.199 0.051 0.037 0.060 0.065 0.037 350NATACB
METHYLENE CHLORIDE*7.072 1.206 0.636 0.115 0.090 0.094 0.219 0.094 262.130 TACB/CSF
STYRENE*4.718 0.977 0.345 0.064 0.094 0.034 0.051 0.047 851.750 TACB/CSF
TRANS-1,3-DICHLOROPROPENE*0.599 0.226 0.106 0.018 0.022 0.028 0.032 0.018 4.50.027 TACB/CSF
VINYL CHLORIDE*1.607 0.336 0.151 0.028 0.036 0.036 0.054 0.028 130.012 TACB/CSF

* Suspected Human Carcinogen
# Average Maximum Fence line data were measured values. All other data were predicted using a section spread point source model. See text for details.
TACB indicates a NCREG based on the Texas Air Control Board health effects screening level.

August 1988 (7). To obtain maximum emissions from the lagoon,samples were taken during trial bioremediation. This involvedactively bubbling air into the lagoon. Pictures of this processshowed that the bubbling action was very intense and likely toincrease emissions. Air samples were taken in sixteen directions(N, NNE, NE, ENE, E, ESE, SE, SSE, S, SSW, SW, WSW, W, WNW, NW,NNW) around the lagoon when the wind was blowing from the lagoontoward that location. These averages were referred to as"average maximums" (AM) and were modified to more appropriateaverage values by multiplying the AM by the percent of time thatthe wind was blowing in that direction. Backgroundconcentrations were assumed to be zero.

The fence line data presented in Table 3 represent the average maximum values detected from the site at the fence line. CREGvalues were exceeded for each of the chemicals for which a CREGwas available. Additionally, carbon disulfide exceeded thehealth criteria established by the Texas Air Control Board(TACB). Although 1,2-dichloropropane and bromodichloromethaneare suspected human carcinogens, no CREG values were availablefor comparison. HAC values were not available for 2-chloro ethylvinyl ether and dibromochloromethane.

B. OFF-SITE CONTAMINATION

Soil

Off-site soil samples were taken from along Gulf Pump Road, alongthe various drainage pathways used by water runoff from the site,and from around the Riverdale subdivision. Figure 6 shows someof the soil sampling locations. The methods used to collect thesamples varied with some of the samples being collected by handwith a trowel. For many of the chemicals of concern, the highestvalues were found in samples SO01 and SO04 (see Figure 6). Thesesamples were taken from a depth of two to six inches andconsisted mostly of dried sludges with naphthalene, beryllium,and PCBs all exceeding their HAC values. PCBs were found toexceed HAC values at various sample depths, however, the highestvalues were found at the surface (one-half to one inch; samplelocation three). Several base/neutral PAHs were also reported;however, since there are no HAC values for these compounds wewere unable to judge the significance of the reportedconcentrations (Table 4).

In 1986, LAN reported low concentrations of PCBs in the Riverdalesubdivision at sample sites SO10 and SO11. Subsequent sampleswere also taken around Riverdale Lake, by ENSR, after the May 19,1989 flood (8). The post-flood samples contained PCBs at concentrations exceeding CREG values with concentrations as highas 253 mg/Kg. The off-site PCB contamination observed after theflood clearly indicates that, at least in the case of the 1989flood, contaminants were transported off site. It furthersuggests that contaminants may also have been moved off siteduring previous floods.

As a result of the post-flood off-site PCB contamination, EPA andFLTG remediated the contaminated areas. However, the maximumlevel, after phase II of the cleanup, of 7.1 mg/Kg still exceededthe CREG value for these compounds.

Table 4.

