HomeMy WebLinkAboutCUP 194A; Aquaculture Systems International; Conditional Use Permit (CUP) (2)Agua Hcdionda Lagoon
San Dlego County
Sanitary Surrey
1985 - 1989
September 1989
BY
P8trlck E. Wells
Associate Publlc Health Biologist
And
Douglas W. Price, Ph.D.
Senior Publlc Health Blologist
Shellfish Sanitation Program
State Department of Health Sewices
Envlromental Kanagemcnt Branch
Don J. Uomeldorf, Chfef
INTRODUCTION
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In December, 1988, the shellfish sanitation program of the California
Department of Health Services (DHS) conducted a six-day sanitary survey of
the Agua Hedionda Lagoon, San Diego County. Purposes of the survey vera:
(1) to evaluate water quality in the Lagoon, (2) to identify and assess the
impact of pollution sources affecting water and shellfish meat quality in
the Lagoon, and (3) to determine if the commercial shellfish growing area
in the Lagoon (Figure 1) operated by Seafarms West, Inc. is in compliance
with its current 'conditionally-approved' classification according to the
criteria of the National Shellfish Sanitation Program (NSSP). A specific
objective vas to identify the cause of recent elevations in fecal colifonn
levels in commercial shellfish from the Lagoon.
The sanitary survey included the collection and bacteriological analyses of
142 water and 12 meat samples .from designated stations in the Agua Hedionda
Lagoon, as vel1 as from tributaries to the Lagoon and adjacent ocean sites
as shown in Figures 1, 2, and 3, and Table 1. The results of that survey
are presented together with data obtained from Lagoon sapling activities
conducted over the past several years in order to provide an overview of
pollution conditions and to identify any long-term changes in water and
shellfish meat quality.
The survey also included watershed inspection and sampling actfvities.
Hovever, due to an absence of rainfall, tributary inflovs to the Lagoon
were very low or lacking a1together. It vi11 be necessary, therefore, to
conduct further studies during a rainfall period to more fully evaluate the
impact of watershed pollution sources.
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Because of rccent studies in California in vhieh vastwater treatment plant
discharges to the ocean were shown to impact commercial shellfish growing
areas, sampling sites in the present study also were established outside
the'hgoon in ocean waters. The purpose was to investigate the possibility
that diluted effluent from the Oceanside or Encina treatment plants might
be entering the Lagoon in quantities sufficient to cause elevations in
fecal coliform levels in shellfish in the commercial harvesting area.
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FIGURE 1
AGUA HEDIONDA LAGOON - SURF AND LAGOON SAMPLING STATIONS I
SAN DIEGO COUNTY
CALIFORNIA
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%
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0. . ' .- ...*e *.... . .. .. *. .* . .a *. . -. . .
&;;a wmu
. La-
*. .
A ..
, \a; ENCNA
0 . . *' CUTFALL e .. .
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FIGURE 2
AGL'A HEDIONDA LAGOON - NEAR SHORE AND SURF SAMPLING STATIONS
SAN DIEGO COUNTY, CALIFCRNIA
.. .
.. . .. .. *. ,* . .. ... .
@'\
.. .. -. .. ..
.. .. .. ..
. *. . .. .. . '
__ ~
FIGURE 3
ACUA HEDIONDA LAGOON - OPEN OCEAN SAMPLING SfATlONS
the ocean outfall was determined for the City of Oceanside by the Division
of Technical Services of the State Water Resources Control Board. This
determination vas based in part on the characteristics of the ocean outfall
diffuser system supplied by the City of Oceanside.
The bcina Oce an Ou tfall extends southwesterly from the mouth of Canyon de
las Encinas in the City of Carlsbad. The inshore end of the diffuser is
located approximately 7,000 feet offshore at a depth (HLLU) of
approximately 135 feet. The diffuser, which is collinear with the rest of
the outfall, is approximately 800 feet long and extends to a depth (MLLU)
of approximately 165 feet. The design capacity of the Encina Ocean Outfall
is 60.5 XGD. The terminus of the diffuser is located at latitude 330 06'
39" N and longitude 1170 21' 02 " W (Figure 2).
