hydrogeological data collected from a test well in ... level and specific conductance data obtained...
TRANSCRIPT
Hydrogeological Data Collected from a Test Well in Barceloneta, Puerto Rico
By Carlos Conde-Costas
U.S. GEOLOGICAL SURVEY
Open-File Report 98-267
Prepared in cooperation with the
PUERTO RICO INDUSTRIAL DEVELOPMENT COMPANY
and PUERTO RICO DEPARTMENT OF NATURAL AND ENVIRONMENTAL RESOURCES
San Juan, Puerto Rico 1998
U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary
U.S. GEOLOGICAL SURVEY Thomas J. Casadevall, Acting Director
The use of firm, trade, and brand names in this report is for identification purposes only and does not constitue endorsement by the U.S. Government.
For additional information write to:
District ChiefU.S. Geological SurveyGSA Center, Suite 400-15651 Federal DriveGuaynabo, Puerto Rico 00965-5703
Copies of this report can be purchased from:
U.S. Geological Survey Branch of Information Services Box 25286 Denver, CO 80225-0286
CONTENTS
Abstract................................................................................................................................................................ 1
Introduction.......................................................................................................................................................... 1
Results.................................................................................................................................................................. 3
References............................................................................................................................................................ 7
ILLUSTRATIONS
1. Map showing location of artesian wells on the north coast of Puerto Rico............................................... 2
2. Water level and specific conductance data obtained during the drilling of thetest well in Barceloneta, Puerto Rico...................................................................................................... 4
3. Chemical classification of ground water at test well in Barceloneta, Puerto Rico.................................... 6
TABLES
1. General geologic units in the test well completed at Barceloneta, Puerto Rico........................................ 3
2. Water-quality field determinations from test well in Barceloneta, Puerto Rico ........................................ 5
3. Concentration of selected water-quality parameters determined from test wellin Barceloneta, Puerto Rico.................................................................................................................... 8
Contents III
CONVERSION FACTORS AND ABBREVIATED UNITS
Multiply
foot
inch
mile
million gallons
million gallons per day
square mile
cubic feet per second
By
0.348
25.4
1.609
0.04381
0.04381
259.0
448
To obtain
meter
millimeter
kilometer
cubic meter
cubic meter per day
hectare
gallons per minute
Temperature: In this report temperatures are given in degrees Celsius (°C).Temperatures may be converted to degrees Fahrenheit (°F) as follows:
°F = (9/5 x °C) + 32
Abbreviated water-quality units used in this report:
micrograms per liter (flg/L) milligrams per liter (mg/L) microsiemens per centimeter at 25 °C (jj,S/cm)
Contents IV
Hydrogeological Data Collected from a Test Well in Barceloneta, Puerto Rico
By Carlos Conde-Costas
Abstract
A test well was drilled and installed into the north coast limestone sequence in Barceloneta, Puerto Rico, during September and November 1995. Water-quality, geologic, and hydraulic data were collected during drilling of this test well. The test well was drilled to a depth of 1,800 feet by using a dual-wall reverse circulation rotary drill rig. The water-table surface was located at a depth of about 235 feet below land surface. The upper aquifer was identified in the Aymamon Limestone and Aguada Limestone which extend 700 feet below land surface. The lower aquifer was found in the Montebello Limestone Member of the Cibao Formation and Lares Limestone which were penetrated beginning at a depth of 868 feet to the bottom of the well at 1,800 feet below land surface. The maximum potentiometric head in the lower aquifer was 4 feet below land surface. The confining unit between the upper and lower aquifers was an impermeable calcareous claystone, found from 700 to 868 feet below land surface.
Water samples for common ions, nutrients, trace metals, synthetic organic compounds (halogenated and aromatic hydrocarbons), and physical properties (temperature, pH, specific conductance, and alkalinity) were obtained from the upper aquifer at 440 feet below land surface and from the lower aquifer at a depth of 1,780 feet below land surface. The geochemical analyses indicate that ground water from both aquifers is predominantly a calcium-bicarbonate type.
Concentrations of common constituents, trace metals, and nutrients in the upper and lower aquifers were within the normal range for the
geologic formations penetrated. Nevertheless, the sample obtained at a depth of 1,780 feet contained anomalous concentrations of lead, 20 micrograms per liter (normal < 10 micrograms per liter); molybdenum, 30 micrograms per liter (normal < 10 micrograms per liter); total ammonia nitrogen as N, 1.5 milligrams per liter (normal < 0.2 milligrams per liter as N); and total nitrite and nitrate as N, 1.3 milligrams per liter (normal < 0.1 milligrams per liter as N). The water sample obtained from the completed well contained an anomalous concentration of dissolved mercury, 0.2 micrograms per liter (normal < 0.1 micrograms per liter), and nitrogen species. Concentrations of synthetic organic compounds (halogenated and aromatic hydrocarbons) in the upper and lower aquifers were below the detection limits of the analytical procedures used, 0.1 micrograms per liter.
INTRODUCTION
During September and November 1995 a test well was drilled at Nycomed Puerto Rico Inc., Barceloneta, Puerto Rico (fig. 1) as part of a study of inter-aquifer water movement by the Puerto Rico Industrial Development Company, the Puerto Rico Department of Natural and Environmental Resources and the U.S. Geological Survey. The inter-aquifer study was initiated to investigate the greater than anticipated loss of hydrostatic pressure from the north coast lower (artesian) aquifer system. This report contains hydrogeologic data collected during the drilling operations of the test well drilled into the North Coast limestone sequence in Barceloneta, Puerto Rico.
Introduction 1
66
°45
'66
°30
18°3
0'
~
18°2
2'30
"' ~
v)*
^^<
^\
.\.;x
.4'I<
; x
"-"?
*''
\/H
I?*/
**
»
^ £'
s>_>^
.%
'J^-*
'**^
Ji
Tv'
til'J-
'''"1*
l's*'*
x»;'!!
