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 Chief

U.S. Geological Survey

GSA Center, Suite 400-15

651 Federal Drive

Guaynabo, 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 the

test 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 well

in 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°30' ~

18°22'30"' ~

v )*^^<^\ .\.;x.4'I<; x"-"?*'' \

/HI?*/ ** » ^ £' s>_>^ .%'J^-*'**^ JiTv'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>-;: **** &

Base from US Geological Survey Puerto Rico e Islas Limitrofes, 

scale: 1:120,000,1951 edition.

2.5 5 KILOMETERS

2.5 5 MILES

EXPLANATION 

® Location of artesian wells 

+ Location of test hole

Study area

Location of study area in Puerto Rico

Figure 1. Location of artesian wells on the north coast of Puerto Rico.
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 flushjointed, 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

,_ 400

LiJ 

LU 

LL

Z

SURFACE, LAND 

oo a> 0o 

£

3 1,000

LJJ 

CO

g 1,200

1,400

1,600

1,800 

-2C

i

-

-

-

-

i

-

Confining 

Unit

-

Artesian Aquifer -

i i

)0 -100 0 +100 +200

-

-

-

t

4

4

i

Confining 

Unit

-

-

-

-

-

-

-

-

+300 10° 101 102 103 104 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 groundwater 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 waterquality 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 

PRoman-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 WaterResources 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
Table 3. Concentration of selected water-quality parameters determined from test well in Barceloneta, Puerto 

[°C, degrees Celsius; fiS/cm, microsiemens per centimeter at 25 degrees Celsius; mg/L, milligrams per liter; mg/L, micrograms per liter; <, c

concentration not determined; (*), well open hole from 1158 to 1800 feet]

DATE

SEP 1995

14...

26...

NOV 1995

29...

DATE

SEP 1995

14...

26...

NOV 1995

29...

DATE

SEP 1995

14...

26...

NOV 19

29...

DEPTH

OF WELL,

TOTAL

(FEET)

440

1780

1158(*)

CHLORIDE, DISSOLVED

(MG/L AS

CL)

10

14

12

NITROGEN,

NO2+NO3T

OTAL

(MG/L

ASN)

0.34

1.3

0.88

pH WATER

WHOLE

LAB

(STADARD

UNITS)

7.4

7.3

7.6

SULFATE

DISSOLVED

(MG/L

AS SO4)

13

39

21

NITROGEN,

NITRITEDISSOLVED

(MG/L

ASN)

0.01

0.01

0.02

TEMPERATURE

WATER

(DEC °C)

24.5

24.5

23.5

FLUORIDE, DISSOLVED

(MG/L

ASF)

<0.10

0.50

-

NITROGEN,

NITRITE

TOTAL

(MG/L

ASN)

0.01

0.01

0.03

SPECIFICCONDUCTANCE

(uS/CM)

450

450

475

SILICA

DISSOLVED

(MG/L

AS SIO2)

5.2

6.4

-

NITROGEN,

NITRATE

DISSOLVED

(MG/L

ASN)

0.35

1.3

0.72

ALKALINITY LAB

(MG/L AS

CACO3)

210

232

243

NITROGEN,

TOTAL

(MG/L

ASN)

0.54

2.4

1.6

NITROGEN,

NITRATE

TOTAL

(MG/L

ASN)

0.33

1.3

0.88

HARDNESS

TOTAL

(MG/L AS

CACO3)

240

260

-

NITROGEN,

TOTAL

(MG/L

AS NO3)

2.4

11.0

7.1

NITROGEN,

NITRATE

DISSOLVED

(MG/L

AS NO3)

1.5

5.7

0.70

CALCIUM

DISSOLVED

(MG/L

ASCA)

83

70

-

NITROGEN, AMMONIA +

ORGANIC

TOTAL

(MG/L

ASN)

0.2

1.1

0.71

NITROGEN,

NITRATE

TOTAL

(MG/L

ASNO3

1.5

5.7

0.85

MAGNESIUM,

DISSOLVED

(MG/L

ASMG)