UATER QUALITY INVESTIGATIONS
The DHS shellfish sanitation program began some preliminary vater quality
studies in the AgU8 Hedfonda Lagoon as early as 1982. It was not until
January 1985, however, that the shcllf fshing company initiated commercial
operations 8nd routfne bacterfological testing of grovfng vaters from the
Lagoon began. The sampling data presented in this report include the
results of routine water analyses taken from the commercial growing area
(Figure 1, Station 5) sfnce January 1985, as well as sampler taken
throughout the Lagoon 8nd ocean during the intensive six-day DHS survey in
December 1988.
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fie first set of data, which reflects water quality at Station 5, is
grouped as follows: 1985 in Table 3, 1986 and 1987 in Table 6, and 1988
through July 1989 in Table 5. These data are only from samples taken
during open harvest periods, that is, at times when the Lagoon was not
closed to harvesting because of rainfall. Table 6 shows all vater quality
data from Station 5 from 1985 to July 1989 taken during periods closed to
harvesting because of rainfall.
Because DHS has adopted the NSSP's fecal coliform standard for water
quality, described bclov, only fecal coliform levels are given in Table 3
through Table 6. Total coliform, fecal coliform, and fecal streptococcus
bacteria levels are given in Appendix I, Tables 2h and 2E.
The 1988 NSSP Hanual of Operations states that shellfish groving vaters
shall be classified as "approved" when the median fecal coliform Mort
Probable Number (MPN), or the geometric mean HPN, of the water does not
exceed 14 per 100 01, and not more than 10 percent of the samples exceed an
MPN of 43 for 8 5-tube decimal dilution test. The NSSP Manual 8iso states
that the determination that the approved area chssiflcation standards are
met shall be based upon 8 minimum of 15 rumples collected from e8ch
sampling station in the area being classified.
The NSSP Manu81 stater that 8 "conditionally approved" grovlng area
classification must meet the abova vater quality standards durin8 all
periods which ara designated as open to shellfish h8rvesting. In
California, all conditlon811y approved areas, such 8s tha Agua Hediond8
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Tables 7 and 8.
SHELLFISH HUT QUALITY INVESTIGATIONS
Routine sampling of shellfish from the commercial growing beds in the outer
Lagoon was initiated in 1987, and has continued to the present. The
results of that sampling effort, grouped according to open and closed
harvestin6 periods described earlier, are presented in Tables 9 and 10.
Table 11 compares shellfish meat samples from the outer and inner Lagoon
Lagoon, have mandatory harvest closures based on periods of rainfall when
surface runoff is knovn to adversely impact growing water quality.
The Agua Hedionda Lagoon was classified by DHS as a conditionally approved
shellfish growing area when commercial operations began in 1985. Under
that classification, harvesting closures were required for seven
consecutive days following any 24-hour period which received 0.25 inches or
more rainfall. During the period from 1985 through March 1989, the
relationships between rainfall and water coliform levels substantiated the
need for the above closure requirement (Table 6). Appendix 11. Figures
20-24, depicts the relationship between rainfall and water fecal coliform
levels in the commercial growing area (Station 5).
During the six-day sanitary survey, December 4-9, 1988, water samples were
taken from a number of Lagoon and ocean stations, shown in Figures 1, 2,
and 3. Fecal coliform levels in those samples arc presented in Table 7 and
8, and are shovn graphically in Figures 5-17. Appendix 111. A swnmary of
sampling results for each day of the study is provided in Appendix 111,
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taken during the six-day sanitary survey. Shellfish meat sampling results
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also are presented in Appendix IV, Tables 3A-3C. Table 5, and Figures u
18- 19.
DISCUSSION
Fecal coliform levels in shellfish growing waters (Station 9) of the outer
Agua Hedionda Lagoon taken during open harvest periods meet acceptable
bacteriological standards for 8pproved and conditionally-approved growing
area classifications (Tables 3, 6, and 5). The data reveal no apparent
change in vater quality over the past three years.
Fecal coliform levels in the growing area taken during periods closed to
harvesting due to rainfall do not meet acceptable bacteriological standards
(Table 6). This indicates that the rainfall closures are justified, and
that rainfall-related surface runoff carries pollutants into the Lagoon
which may adversely impact water quality in the growing area.