^lr*
"*",'
'-*
- *
r"
**" -
~4^--
^--'*
"m'*'*
****
^)fcl1
Tt
,.....
.,,
-%^'T
* v
^
^0
^-
-:-.-.
..^-.5
>^i%
t^
v-sr
-c
^^/
]
\1
l^<
\\
^.
,_,t
-,._
/\
i. >
/
\ \ '
' /
rr* r
°j - ^
: ~-^<
& -r>
-;: ***
* &Ba
se fr
om U
S G
eolo
gica
l Sur
vey
Puer
to R
ico
e Is
las
Lim
itrof
es,
scal
e: 1
:120
,000
,195
1 ed
ition
.
2.5
5 K
ILO
ME
TE
RS
2.5
5 M
ILE
S
EX
PLA
NA
TIO
N
®
Loca
tion
of a
rtesi
an w
ells
+
Loca
tion
of te
st h
ole
Stu
dy
area
Loca
tion
of s
tudy
are
a in
Pu
erto
R
ico
Figu
re 1
. Lo
catio
n of
arte
sian
wel
ls o
n th
e no
rth c
oast
of
Pue
rto R
ico.
Test-well drilling was completed by using a dual-wall reverse circulation rotary drill rig. Use of this type of drill rig is often referred to as dual-wall or dual-tube drilling. This method of drilling uses flush- jointed, double-walled pipe in which the drilling fluid, usually air, is injected down the annulus between the two pipes, with cuttings and ground water returned through the inner pipe. The drill pipe can be connected directly to a variety of drill bits which may include a down-hole air hammer, tricone bit, or open-center coring bit. By using the open-center coring bit on the test well, it was possible to collect continuous cores while drilling through the upper (unconfined) and lower aquifers at the site. The cores were used to improve geologic descriptions of the north coast aquifers at the drill site in terms of aquifer thickness and the location and thickness of the confining beds between the aquifers. The dual-tube method of drilling also allowed for the collection of hydraulic head and water-quality samples at depth-specific intervals.
During the course of the drilling, the cores and cuttings that were collected from the test well were stored in plastic core boxes which holds 20 feet of core or cuttings per box. Specific conductance measurements were made every 10 feet. Depth to the water surface was also determined during drilling (fig. 2). Following completion of the test well, two tests to estimate aquifer yield were conducted (at 500 and 1,800 feet below land surface datum).
Water quality samples were also collected at three distinct depths within the test well (one upper aquifer sample at 440 feet and two lower aquifer samples at 1,158 and 1,780 feet below land surface datum). Samples collected were analyzed for common ions, nutrients, trace metals, and synthetic organic compounds (halogenated and aromatic hydrocarbons). Physical characteristics (temperature, pH, specific conductance, and alkalinity) were also measured on site. Detailed information on the procedures and methods used for on site measurements and laboratory analyses, as well as for collecting, treating, and shipping samples are given in the following U.S. Geological Survey publications "Techniques of Water Resources Investigations of the U.S. Geological Survey" Book 1, Chapter D2 and Book 5, Chapter Al.
RESULTS
The test well was drilled to a depth of 1,800 feet during September and November 1995. The test well penetrated the north coast limestone sequence (table 1). The upper aquifer was found in the Aymamon Limestone and Aguada Limestone which extend 700 feet below land surface. The water-table surface was located at a depth of about 235 feet below land surface (fig. 2). The lower aquifer is found in the Montebello Limestone Member of the Cibao Formation and Lares Limestone which were penetrated beginning at a depth of 868 feet to the end of the hole at 1,800 feet below land surface.
Table 1. General geologic units in the test well completed at Barceloneta, Puerto Rico (land surface altitude of the test well is approximately 250 feet above mean sea level)
Geologic Unit Depth below land surface in feet
Aymamon Limestone and Aguada Limestone
Upper Member of the Cibao Formation
Montebello Limestone Member of the Cibao Formation
Lares Limestone
0 - 700
700 - 868
868 - 1,660
1,660 - 1,800
Results
u
200
,_ 400LiJ LU LLZ
LAND SURFACE, oo a>0 0o o
£3 1,000LJJ CO
g 1,200
1,400
1,600
1,800 -2C
i
-
-
-
-
i
-
Confining Unit
-
Artesian Aquifer -
i i
)0 -100 0 +100 +200
-
-
-
t4
4
i
Confining Unit
-
-
-
-
-
-
-
-
+300 10° 10 1 102 103 104 1C
WATER LEVEL IN, FEET - Above land surface + Below land surface
SPECIFIC CONDUCTANCE, IN MICROSIEMENS PER CENTIMETER
Figure 2. Water level and specific conductance data obtained during the drilling of the test well in Barceloneta, Puerto Rico.
Results
The maximum potentiometric head in the lower aquifer was 4 feet below land surface. The confining unit between the upper and lower aquifers is an impermeable calcareous claystone, found from 700 to 868 feet below land surface.
To obtain an estimate of relative yield in the well, two flow tests were conducted. The first test was conducted on September 14, 1995, in the upper aquifer. Discharge was measured from the 3-inch diameter inner pipe of the double walled dual-tube drill pipe. The test was conducted by raising the bottom of the drill pipe to a depth of 440 feet below land surface, leaving an open well bore interval of 60 feet, and then air-pumping the well to force discharge from the inner pipe. This measured flow was 116 gallons per minute. The second flow test was made in the lower aquifer and was conducted on September 26, 1995, by placing the bottom of the drill pipe at a depth of 1,760 feet below land surface, leaving an open well bore interval of 40 feet. Air-pumping at this interval yielded a flow of 264 gallons per minute.