FRENCH LIMITED SOILS CHEMICAL ANALYSIS

HAC VALUE
OFF-SITE CONTAMINANTSSAMPLE
LOCATION
SAMPLE
SOURCE
MAX
(mg/Kg)
NCREG
(mg/Kg)
CREG
(mg/Kg)
HAC
SOURCE

VOLATILE
BENZENESO04REI 86ND NA 24CSF

BASE/NEUTRAL
ACENAPHTHENESO04LAN 85683,000NARfD
ACENAPHTHYLENESO04LAN 85280NANANA
BENZO(A)ANTHRACENESO01LAN 8555 NA NANA
BIS(2-ETHYLHEXYL)PHTHALATESO04LAN 8525100050RfD/CSF
CHRYSENESO04LAN 8514 NA NANA
DI-N-BUTYLPHTHALATESO04REI 86NDNANANA
DI-N-OCTYLPHTHALATESO09REI 8618NANANA
FLUORANTHENESO04LAN 85140 2,000 NARfD
FLUORENESO04LAN 85140 2,000 NARfD
NAPHTHALENESO04LAN 85480200NARfD
PHENANTHRENESO04LAN 85360NANANA
PYRENESO04LAN 851101,500NARfD

PCBs
PCBs, TOTAL (post-cleanup)21 ENSR 8921 0.25 0.09EMEG/CSF
PCBs, TOTAL (post-cleanup)9 ENSR 897.1 0.25 0.09EMEG/CSF
PCBs, TOTAL (pre-cleanup)3 ENSR 89253 0.25 0.09EMEG/CSF
PCB-1016SO10LAN 850.003 NA NANA
PCB-1260SO11LAN 850.017 NA NANA
PCBs, TOTAL S004REI 86237 0.25 0.09EMEG/CSF
PCBs, TOTALS001REI 862090.25 0.09EMEG/CSF

METALS
BERYLLIUMSO01LAN 850.5 250 0.163RfD/CSF
CHROMIUMSO01LAN 85220 250 NARfD
LEADSO01LAN 85136NANANA

NOTE: ND STANDS FOR NOT DETECTED AND NA FOR NOT AVAILABLE.

Sediment

PCB isomers were found in sediment from various off-sitelocations. These locations included the area north of U.S.Highway 90 (SE17), the old fishing hole north of the lagoon andsouth of U.S. HW90 (SE14), the slough located northwest of thelagoon and south of U.S. HW90 (SE11 and SE12), and the small pondlocated approximately 200 feet east of Riverdale (SE27). Thepattern of contamination was consistent with the water runoffflow patterns reported for the site (Figure 5). The concentration of PCB isomers at these locations ranged from 0.16mg/Kg to 24.0 mg/Kg and all exceeded the CREG value for PCBs. Volatile and base/neutral compounds did not exceed HAC values. See Table 5 for these results.

Table 5.

FRENCH OFF-SITE SEDIMENT SAMPLES

HAC VALUE
CONTAMINANTSLOCATIONDATEMAX. CONC.
(mg/Kg)
NCREG
(mg/Kg)
CREG
(mg/Kg)
HAC
SOURCE
VOLATILE COMPOUNDS
BenzeneSE14APR 850.27NA24CSF
BASE/NEUTRALS
AcenaphtheneSE12APR 85273,000 NARfD
SE1019830.42

AcenaphthyleneSE12APR 8517 NA NANA
SE1019830.73

Benzo(a)anthraceneSE12APR 854.8 NA NA NA

Bis(2-ethylhexyl)phthalateSE22APR 8523 1,00050RfD/CSF
SE22198323

ChryseneSE12APR 852.5 NA NANA
SE1019830.19

Di-n-butyl phthalateSE28APR 850.82 NA NANA
SE2219830.82

Di-n-octyl phthalateSE22APR 8521NANANA

FluorantheneSE12APR 8521 2,000 NARfD
SE1019830.57

FluoreneSE12APR 8559 2,000 NARfD
SE1019830.82

NaphthaleneSE12APR 85160200NARfD
SE2219830.12

PhenanthreneSE12APR 8591 NA NA NA
SE1019832.1

PyreneSE12APR 8518 1,500 NARfD
SE1019830.87
PCBs
PCBs, totalSE10APR 850.16 0.250.09EPA/CSF
PCB-1016 (surface)SE17APR 850.39
PCB-1260 (surface)SE27APR 850.46
PCB-1016 (surface)SE14APR 850.41
PCB 1016/1260 (surface)SE12APR 8524/0.94
PCB 1016/1260 (surface)SE11APR 859.4/0.35

NOTE: NA STANDS FOR NOT AVAILABLE.

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