Fecal coliform levels in shellfish t8ken from the growing area during open
harvest periods frequently exceed the accepted market standrrd of 230 fecal
coliforms per 100 grams of meat (Table 9). Blev8ted fecal coliform levels
in shellfish sampled during open, or non-rainfall, periods suggest
pollution sources not directly related to surface runoff.
There appears to be an increase in the frequency of occurrence of shellfish
meat samples which exceed the 230 fecal coliform market standard (Table 9).
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The reasons for this are not apparent, but this increase suggests an
intensification of non-rainfall related swtces of pollution.
The critical finding of this study is that shellfish not meeting the
coliform market standard were taken frm waters which do meet the NSSP
standard for shellfish growing waters. The reason for this lack of
positive correlation is not known, althaugh several explanations can be
proposed. One possibility is that fecal coliform populations in the outer
Lagoon fluctuate widely, and may be present in high concentrations only for
short time periods. Shellfish may be able to take up large numbers of
coliforms in a short time interval, yet retain them in their bodies for
extended periods. In this event, shellfish will have elevated coliform
levels even when vatcr samples are low--ualess the vater samples happen to
be taken precisely when high numbers of fecal coliforms are present.
A second possibility is that mussels, the only shellfish sampled from the
outer Lagoon during these studies, may be particularly efficient in
removing and concentrating fecal coliforms from the water, even from waters
which meet NSSP stand8rds. Because water quality standards adopted by the
NSSP are based on coliform relatfonshlpr demonstrated for oysters and
clams, it may not be applicable to mussels. This is a matter requiring
further study in the Lagoon, e.g., by taking mussel and oyster samples at
the same time and location to see ff they yield the same or different fecal
coliform counts.
Because ocean waters in the absence of pollution fnputs from land runoff or
sewage treatment plant outfalls are essentially free of coliforn’organisas,
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the low levels of fecal coliform bacteria identified in ocean vater samples
during this study most likely came from sewage effluent discharges. The
levels found vere not unexpected since both the Oceanside and Encina
treatment plants discharge undisinfected effluent.
It follows that the low levels of fecal coliforms found near the entrance
to the Agua Hedionda Lagoon (stations 8 and 8A) may have originated at
either the Oceanside or Encina ocean outfalls and been carried to those
nearshore sampling stations sites by ocean currents. Previous studies at
Morro Bay and the Santa Barbara Channel have shown that fecal coliform
organisms discharged to the ocean via treatment plant outfalls can be
carried in a viable state over many miles by coastal currents.
Low levels of fecal coliform bacteria originating from either the Oceanside
or Encina outfallr, or both, may be carried into the outer Agua Hedionda
Lagoon during flood tides, and these coliforms may be sufficient to elevate
the bacterial levels of shellfish in the coaunercial groving area.
It should be noted, however, that during the study coliform levels in water
samples taken immediately outside the Lagoon entrance and inside the trgoon
at flood tide were generally at acceptable levels for shellfish
maricultural sites. Hovever, only six samples vere taken from each of
these locations -- not enough to determine if ocean waters may on occasion
enter the Lagoon bearing much higher coliform burdens.
The finding that coliforms in mussel samples from the outer Lagoon vere
consistently higher than those from Station 20 in the inner Lagoon (Table
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11) suggests higher levels of pollution in the outer Lagoon. Because the
outer Lagoon is more directly influenced by tidal exchanges of ocean vater,
the ocean is the most probable source of the coliforms in this part of the
Lagoon.
CONCLUSIONS AND RECOMMENDATIONS
The Department's present classiffcation of the Agua Hedionda Lagoon as a
conditionally-approved shellfish growing area is supported by water quality
sampling data obtained over the past several years. Elevated coliform
levels in shellfish meat, however, are a matter of concern. Further
studies are needed to identify and assess the impact of all possible
pollution sources vhich may be affecting the Lagoon. A vet veather survey
is needed to allow monitoring of streams and other watershed inflovs. The
question of whether mussels living in waters which meet NSSP water-quality
standards can concentrate fecal coliform organisms at levels vhfch exceed
the accepted market standards should be explored.