Complete water samples for common ions, nutrients, trace metals, and synthetic organic compounds (halogenated and aromatic hydrocarbons), and physical properties (temperature, pH, specific conductance, and alkalinity) were obtained from the upper aquifer at 440 feet below land surface and from the lower aquifer at a depth of 1,780 feet below land
surface during drilling on September 14 and 26,1995. Another sample was obtained on November 29, 1995, when the well was completed (cased to 1,158 feet below land surface) and left open to the aquifer from 1,158 to 1,800 feet. Water samples were analyzed at the U.S. Geological Survey National Water Quality Laboratory in Arvada, Colorado.
Starting a depth of 360 feet below land surface, water samples for specific conductance were collected every 10 feet during drilling. The specific conductance in the upper aquifer averaged 410 microsiemens per centimeter (jiS/cm) at 25 degrees Celsius and ranged from 320 near the water-table surface to 450 JiS/cm (fig. 2). The specific conductance in the lower aquifer within the Montebello Limestone Member of the Cibao Formation averaged 430 JiS/cm and ranged from 390 to 500 fiS/cm, while in the Lares Limestone specific conductance averaged 450 JiS/cm and ranged from 410 to 470 JiS/cm. The geochemical analyses (tables 2 and 3; table 3 at end of report) of ground- water samples collected from the upper and lower aquifers indicate that ground water is predominantly a calcium-bicarbonate type in which the chemical properties of the water are dominated by alkaline earths (calcium and magnesium) and weak acids (bicarbonate) (Hem, 1989). The geochemical analyses of the first two samples are plotted in the Piper diagram in figure 3.
Table 2. Water-quality field determinations from test well in Barceloneta, Puerto Rico[°C, degrees Celsius; JiS/cm, microsiemens per centimeter at 25 degrees Celsius; mg/L, milligrams per liter]
Date (m/d/y)
9/14/95
9/26/95
11/29/95
Depth (feet)
440
1,780
1,158
Temperature (°C)
24.5
23.5
24.5
pH (Units)
7.4
7.6
7.3
Specific Conductance
(uS/cm)
450
475
450
Alkalinity (mg/L as CaCO3)
210
243
232
Results
Ca
Cations
Cl
Anions
Percentage Reacting Values
EXPLANATION
0 1 Upper aquifer
2 Lower aquifer
Figure 3. Chemical classification of ground water at test well in Barceloneta, Puerto Rico.
Results 6
Concentrations of common constituents, trace metals, and nutrients in the upper and lower aquifers were within the normal range for the geologic formations penetrated as reported by Roman-Mas and Ramos-Gines (1988) in their compilation of water- quality data for the north coast limestone aquifers. Nevertheless, the sample obtained at a depth of 1,780 feet contained anomalous concentrations of the following constituents: lead, 20 ^ig/L (normal < 10 ug/L); molybdenum, 30 ug/L (normal < 10 ug/L); total ammonia nitrogen as N, 1.5 mg/L (normal < 0.2 mg/L as N); and total nitrite and nitrate as N, 1.3 mg/L (normal < 0.1 mg/L as N). The water sample obtained from the completed well contained an anomalous concentration of dissolved mercury, 0.2 ug/L (normal < 0.1 ug/L), and for nitrogen species. Concentrations of synthetic organic compounds (halogenated and aromatic hydrocarbons) in the upper and lower aquifers were below the detection limits of the analytical procedures used, 0.1 ug/L.
REFERENCES
Hem, J.D., 1989, Study and Interpretation of the Chemical Characteristics of Natural Water: U. S. Geological Survey Water-Supply Paper 2254,263 P-
Roman-Mas, Angel, and Ramos-Gines, Orlando, 1988, Compilation of water-quality data for the north coast limestone aquifers, Puerto Rico, 1951 to 1987: U.S. Geological Survey Open-File Data Report 87-533, 133 p.
Skougstad, M.W, Fishman, M.J., Friedman, L.C., Erdmann, D.E., and Duncan, S.S., 1979, Methods for determination of inorganic substances in water and fluvial sediments: U.S. Geological Survey Techniques of Water-Resources Investigations, Book 5, Chapter A1, 626 p.
Wershaw, R.L., Fishman, M.J., and Grabbe, R.R., 1987, Methods for the determination of organic substances in water and fluvial sediments: U.S. Geological Survey Techniques of Water- Resources Investigations, Book 5, Chapter A3, 90 p.
Wood, W.W, 1976, Guidelines for collection and field analyses of ground-water samples for selected unstable constituents: U.S. Geological Survey Techniques of Water-Resources Investigations, Book 1, Chapter D2, 24 p.
References
Tabl
e 3.
C
once
ntra
tion
of s
elec
ted
wat
er-q
ualit
y pa
ram
eter
s de
term
ined
from
test
wel
l in
Bar
celo
neta
, P
uerto
Ric
o[°
C, d
egre
es C
elsi
us;
fiS/
cm, m
icro
siem
ens
per
cent
imet
er a
t 25
degr
ees
Cel
sius
; m
g/L
, mill
igra
ms
per l
iter;
mg/
L, m
icro
gram
s pe
r lite
r; <,
con
cent
ratio
n be
low
det
ectio
n lim
its;
conc
entr
atio
n no
t det
erm
ined
; (*
), w
ell
open
hol
e fr
om 1
158
to 1
800
feet
]
DA
TE
SEP
1995
14...
26...
NO
V 1
995
29...
DA
TE
SEP
1995
14...
26...
NO
V 1
995
29...
DA
TE
SEP
1995
14...
26...
NO
V 1
9
29...
DE
PTH
OF
WE
LL
,T
OT
AL
(FE
ET
)
440
1780
1158
(*)
CH
LO
R
IDE
, DIS
SO
LV
ED
(MG
/L A
SC
L)
10 14 12
NIT
RO
G
EN
,N
O2+
NO
3TO
TA
L(M
G/L
AS
N)
0.34
1.3
0.88
pH W
ATE
RW
HO
LE
LA
B(S
TA
-D
AR
DU
NIT
S)
7.4
7.3
7.6
SUL
FAT
ED
IS
SOL
VE
D(M
G/L
AS
SO4)
13 39 21
NIT
RO
G
EN
,N
ITR
ITE
-D
IS
SOL
VE
D(M
G/L
AS
N)
0.01
0.01
0.02
TE
MPE
RA
T
UR
EW
AT
ER
(DE
C °
C)
24.5
24.5
23.5
FLU
O-
RID
E,
DIS
SO
LV
ED
(MG
/LA
SF
)
<0.