7.9

20

-

NITROGEN,

AMMONIA DISSOLVED

(MG/L

ASN)

0.04

1.2

0.80

PHOSPHORUS

TOTAL

(MG/L

ASP)

0.02

0.02

0.02

SODIUM

DISSOLVED

(MG/L

ASNA)

6.3

15

-

NITROGEN,

AMMONIA TOTAL

(MG/L

ASN)

0.01

1.5

0.80

PHOSPHORUS

ORTHO,

SOLVED

(MG/L

ASP)

0.02

0.01

0.01
Table 3. Concentration of selected water quality parameters determined from test well at Barceloneta, Puerto 

DATE

SEP 1995

14...

26...

NOV 1995

29...

DATE

SEP 1995

14...

26...

NOV 1995

29...

DATE

SEP 1995

14...

26...

NOV 1995

29...

BORON,

DISSOLVED

(|lG/L

ASB)

30

30

30

VANADIUM,

DISSOLVED

(MG/L)

ASV)

<6

8

-

BENZENE

1,4-DICHLOROWATER

UNFLTRD

REC (jiG/L)

<3.0

<5.0

<5.0

CADMIUM DISSOLVED

(|lG/L

AS CD)

<1.0

<1.0

<1.0

ZINC,

DISSOLVED

(MG/L)

ASZN)

<3

<3

<10

2,4,6- TRICHLOROPHENOL

TOTAL

(MG/L)

<20.0

<20.0

<20.0

CHROMIUM,

DISSOLVED

(|lG/L

ASCR)

<5

<5

<1

LITHIUM

DISSOLVED

(MG/L)

AS LI)

<4

<4

-

2,4-DICHLOROPHENOL

TOTAL

(MG/L)

<5.0

<5.0

<5.0

COBALT,

DISSOLVED

(|lG/L

AS CO)

<3

<3

--

SELENIUM,

DISSOLVED

(MG/L

ASSE)

<1

<2

<1

2,4-DIMETHYLPHENOL

TOTAL

(MG/L)

<5.0

<5.0

<5.0

COPPER,

DISSOLVED

(|lG/L

ASCU)

<10

<10

<1

IODIDE,

DISSOLVED

(MG/L

AS I)

0.002

0.039

0.027

2,4,- DINITROPHENOL

TOTAL

(MG/L)

<20.0

<20.0

<20.0

IRON,

DISSOLVED

(|lG/L

ASFE)

<3

5

<10

BROMIDEDISSOLVED

(MG/L

ASBR)

0.050

0.030

0.050

2,4-DINITROTOLUENE

TOTAL

(MG/L)

<5.0

<5.0

<5.0

LEAD,

DISSOLVED

(|lG/L

ASPB)

<10

20

<1

MERCURY

DISSOLVED

(\iG/L

ASHG)

<0.1

<0.1

0.2

2,6-DINITROTOLUENE

TOTAL

(MG/L)

<5.0

<5.0

<5.0

MANGANESE,

DISSOLVED

(|lG/L

ASMN)

2

13

<10

BENZENE

1,2,4-TRICHLOROWAT UNF

REC

(HG/L)

<3.0

<5.0

<5.0

2-

CHLORONAPHTHALENE

TOTAL

(MG/L)

<5.0

<5.0

<5.0

MOLYBDENUM,

DISSOLVED

(|lG/L

AS MO)

<10

30

-

1,2,5,6

-DIBENZANTHRACENE

TOTAL

(HG/L)

<10.0

<10.0

<10.0

2-

CHLOROPHENOL

TOTAL

(MG/L)

<5.0

<5.0

<5.0
Table 3. Concentration of selected water quality parameters determined from test well at Barceloneta, Puerto 

DATE

SEP 1995

29...

29...

NOV 1995

DATE

SEP 1995

14...

26...

NOV 1995

29...

DATE

SEP 1995

14...

26...