The finding that elevated fecal coliform levels in ocean vaters at Stations
8 and 8A on December 9 (Table 8). coincided with the highest levels in
water samples from within the outer Lagoon (Table 7), as well as with the
highest levels in shellfish meats from Station 5 (Table 11) suggests 8
positive relationship. The difficulty in establishing a correlation,
hovever, lies in the fact that vater quality 8t Station 5 remained well
within acceptable levels throughout the six-day study period ('fable 7). On
this date, the significant difference between shellfish samples taken from
Station 5 and Station 20 in the inner bgoon (Table 11) strongly suggests a
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pollution source outside the Lagoon, that is, the ocean, rather than a
source within the Lagoon itself.
Ttiere is some evidence that upwellings may create hydrographic conditions
vhich bring effluent discharged from ocean outfalls into nearshore waters.
Tidal action may then move those waters into coastal embayments such as the
Agus Hediondr Lagoon. Although this relationship needs further study, it
should be noted that an upwelling event vas noted during the tfme of the
six-day survey. One indication of this is the drop in ocean vater
temperatures at several sampling stations during this period (Table 12).
The increase in ocean water fecal coliform levels at Stations 8, 8A, and in
the outer Lagoon on December 9 (Table 7 and 81, may be related to this
upwelling effect.
Although the available sampling data do not permit a definite conclusion,
the possibility of pollution inflows from the ocean clearly needs further
investigation. Therefore, the DHS shellfish sanftation program recommends
a cooperative wastewater plume transport study be conducted by the
San Diego RegfOn.1 Water Quality Control Board, the EnciM Water Pollution
Control Facility, the City of Oceanside, and the Department of Health
Services.
The proposed study could be patterned after similar recent investigations
of effluent discharges at I4orro Bay and the Santa Barbara Channel. In
addition to r continuation of the general survey and assessment of
pollution sources affecting the Lagoon, the proposed study vould seek to
determine vhecher or not effluent discharges from the Encina or Oceanside
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wastevater treatment plants are carried into the Agua Hcdionda Lagoon in
concentrations which might cause significant elevations in coliform levels
within the commercial shellfish growing area.
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Table 1
Agua Hedionda Lagoon and Adjacent Ocean and
Tributary Sampling Station Numbers and Descriptions
Station lo,
rr1
rr2
*3
#G
rr5
r6
x7
*8
r9 * 10
x 11
x 12 * 13
16 * 15
x 16
17 * 18 * 18~
19 * 19A
20 * 21 * 22
I) 23
# 23A
rr 23B
# 40
# 49
# SO
Seafarms West Wet Storage Tanks
Seafarns Vest Wet Storage Tanks Discharge
Center of Outer Lagoon
Inlet for Vet Storage Supply
Commercial Harvest tease
tog Boom at Santa Fe Railroad Bridge
Inlet to Lagoon from Ocean
Surf at Carlsbad Beach
Surf at SDCbE Pover Plant
Kelp Bed 1 mile from Agua Hedionda Lagoon Inlet
Open Ocean 1-1/2 mile from Agua Hedionda Lagoon Inlet
One Mile Offshore on Encina Outfall Alignment Drainage Way into Center Lagoon, No Flow
YnCA Boat Dock
Midway Main Channel, Center Lagoon
Entrance to Outer Lagoon
Snug Harbor Marina South Shore Ski Beach
Debris Basin above Ski Beach, No Flow
Agua Hedionda Creek Inlet Lagoon Spring Seep above Ski Beach, 1/2 CPM
Pover Boat Buoy Line
Brirtol Cove Marina
North Shore Abandoned Boat Launch
Agua Hedionda Creek Upstream of Lagoon
Tributary Creek, 1 CPU
Agua Hedionda Creek below Horse Pasture and Spring
Surf Off Buena Vista Lagoon
Vicinity of Midpofnt Oceanside Outfall
Artificial Fishing Reef
# 60 Oceanside Harbor Entrance
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Table 2. Average monthly effluent discharges of the Encina and Oceanside
Wastewater Treatment Plants, San Diego County, expressed in million gallons
per day (HGD), during the period 1985 to June 1989.