10
0.50
-
NIT
RO
G
EN
,N
ITR
ITE
TO
TA
L(M
G/L
AS
N)
0.01
0.01
0.03
SPE
CIF
IC-
CO
ND
UC
T
AN
CE
(uS/
CM
)
450
450
475
SIL
ICA
DIS
SOL
VE
D(M
G/L
AS
SIO
2)
5.2
6.4
-
NIT
RO
G
EN
,N
ITR
AT
ED
IS
SOL
VE
D(M
G/L
AS
N)
0.35
1.3
0.72
AL
KA
LIN
IT
Y L
AB
(MG
/L A
SC
AC
O3)
210
232
243
NIT
RO
G
EN
,T
OT
AL
(MG
/LA
SN
)
0.54
2.4
1.6
NIT
RO
G
EN
,N
ITR
AT
ET
OT
AL
(MG
/LA
SN
)
0.33
1.3
0.88
HA
RD
N
ESS
TO
TA
L(M
G/L
AS
CA
CO
3)
240
260 -
NIT
RO
G
EN
,T
OT
AL
(MG
/LA
S N
O3)
2.4
11.0
7.1
NIT
RO
G
EN
,N
ITR
AT
ED
IS
SOL
VE
D(M
G/L
AS
NO
3)
1.5
5.7
0.70
CA
LC
IUM
DIS
SOL
VE
D(M
G/L
AS
CA
)
83 70 -
NIT
RO
G
EN
, A
M
MO
NIA
+O
RG
AN
ICT
OT
AL
(MG
/LA
SN
)
0.2
1.1
0.71
NIT
RO
G
EN
,N
ITR
AT
ET
OT
AL
(MG
/LA
SN
O3
1.5
5.7
0.85
MA
GN
E
SIU
M,
DIS
SOL
VE
D(M
G/L
AS
MG
)
7.9
20 -
NIT
RO
G
EN
,A
MM
O
NIA
DIS
SO
LV
ED
(MG
/LA
SN
)
0.04
1.2
0.80
PHO
SPH
OR
US
TO
TA
L(M
G/L
AS
P)
0.02
0.02
0.02
SOD
IUM
DIS
SOL
VE
D(M
G/L
AS
NA
)
6.3
15 -
NIT
RO
G
EN
,A
MM
O
NIA
TO
TA
L(M
G/L
AS
N)
0.01 1.5
0.80
PHO
SPH
OR
US
OR
TH
O,
SOL
VE
D(M
G/L
AS
P) 0.02
0.01
0.01
SO
DIU
MA
DSO
RP
TIO
NR
AT
IO
0.2
0.4
-
NIT
RO
G
EN
,A
MM
O
NIA
DIS
SO
LV
ED
(MG
/LA
S N
H4)
- 1.5
1.0
AR
SEN
ICD
IS
SOL
VE
D(u
C/L
AS
AS)
<1
1 1
SOD
IUM
PER
CE
NT
5 11 -
NIT
RO
G
EN
,A
MM
O
NIA
TO
TA
L(M
G/L
AS
NH
4)
- 1.5
1.0
BA
RIU
MD
IS
SOL
VE
D(u
G/L
AS
BA
)
9 23
<10
0
POT
AS
SIU
M,
DIS
SOL
VE
D(M
G/L
AS
K)
0.60
1.2
0.60
NIT
RO
G
EN
,N
O2+
NO
3D
IS
SOL
VE
D(M
G/L
AS
N)
0.36
1.3
0.72
BE
RY
L
LIU
M,
DIS
SOL
VE
D(l
lG/L
AS
BE
)
<0.5 0.
5
..
Tabl
e 3.
C
once
ntra
tion
of s
elec
ted
wat
er q
ualit
y pa
ram
eter
s de
term
ined
from
test
wel
l at
Bar
celo
neta
, P
uerto
Ric
o-C
ontin
ued
DA
TE
SEP
1995
14...
26...
NO
V 1
995
29...
DA
TE
SEP
1995
14...
26...
NO
V 1
995
29...
DA
TE
SEP
1995
14...
26...
NO
V 1
995
29...
BO
RO
N,
DIS
SOL
VE
D(|l
G/L
AS
B)
30 30 30
VA
NA
D
IUM
,D
IS
SOL
VE
D(M
G/L
)A
SV
)
<6 8 -
BE
NZ
EN
E1,
4-D
I-
CH
LO
RO
-W
AT
ER
UN
FLT
RD
RE
C (
jiG/L
)
<3.
0
<5.
0
<5.
0
CA
D
MIU
M D
IS
SOL
VE
D(|l
G/L
AS
CD
)
<1.0
<1.0
<1.0
ZIN
C,
DIS
SOL
VE
D(M
G/L
)A
SZ
N)
<3 <3 <10
2,4,
6- T
RI-
CH
LO
RO
-PH
EN
OL
TO
TA
L(M
G/L
)
<20
.0
<20.
0
<20
.0
CH
RO
M
IUM
,D
IS
SOL
VE
D(|l
G/L
AS
CR
)
<5 <5 <1
LIT
HIU
MD
IS
SOL
VE
D(M
G/L
)A
S L
I)
<4 <4 -
2,4-
DI-
CH
LO
RO
-PH
EN
OL
TO
TA
L(M
G/L
)
<5.0
<5.