NOV

1995

4-BROMOPHENYL

PHENYL

ETHER

TOTAL

(HG/L)

<5.0

<5.0

<5.0

BIS (2-

CHLOROETHOXY)

METHANE

TOTAL

(H-G/L)

<5.0

<5.0

<5.0

FLUORANTHENE

TOTAL

OlG/L)

<5.0

<5.0

4- 

CHLOROPHENYL

PHENYL

ETHER

TOTAL

(HG/L)

<20.0

<20.0

<5.0

BIS2-

CHLOROETHYL

ETHER

TOTAL

(H-G/L)

<5.0

<5.0

<5.0

FLUORENE

TOTAL

OlG/L)

<5.0

<5.0

4-NITROPHENOL

TOTAL

OlG/L)

<5.0

<5.0

<30.0

BIS (2-

CHLOROISOPROPYL)

ETHER

TOTAL

OlG/L)

<5.0

<5.0

<5.0

HEXACHLOROBENZENE

TOTAL

OlG/L)

<5.0

<5.0

ACENAPHTHENE

TOTAL

(HG/L)

<5.0

<5.0

<5.0

BIS (2-

ETHYL

HEXYL)

PHTHALATE

TOTAL

QlG/L)

<5.0

<5.0

<5.0

HEXACHLOROBUTADIENE

TOTAL

OlG/L)

<3.0

<5.0

ACENAPHTHYLENE

TOTAL

OlG/L)

<20.0

<20.0

<5.0

N-BUTYL

BENZYL

PHTHALATE

TOTAL

(HCVL)

<5.0

<5.0

<5.0

HEXACHLOROCYCLOPENTADIENE

TOTAL

(HG/L)

<5.0

<5.0

ANTHRACENE

TOTAL

(HG/L)

<5.0

<5.0

<5.0

PARACHLOROMETA

CRESOL

TOTAL

(M-G/L)

<30.0

<30.0

<30.0

HEXACHLOROETHANE

TOTAL

(M-G/L)

<5.0

<5.0

BENZIDINE

TOTAL

(M-G/L)

<5.0

<5.0

<40.0

CHRYSENE

TOTAL

(M-CVL)

<10.0

<10.0

<10.0

INDENO

(1,2,3-CD)

PYRENE

TOTAL

(MG/L)

<10.0

<10.0

BENZOAPYRENE

TOTAL

(M-G/L)

<5.0

<5.0

<10.0

DI-NBUTYL

PHTHALATE

TOTAL

(H-G/L)

<5.0

<5.0

<5.0

ISOPHORONE

TOTAL

(M-G/L)

<5.0

<5.0

BENZO B

FLUORANTHENE

TOTAL

(HG/L)

<5.0

<5.0

<10.0

DI-NOCTYL

PHTHALATE

TOTAL

(M-G/L)

<10.0

<10.0

<10.0

N-NITROSODI-NPROPYLAMINE

TOTAL

OiG/L)

<5.0

<5.0

29... <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <10.0 <5.0 <5.0 
Table 3. Concentration of selected water quality parameters determined from test well at Barceloneta, Puerto 

DATE

SEP 1995

14...

26...

NOV 1995

29...

DATE

SEP 1995

14...

26...

NOV 1995

29...

DATE

SEP 1995

14...

26...

NOV 1995

E 29 ...

(D

NAPHTHALENE

TOTAL

(MG/L)

<3.0

<5.0

<5.0

BENZENE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

1,1,1-

TRICHLOROETHANE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

NITROBENZENE

TOTAL

(MG/L)

<5.0

<5.0

<5.0

CHLOROBENZENE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

1,1,2-TRICHLOROETHANE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

PENTACHLOROPHENOL

TOTAL

(^G/L)

<30.0

<30.0

<30.0

CHLOROETHANE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

ETHANE,

1,1,2,2

TETRACHLOROWAT UNF

REC (MG/L)

<3.0

<3.0

<3.0

BROMOMETHANE

WATER

WHOLE

RECOVER

(MG/L)