Encina Wastewater Treatment Plant
1985 1986 1987 1988 1989
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Januarv I 15. 0 I 16.1 I 18.9 I 21.5 I 20.7
Februarv I 15.0 I 17.1 I 19.1 I 21.5 I 20.1 Xarch I 15. 0 I 17.7 I 19.4 I 21.8 I 20.3
ADKi1 I1 4.7E I 16 .O I 19.2 I 20.5 I 20.0
Mav 11 4.5 I 15.0 I 18.9 I 20.1 I
June I1 4.7 I 15-5 I 20.1 1 19.7 1
July 11 4.7 I 15.9 I 20.1 I 19.7 I
AUQUSt 11 4.6 I 16.3 I 20.1 I 19.8 I
Sentember1 1 4.5 1 16.8 I 20.2 I 20.4 I
October I 1s. 7 I 16.0 I 20.3 I 19.4 1
November I 16. 4 1 16.9 I 20.6 I 19.6 I
December I 1 7.7 1 16.9 I 20.8 I 20.7 I
Oceanside Wastewater Treatment Plant
1985 1986 1987 1988 1989 L I I I I I
Januarv I 1 0.0 I 8.9 I 8.9 I 9.8 I 12.0
Februarv I 9.2 1 9.0 I 8.7 I 9.7 I 11.9
Harch I 9.1 I 9.1 I 8.6 I 9.0 I 11.9 i
ril I 9.3 I 8.8 I 8.7 I 10.1 I 11.9 4
Hav I 8.6 I 8.3 I 8.9 I 9.2 I
June I 8.8 I 9.2 I 9.0 I 9.5 I
July I 8.0 I 8.9 I 8.7 I 1l.G I
JUQUSt I 10.2 I 9 .O I 9.1 I 12.0 I
Sebtemberl 8.1 I 9.6 I 8.4 I 11.9 I
October I 8.3E I 8.6 I 8.8 I 11.6 I
November I 8.5E I 8.5 I 9.6 I 11.5 I
December I 8.8E I 8.6 I 9.6 I 11.6 I
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Table 3. Fecal coliform levels in
shellfish growing waters of the
Agua Hedionda Lagoon (Station 5)
taken during open harvest periods,
1985
Fecal Coliform
Date HNP/lOOml
01-02 - 85 <2
01 - 15-85
01-22-85
02 - 19- 85
02 -26 -85 03- 12-85
03- 19-85
06 - 09 - 85
06 - 2 3 - 85
04 - 30-85
05 - 14 - 85
05 - 21 -85
05- 28 - 85
06- 11 - 85
06 - 25 - 85
07 -02 - 85
07 -09 - 85
07 - 16- 85
07-23-85
07- 30 - 85
08 - 13 - 85
08-20- 85
09 -03 - 85
09 - 10- 85
09- 17 -85
09 - 24- 85
10-01 - 8s
10-08 - 85
10- 15 - 85 10 - 22 - 85 10- 29-85
11-05-85
11-19-85
12-23-85
12- 30.85
<2
<2 2
5 2 23
<2
5
7
33
33
2
2
<2
<2
7
13
14
2
8
8
8
2
2
2 7
23
8
8
5
2
2
2
<2
~ ~~~
Xedirn fecal colffora HPN - 2
Percent greater th8n 43 - 0%
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Table 6. Fecal coliform levels in shellfish growing
waters of the Agua Hedionda
Lagoon (Station 5) taken
during open harvest periods,
1986 and 1987.
Fecal Coliform
Date XPN/ 1 0001
04 - 21 - 86
05 - 20-86
06 -03 -86
06 - 17 -86 07-01-86 07 - 15-86
07 * 29 - 86
08 - 12 -86
08-25-86
08 - 26-86
09 -08 - 86
09-09-86
10-07-86
10- 21 -86
11 -04- 86
12-02 -86
12 - 16 - 86
12-30-86
01- 27-87
02 - 10- 87
04 - 01 - 6 7
04-21-67
05 -05 -87
06 -02 -67
06 - 16-87 06-30-87
07 - 16-87
08 -06-87 09 -01 -87
10-01-87 11 - 17-87
c2
c2 8
2 69
c2 <2 c2
<2
49
2
2
<2 c2 11
5
8
11
170
17
5
<2 2
4
<2
<2 13
<2
<2
<2
<2
~~
Hedlrn fecal coliform XPN - 2
Percent 8reater than 43 - 9.7t
Table 5. Fecal calfform levels fn
shellfish growing waters of the Agua Hedionda Lagoon (Station 5) taken
during open harvest periods, 1988 and
1989.