0
<5.0
CO
BA
LT
,D
IS
SOL
VE
D(|l
G/L
AS
CO
)
<3 <3 --
SEL
E
NIU
M,
DIS
SOL
VE
D(M
G/L
AS
SE
)
<1 <2 <1
2,4-
DI-
ME
TH
YL
-PH
EN
OL
TO
TA
L(M
G/L
)
<5.0
<5.0
<5.0
CO
PPE
R,
DIS
SOL
VE
D(|l
G/L
AS
CU
)
<10
<10 <1 IOD
IDE
,D
IS
SOL
VE
D(M
G/L
AS
I)
0.00
2
0.03
9
0.02
7
2,4,
- D
I-N
ITR
O-
PHE
NO
LT
OT
AL
(MG
/L)
<20
.0
<20.
0
<20.
0
IRO
N,
DIS
SOL
VE
D(|l
G/L
AS
FE
)
<3
5
<10
BR
OM
ID-
ED
IS-
SOL
VE
D(M
G/L
AS
BR
)
0.05
0
0.03
0
0.05
0
2,4-
DI-
NIT
RO
-T
OL
U-
EN
ET
OT
AL
(MG
/L)
<5.
0
<5.
0
<5.
0
LE
AD
,D
IS
SOL
VE
D(|l
G/L
AS
PB
)
<10 20 <1
ME
R
CU
RY
DIS
SOL
VE
D(\
iG/L
AS
HG
)
<0.1
<0.1 0.2
2,6-
DI-
NIT
RO
-T
OL
UE
NE
TO
TA
L(M
G/L
)
<5.0
<5.0
<5.0
MA
NG
A
NE
SE,
DIS
SOL
VE
D(|l
G/L
AS
MN
)
2 13
<10
BE
NZ
EN
E1,
2,4-
TR
I-C
HL
OR
O-
WA
T U
NF
RE
C(H
G/L
)
<3.0
<5.0
<5.0
2- CH
LO
RO
-N
APH
-T
HA
LE
NE
TO
TA
L(M
G/L
)
<5.0
<5.0
<5.0
MO
LY
B
DE
NU
M,
DIS
SOL
VE
D(|l
G/L
AS
MO
)
<10 30 -
1,2,
5,6
-DIB
EN
Z-
AN
TH
RA
-C
EN
ET
OT
AL
(HG
/L)
<10.
0
<10
.0
<10.
0
2- CH
LO
RO
-PH
EN
OL
TO
TA
L(M
G/L
)
<5.
0
<5.
0
<5.
0
NIC
KE
L,
DIS
SOL
VE
D(|l
G/L
AS
NI)
<10
<10 -
BE
NZ
EN
EO
-
CH
LO
RO
-W
AT
ER
UN
FLT
RD
RE
C(M
G/L
)
<3.
0
<5.
0
<5.
0
2-N
ITR
O-
PH
EN
OL
TO
TA
L(M
G/L
)
<5.0
<5.
0
<5.
0
SIL
VE
R,
DIS
SOL
VE
D(|l
G/L
AS
AG
)
<1.
0
<1.
0
<1.
0
1,2-
DI-
PHE
NY
L-
HY
DR
A-
ZIN
EW
AT
ER
TOT.
RE
C(M
G/L
)
<5.0
<5.0
<5.0
3,3'
-DI-
CH
LO
RO
-B
EN
ZI-
DIN
ET
OT
AL
(MG
/L)
<20
.0
<20
.0
<20
.0
STR
ON
T
IUM
,D
IS
SOL
VE
D(|l
G/L
AS
SR
)
790
6400 -
BE
NZ
EN
E1,
3-D
I-
CH
LO
RO
-W
ATE
RU
NFL
T
RD
RE
C(M
G/L
)
<3.0
<5.
0
<5.0
4,6-
DIN
I-T
RO
-
OR
TH
O-
CR
ESO
LT
OT
AL
(MG
/L)
<30.
0
<30.
0
<30.
0
Tabl
e 3.
C
once
ntra
tion
of s
elec
ted
wat
er q
ualit
y pa
ram
eter
s de
term
ined
from
test
wel
l at
Bar
celo
neta
, P
uerto
Ric
o-C
ontin
ued
DA
TE
SEP
1995
29...
29...
NO
V 1
995
DA
TE
SEP
1995
14...
26...
NO
V 1
995
29...
DA
TE
SEP
1995
14...
26...
NO
V19
95
4-B
RO
MO
-
PHE
NY
LPH
EN
YL
ET
HE
RT
OT
AL
(HG
/L)
<5.
0
<5.0
<5.0
BIS
(2-
CH
LO
RO
-E
TH
OX
Y)
ME
TH
AN
ET
OT
AL
(H-G
/L)
<5.0
<5.
0
<5.
0
FL
UO
RA
N-
TH
EN
ET
OT
AL
OlG
/L)
<5.
0
<5.
0
4-
CH
LO
RO
-PH
EN
YL
PHE
NY
LE
TH
ER
TO
TA
L(H
G/L
)
<20
.0
<20
.0
<5.0
BIS
2-C
HL
OR
O-
ET
HY
LE
TH
ER
TO
TA
L(H
-G/L
)
<5.0
<5.0
<5.0
FLU
O-
RE
NE
TO
TA
LO
lG/L
)
<5.0
<5.0
4-N
ITR
O-
PHE
NO
LT
OT
AL
OlG
/L)
<5.0
<5.0
<30.
0
BIS
(2-
CH
LO
RO
-IS
O-
PRO
PYL
)E
TH
ER
TO
TA
LO
lG/L
)
<5.0
<5.0
<5.0
HE
XA
-C
HL
OR
O-
BE
NZ
EN
ET
OT
AL
OlG
/L)
<5.0
<5.0
AC
E-
NA
PHT
H-
EN
ET
OT
AL
(HG
/L)
<5.0
<5.0
<5.0
BIS
(2-
ET
HY
LH
EX
YL
)PH
TH
AL
-A
TE
TO
TA
LQ
lG/L
)
<5.0
<5.0
<5.0
HE
XA
-C
HL
OR
O-
BU
TA
DI-
EN
ET
OT
AL
OlG
/L)
<3.0
<5.0
AC
E-
NA
PHT
H-
YL
EN
ET
OT
AL
OlG
/L)
<20.
0
<20.
0
<5.0
N-B
UT
YL
BE
NZ
YL
PHT
HA
-L
AT
ET
OT
AL
(HCV
L)
<5.0
<5.0
<5.0
HE
XA
-C
HL
OR
O-
CY
CL
O-
PEN
TA
DI-
EN
ET
OT
AL
(HG
/L)
<5.0
<5.0
AN
TH
RA
C
EN
ET
OT
AL
(HG
/L)
<5.0
<5.0
<5.0
PAR
A-
CH
LO
RO
-M
ET
AC
RE
SOL
TO
TA
L(M
-G/L
)
<30.
0
<30.
0
<30.
0
HE
XA
-C
HL
OR
O-
ET
HA
NE
TO
TA
L(M
-G/L
)
<5.
0
<5.
0
BE
NZ
I-D
INE
TO
TA
L(M
-G/L
)
<5.0
<5.0
<40.
0
CH
RY
-SE
NE
TO
TA
L(M
-CVL
)
<10.
0
<10.
0
<10.
0
IND
EN
O(1
,2,3
-CD
)PY
RE
NE
TO
TA
L(M
G/L
)
<10.
0
<10.
0
BE
NZ
O-
A-
PYR
EN
ET
OT
AL
(M-G
/L)
<5.0
<5.0
<10.
0
DI-
N-
BU
TY
LPH
TH
A-
LA
TE
TO
TA
L(H
-G/L
)
<5.0
<5.0
<5.0
ISO
-
PHO
R-
ON
ET
OT
AL
(M-G
/L)
<5.0
<5.0
BE
NZ
O B
FLU
OR
AN
-T
HE
NE
TO
TA
L(H
G/L
)
<5.0
<5.0
<10.
0
DI-
N-
OC
TY
LPH
TH
A-
LA
TE
TO
TA
L(M
-G/L
)
<10
.0
<10.
0
<10.
0
N-N
ITR
O-
SOD
I-N
-
PRO
PYL
-A
MIN
ET
OT
AL
OiG
/L)
<5.0
<5.0
BE
NZ
O K
FLU
O-
RA
N-
TH
EN
ET
OT
AL
(M-G
/L)
<5.0
<5.0
<10
.0
DIE
TH
YL
PHT
HA
-L
AT
ET
OT
AL
(M-G
/L)
<5.0
<5.0
<5.0
N-N
ITR
O--
SOD
I-M
ET
HY
LA
MIN
ET
OT
AL
(jlG
/L)
<5.0
<5.0
BE
NZ
O A
A
NT
HR
A
CE
NE
1.2-
BE
N-
ZA
NT
HR
AC
EN
ET
OT
AL
(M-G
/L)
<20
.0
<20
.0
<10
.0
DI
ME
TH
YL
PHT
HA
-L
AT
ET
OT
AL
(M-G
/L)
<5.
0
<5.
0
<5.
0
N-N
ITR
O -
SOD
I-PH
EN
Y-
LA
MIN
ET
OT
AL
(M-G
/L)
<5.
0
<5.
0
BE
N-
ZO
GH
PE
RY
LE
NE
1.12
-
BE
NZ
OP
ER
YL
EN
ET
OT
AL
OlG
/L)
<30.
0
<30
.0
<10.
0
29...
<5.0
<5.0
<5.0
<5.0
<5.0
<5.
0<1
0.0
<5.0
<5.0
<5.0
<5.
0
Tabl
e 3.
C
once
ntra
tion
of s
elec
ted
wat
er q
ualit
y pa
ram
eter
s de
term
ined
from
test
wel
l at
Bar
celo
neta
, P
uerto
Ric
o-C
ontin
ued
DA
TE
SEP
1995
14...
26...
NO
V 1
995
29...
DA
TE
SEP
1995
14...
26...
NO
V 1
995
29...
DA
TE
SEP
1995
14...
26...
NO
V 1
995
E
29 .
..(D
NA
PHT
H
AL
EN
ET
OT
AL
(MG
/L)
<3.0
<5.0
<5.0
BE
NZ
EN
ET
OT
AL
(MG
/L)
<3.0
<3.0
<3.0
1,1,
1-T
RI-
CH
LO
RO
-E
TH
AN
ET
OT
AL
(MG
/L)
<3.0
<3.0
<3.0
NIT
RO
B
EN
ZE
NE
TO
TA
L(M
G/L
)
<5.0
<5.0
<5.0
CH
LO
RO
-B
EN
ZE
NE
TO
TA
L(M
G/L
)
<3.0
<3.0
<3.0
1,1,
2-T
RI-
CH
LO
RO
-E
TH
AN
ET
OT
AL
(MG
/L)
<3.0
<3.0
<3.0
PEN
TA
-C
HL
OR
O-
PHE
NO
LT
OT
AL
(^G
/L)
<30.
0
<30.
0
<30.