Fecal Coli.
Dace XPN/lOOml.
03- 22-88
05 - 11 - 88
07 - 27-88
08 - 18-88
09- 28-88 10- 26-88
11-07-88 12 - 06 - 88
12 -05-88 12 - 06 -88 12 -07 -88 12 - 08 - 88
12 - 09 -88
01 - 03 -89
01 - 2589
01-26-89
03-16-89
06 - 02 - 89
06- 28-89
05- 10- 89
06-05-89 06 - 19-89
07- 12 -89
<2
2
5 2 <2
2
5 <2
2
<2
6
2
5
2
<2
c2
<2 c2
23
69
8 2 8
m
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Median fecal coliform HPN - 2
Percent greater than 43 - 4.3
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Table 6. Fecal coliform levels fn
shellfish growing waters of the
Agur Hedlonda Lagoon (Station 5) taken
during closed harvest periods, 1985
through Hatch 1989.
Fecal Coli.
brte klPN/lOOml.
01 -08 - 85
01- 29 -83 02 - 12-85 11-26 -85 12-03-85 12-10-85 12 47-65
03- 18-86
03- 19 -86
09- 23 -86 11 -18 -86
01- 13-87
02 - 2G-87
03 * 10 -87
03- 26-87
04 - 07 - 8 7
06-08-87 12 -21.87
06 - 18 -88
12- 19-88
03 - 27-89
03 - 28-89 03- 29-89
<2
13
13
560
560
17
<2
920
80
<2
>2600
70
63
11
7
7
G
5
<2 k9
G 90
2
2
Median Fecal coliform XPN - 13
Percent greater than 43 - 39.1%
Table 7. Fecal co1iform levels in vater samples from the Agua Hedionda Lagoon collected during the 6-day period of the sanitary survey, December 4, through December 9, 1988.
Fecal C oliform HPN/1 00 ml. St at ion Dec. 4 Dec. 5 Dec. 6 Dec . 7 Dec. 8 Dec. 9
Oute r Lagoon 3
4
5
6 7
Middle Lagoon
Inner Lagoon
Mar inas
Tributaries
13
14
15
16
18
19
20
22
17
21
18A
19A
23
2 3A
2 3B
<2
2 c2 <2
c2
2
<2
<2
c2
2
<2
<2
<2
<2
<2
-
-
<2
<2 2 <2
17
5
2
<2
<2 >2GOO
<2
2
<2 -
5
240
3 50 -
4
c2 <2 2
c2
<2
<2
<2
2
17
c2 -
5
8
>2GOO
540
2
2 4
2 8
<2
2
2
<2
2
540
2
<2
69
5
c2
2
G
4
<2
c2
2
2
110
2
<2
<2
7
33
13
5
13
16
<2
5
<2
<2
<2
<2
5
<2
<2
<2
1. See Table 1 and Figure 1 for location and description of sampling stations.
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Table 9. Fecal colffora levels in
shellfish meat samples (mussels) taken
during open harvest periods from the
commercial growing area (Station 5) of
che Agua Hedionda Lagoon,
November 1987, through July 1989.
Fecal Coli.
Date HPN/ 10Q1.
11-17-87
03-22-88
05-11-88
07- 27-88
08- 18-88
09 - 13 - 88
09 - 22 - 88
09 - 22 -88
09-28-88
10 -03 -88
10-26-88
11-07-88
12-Ob-88
12 -05-88
12-06-88
12-07-88
12 -08 - 88
12-09-88
01 -03 - 89
01-25- 89
04-03 - 89
04 * 20 - 8 9
09- 10- 89
06 -09 - 89
06-19 -89
07-12 -89
140
20
130
<20
130
3,300
50
80
220
80
110
60
170 2 30
3 30
2 30
3 30
4,900
80
50 so
23,000
7 90
7,900
2,200
2,300
Percent above the 230/100g.