0
CH
LO
RO
-E
TH
AN
ET
OT
AL
(MG
/L)
<3.0
<3.0
<3.0
ET
HA
NE
,1,
1,2,
2T
ET
RA
-C
HL
OR
O-
WA
T U
NF
RE
C (M
G/L
)
<3.0
<3.0
<3.0
BR
O-
MO
ME
-T
HA
NE
WA
TER
WH
OL
ER
EC
OV
ER
(MG
/L)
<3.0
<3.0
<3.0
ET
HY
L-
BE
NZ
EN
ET
OT
AL
(MG
/L)
<3.0
<3.0
<3.0
1,2-
DI-
CH
LO
RO
-PR
OPA
NE
TO
TA
L(M
G/L
)
<3.0
<3.0
<3.0
DI-
C
HL
OR
O-
BR
OM
O-
ME
TH
-A
NE
TO
TA
L(M
G/L
)
<3.0
<3.0
<3.0
ME
TH
YL
-B
RO
M
IDE
TO
TA
L(M
G/L
)
<3.0
<3.0
<3.0
1,2-
TR
AN
SDI
CH
LO
RO
-E
TH
EN
ET
OT
AL
(MG
/L)
<3.0
<3.0
<3.0
DI-
C
AR
BO
N-
TE
TR
A-
CH
LO
-R
IDE
TO
TA
L(M
G/L
)
<3.0
<3.0
<3.0
ME
TH
YL
-C
HL
O
RID
ET
OT
AL
(MG
/L)
<3.0
<3.0
<3.0
2- CH
LO
RO
-E
TH
YL
-V
INY
L-
ET
HE
RT
OT
AL
(MG
/L)
<3.0
<3.0
<3.0
1,2-
DI-
CH
LO
RO
-E
TH
AN
ET
OT
AL
(MG
/L)
<3.0
<3.0
<3.0
ME
TH
YL
-E
NE
CH
LO
R
IDE
TO
TA
L(M
G/L
)
<3.0
<3.0
<3.0
DI-
CH
LO
RO
-D
I-
FLU
OR
O-
ME
TH
-A
NE
TO
TA
L(M
G/L
)
<3.0
<3.0
<3.0
BR
OM
O-
FOR
MT
OT
AL
(MG
/L)
<3.0
<3.0
<3.0
TE
TR
A-
CH
LO
RO
-E
TH
YL
-E
NE
TO
TA
L(M
G/L
)
<3.0
<3.0
<3.0
TR
AN
S-1,
3-D
I-
CH
LO
RO
-PR
OPE
NE
TO
TA
L(M
G/L
)
<3.0
<3.0
<3.0
CH
LO
RO
-D
I-B
RO
MO
-M
ET
HA
NE
TO
TA
L(M
G/L
)
<3.0
<3.0
<3.0
TR
I-C
HL
OR
O-
FLU
OR
O-
ME
TH
AN
ET
OT
AL
(MG
/L)
<3.0
<3.0
<3.0
CIS
1,3
-DI-
CH
LO
RO
-PR
OPE
NE
TO
TA
L(M
G/L
)
<3.0
<3.0
<3.0
CH
LO
RO
FO
RM
TO
TA
L(M
G/L
)
<3.0
<3.0
<3.0
1,1-
DI-
CH
LO
RO
-E
TH
AN
ET
OT
AL
(MG
/L)
<3.0
<3.0
<3.0
VIN
YL
CH
LO
R
IDE
TO
TA
L(H
G/L
)
<1.0
<1.0
<1.0
TO
LU
E
NE
TO
TA
L(M
G/L
)
<3.0
<3.0
<3.0
1,1-
DI-
CH
LO
RO
-E
TH
YL
-E
NE
TO
TA
L(M
G/L
)
<3.0
<3.0
<3.0
TR
I-
CH
LO
RO
-E
TH
YL
-E
NE
TO
TA
L(M
G/L
)
<3.0
<3.0
<3.0
Tabl
e 3.
C
once
ntra
tion
of s
elec
ted
wat
er q
ualit
y pa
ram
eter
s de
term
ined
from
test
wel
l at
Bar
celo
neta
, P
uerto
Ric
o-C
ontin
ued
DA
TE
SEP
1995
14...
26...
NO
V 1
995
29...
DA
TE
SEP
1995
14...
26...
NO
V 1
995
29...
DA
TE
SEP
1995
14...
26...
NO
V 1
995
29...
CIS
- 1,2
-D
I-C
HL
OR
O-
ET
HE
NE
WA
TE
RT
OT
AL
(M-G
/L)
<3.
0
<3.
0
<3.0
BE
NZ
EN
ESE
CB
UT
YL
-W
AT
ER
UN
FLT
RD
REC
(M.G/
L)
<3.0
<3.0
<3.
0
DIB
RO
MO
CH
LO
RO
-PR
OPA
NE
WA
TE
RW
HO
LE
-T
OT
.RE
C(M
-G/L
)
<3.0
<3.
0
<3.0
STY
RE
NE
TO
TA
L(M
-G/L
)
<3.0
<3.0
<3.0
BE
NZ
EN
ET
ER
T-
BU
TY
L-
WA
TE
RU
NFL
TR
DR
EC
(M
-G/L
)
<3.0
<3.0
<3.0
CH
LO
R-
PYR
IFO
ST
OT
AL
RE
CO
VE
R(M
-G/L
)
<0.0
1
<0.0
1
<0.0
1
2,2-
DI
CH
LO
RO
-PR
OPA
NE
WA
T, W
HT
OT
AL
(M-G
/L)
<3.0
<3.0
<3.0
P-IS
O-
PRO
PYL
-T
OL
UE
NE
WA
TE
RW
HO
LE
REC
(M.G/
L)
<3.0
<3.0
<3.0
DI-
SYST
ON
TO
TA
L(M
-G/L
)
<0.0
1
-- <0.0
1
1,3-
DI-
CH
LO
RO
-PR
OPA
NE
WA
T, W
HT
OT
AL
(M-G
/L)
<3.0
<3.0
<3.0
123-
TR
IC
HL
OR
O-
PRO
PAN
EW
ATE
RW
HO
LE
TO
TA
L(M
-G/L
)
<3.0
<3.0
<3.0
PHO
RA
TE
TO
TA
LO
iG/L
)
<0.0
1
<0.0
3
<0.0
1
PSE
UD
O-
CU
ME
NE
WA
TE
RU
NFL
TR
DR
EC
(M-G
/L)
<3.0
<3.0
<3.0
ET
HA
NE
,11
12-
TE
TR
A-
CH
LO
RO
-W
AT
UN
FR
EC
(M-G
/L)
<3.0
<3.0
<3.0
PER
-
TH
AN
ET
OT
AL
([iC/
L)
<0.1
<0.1
<0.1
ISO
-
PRO
PYL
-B
EN
-
ZE
NE
WA
TER
WH
OL
ER
EC
(M.G/
L)
<3.0
<3.0
<3.0
1,2,
3-T
RI-
CH
LO
RO
BE
N
ZE
NE
WA
T, W
HR
EC
(M-G
/L)
<3.0
<3.0
<3.0
DB
FT
OT
AL
(HG
/L)
<0.0
1
<0.0
1
<0.0
1
BE
NZ
EN
EN
-PR
OPY
WA
TE
RU
NFL
TR
DR
EC
(M.G/
L)
<3.0
<3.0
<3.0
1,2-
DIB
RO
MO
ET
HA
NE
WA
TE
RW
HO
LE
TO
TA
L(M
-G/L
)
<3.0
<3.0
<3.0
NA
PH
TH
A
LE
NE
S,PO
LY-
CH
LO
R.