market standard = 34.6%
Table 10. Fecal coliform levt
shellfish meat samples (mussels)
during closed harvest periods frc commercial growfng area (Station
the Agua Hedionda In December 1987, through Harch
Fecal Date MPU/U
12 - 21 - 87
04 - 18- 88
12- 19 -88
03 - 26-89
03 - 27 -89
03-28-89
03 - 29-89
1
1
3,
Percent above the 2 30/1004 market s trndard - 63
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'fable 11. Fecal coliform levels in shellfish meat samples (mussels) from the commercial growing area of the outcr.Agua Hedionda Lagoon (Station 5) and from a
non-commercial area Of the inner Lagoon (Station 20), December 6-9, 1988.
Fecal Colif om HPN/l 00 E.
Date Station 5 Station 20
40 12 - 04 - 88 170
12-05-88 2 30 170
12-06-88 3 30 70
12-07 -88 2 30 110
12-08-88 3 30 20
12-09-88 6,900 20
Fercent >230/100 E. 5 0 t 0 t
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m: Shallfish medt snplirY3 startied by
11-17-87 5 23,000 140 7,600
11-17-87 1 Ms 24,000 <20 0 40, OOO
U-21-87(R) 5 lbsse.b 7,000 1300 0 1,700 l2-21-87(R) 1 13,000 <20 0 1,600
(R) rainfall closura
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Meat Bacteriological Amlm
'Ibtal ClDli Fed. Qll Fecdl SX/g tie * /lo0 a. /lo0 u. MPN/lOO a. @ 35 c
01-18-88(R) 1 lhsseh 1300 20 - 320
03-22-88
03-22-88
04-18-88 (R)
04-18-88 (R)
05-11-88
05-11-88
07-27-88
07-27-88
08-18-88
09-13-88
09-22-88
09-22-88
09-28-88
09-28-88
10-03-88
10-26-88
10-26-88
11-07-88
11-07-88
l2-19-88 (R)
U-19-88 (R)
08-18-88
09-22-88
1
5
1
5
1
5
1
5
1
5
5
5
5
1
4
5
S
1
5
1
5
1
5
110
11000
70
790
490
1300
13000
33000 130
7900
3300
130
790
80
3 100
23000
490
49000
49000
46000
7900
3300
7900
<20
20 QO
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130
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130
3 300
50
80
<20 70
220
80
<20
110
90
60
20
1700
-
40
110 ..
..
50
80
<20
20
20
460
20 70
-
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230
80
60
46000
-
480
180
E00
360
570 -
0
180
14000 2oooo
350
680
190E
1800
1,200,000
450
7300 22000
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12 OE
4800
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1
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Tutalcbli FecalCOli Fecal- SX/g te /loo u. MR1/100 u. e 35 c
01-03-89 1 Ovstsrs 790 <20 1300 970
01-03-89 S
01-25-89 1
01-25-89 5
03-26-89 (R) 1
03-26-89 (R) 5
03-27-89 (R) 1
03-27-89 (R) 5
03-28-89 (R) 1
03-28-89 (R) 5
03-29-89 (R) 1
03-29-89 (R) 5
04-03-89 5
04-20-89 S
540, Ooo
4900
11OOo
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130
170
170, OOO
230
1300
490
490
130
33,000
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110 3300
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130
80
50
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23,000
80
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460
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50
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1100
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140
20
60
330
2300
43000
3800
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1300
27000
320
3500E
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UOOE
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600
280E
19OE
(R) bmbs rainfall closurr
05-10-89 5 !hdS 1300 790 490 3 10E
06-05-89 5 MlsselS 7900 7900 49 3900
06-19-89 5 Mrssels 2200 2200 790 2700
I -59-
12-04-88
l2-04-88
l2-05-88
l2-05-88
12-06-88
12-06-88
12-07-88 12 -07-88
12-08-88
U-08-08
l2-09-88
12-09-68
I
I
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5
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15
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20 5
20
5
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170
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230
170
3 30
70
230
110
330
20
4900
20
110
230
1300
1300
50
330
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0
0
17,000
3, 800
46,000
44,000
-
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