TO
TA
L(M
-G/L
)
<0.1
0
<0.1
0
<0.1
0
ME
SIT
-Y
LE
NE
WA
TER
UN
FLT
RD
RE
C(M
.G/L)
<3.0
<3.0
<3.0
FRE
ON
-11
3W
ATE
RU
NFL
TR
DR
EC
(M-G
/L)
<3.0
<3.0
<3.0
AL
DR
IN,
TO
TA
L(M
-G/L
)
<0.0
10
<0.0
10
<0.0
10
o- CH
LO
RO
-T
OL
UE
NE
WA
TE
RW
HO
LE
TO
TA
L(M
.G/L)
<3.0
<3.
0
<3.
0
ME
TH
YL
ET
HE
RT
ER
T-
BU
TY
LW
AT
UN
FR
EC
(M
-G/L
)
<3.
0
<3.0
<3.0
LIN
DA
NE
TO
TA
L(M
-G/L
)
<0.
010
<0.
010
<0.
010
ME
T-
LA
NE
BR
OM
OC
HL
OR
O-
WA
TU
NFL
TR
DR
EC
(M.G/
L)
<3.0
0
<3.0
0
<3.
00
XY
LE
NE
WA
TE
RU
NFL
TR
DR
EC
(M-G
/L)
<3.0
<3.0
<3.0
CH
LO
R-
DA
NE
,T
OT
AL
(M-G
/L)
<0.1
<0.1
<0.1
BE
N
ZE
NE
N-
BU
TY
LW
AT
ER
UN
FL
TR
D R
EC
(M.G/
L)
<3.0
<3.
0
<3.0
BR
OM
O-
BE
N-
ZE
NE
WA
TE
R,
WH
OL
E,
TO
TA
L(M
.G/L)
<3.
0
<3.0
<3.
0
DD
D,
TO
TA
L(M
-G/L
)
<0.
010
<0.
010
<0.
010
Tabl
e 3.
C
once
ntra
tion
of s
elec
ted
wat
er q
ualit
y pa
ram
eter
s de
term
ined
from
test
wel
l at
Bar
celo
neta
, P
uerto
Ric
o-C
ontin
ued
DA
TE
SEP
1995
14...
26...
NO
V 1
995
29...
DA
TE
SEP
1995
14...
26...
NO
V 1
995
29...
DD
E,
TO
TA
L(H
G/L
)
<0.0
10
<0.0
10
<0.0
10
MA
LA
-T
HIO
N,
TO
TA
L(H
G/L
)
<0.0
1
<0.0
1
<0.0
1
DD
T,
TO
TA
L(H
G/L
)
<0.0
10
<0.0
10
<0.0
10
PAR
A-
TH
ION
,T
OT
AL
(HG
/L)
<0.0
1
<0.0
1
<0.0
1
DI-
EL
DR
INT
OT
AL
(HG
/L)
<0.0
10
<0.0
10
<0.0
10
DI-
AZ
INO
N,
TO
TA
L(H
G/L
)
<0.0
1
<0.0
1
<0.0
1
EN
DO
-SU
LFA
N,
TO
TA
L(H
G/L
)
<0.0
10
<0.0
10
<0.0
10
ME
TH
YL
PAR
A-
TH
ION
,T
OT
AL
(HG
/L)
<0.0
1
<0.0
1
<0.0
1
EN
DR
INW
AT
ER
UN
FLT
RD
RE
C(H
G/L
)
<0.0
10
<0.0
10
<0.0
10
MIR
EX
,T
OT
AL
(HG
/L)
<0.0
1
<0.0
1
<0.0
1
ET
HIO
N,
TO
TA
L(H
G/L
)
<0.0
1
<0.0
1
<0.0
1
TO
TA
LT
RIT
HIO
N(H
G/L
)
<0.0
1
<0.0
2
<0.0
1
TO
X-
APH
EN
E,
TO
TA
L(H
G/L
)
<1 <1 <1
FON
OFO
S(D
Y-
FON
AT
EW
AT
ER
WH
OL
ET
OT
.RE
C(H
G/L
)
<0.0
1
<0.0
1
<0.0
1
HE
PTA
-C
HL
OR
,T
OT
AL
(HG
/L)
<0.0
10
<0.0
10
<0.0
10
1,1-
DI
CH
LO
RO
-PR
O-
PEN
E,
WA
T, W
HT
OT
AL
(HG
/L)
<3.0
<3.0
<3.0
HE
PTA
- M
ET
H-
CH
LO
R
OX
Y-
EPO
XID
E-
CH
LO
R,
PCB
,T
OT
AL
T
OT
AL
T
OT
AL
(HG
/L)
(HG
/L)
(HG
/L)
<0.
010
<0.0
1 <0
.1
<0.
010
<0.0
1 <0
.1
<0.
010
<0.0
1 <0
.1
TO
LU
EN
EP-
CH
LO
RW
AT
ER
UN
FLT
RD
RE
C (
HG
/L)
<3.
0
<3.0
<3.
0