<3.0

<3.0

<3.0

ETHYLBENZENE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

1,2-DICHLOROPROPANE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

DICHLOROBROMOMETHANE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

METHYLBROMIDE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

1,2-

TRANSDI

CHLOROETHENE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

DICARBONTETRACHLORIDE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

METHYLCHLORIDE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

2-

CHLOROETHYLVINYLETHER

TOTAL

(MG/L)

<3.0

<3.0

<3.0

1,2-DICHLOROETHANE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

METHYLENE

CHLORIDE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

DICHLORODIFLUOROMETHANE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

BROMOFORM

TOTAL

(MG/L)

<3.0

<3.0

<3.0

TETRACHLOROETHYLENE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

TRANS1,3-DICHLOROPROPENE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

CHLORODIBROMOMETHANE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

TRICHLOROFLUOROMETHANE

TOTAL

(MG/L)

<3.0

<3.0

<3.0

CIS 1,3-DICHLOROPROPENE

TOTAL

(MG/L)

<3.0

<3.0

<3.0
Table 3. Concentration of selected water quality parameters determined from test well at Barceloneta, Puerto 

DATE

SEP 1995

14...

26...

NOV 1995

29...

DATE

SEP 1995

14...

26...

NOV 1995

29...

DATE

SEP 1995

14...

26...

NOV 1995

29...

CIS- 1,2 -DICHLOROETHENE

WATER

TOTAL

(M-G/L)

<3.0

<3.0

<3.0

BENZENE

SEC

BUTYLWATER

UNFLTRD

REC (M.G/L)

<3.0

<3.0

<3.0

DIBROMO

CHLOROPROPANE

WATER

WHOLETOT.REC

(M-G/L)

<3.0

<3.0

<3.0

STYRENE

TOTAL

(M-G/L)

<3.0

<3.0

<3.0

BENZENE

TERTBUTYLWATER

UNFLTRD

REC (M-G/L)

<3.0

<3.0

<3.0

CHLORPYRIFOS

TOTAL

RECOVER

(M-G/L)

<0.01

<0.01

<0.01

2,2-DI

CHLOROPROPANE

WAT, WH

TOTAL

(M-G/L)

<3.0

<3.0

<3.0

P-ISOPROPYLTOLUENE

WATER

WHOLE

REC (M.G/L)

<3.0

<3.0

<3.0

DISYSTON

TOTAL

(M-G/L)

<0.01

--

<0.01

1,3-DICHLOROPROPANE

WAT, WH

TOTAL

(M-G/L)

<3.0

<3.0

<3.0

123-TRI

CHLOROPROPANE

WATER

WHOLE

TOTAL

(M-G/L)

<3.0

<3.0

<3.0

PHORATE

TOTAL

OiG/L)

<0.01

<0.03

<0.01

PSEUDOCUMENE

WATER

UNFLTRD

REC

(M-G/L)

<3.0

<3.0

<3.0

ETHANE,

1112-

TETRACHLOROWATUNF

REC

(M-G/L)

<3.0

<3.0

<3.0

PERTHANE

TOTAL

([iC/L)

<0.1

<0.1

<0.1

ISOPROPYLBENZENE

WATER

WHOLE

REC

(M.G/L)

<3.0

<3.0

<3.0

1,2,3-TRICHLORO

BENZENE

WAT, WH

REC

(M-G/L)

<3.0

<3.0

<3.0

DBF

TOTAL

(HG/L)

<0.01

<0.01

<0.01

BENZENE

N-PROPY

WATER

UNFLTRD

REC

(M.G/L)

<3.0

<3.0

<3.0

1,2-

DIBROMO

ETHANE

WATER

WHOLE

TOTAL

(M-G/L)

<3.0

<3.0

<3.0

NAPHTHALENES,

POLYCHLOR.

TOTAL

(M-G/L)

<0.10

<0.10

<0.10

MESITYLENE

WATER

UNFLTRD

REC

(M.G/L)

<3.0

<3.0

<3.0

FREON113

WATER

UNFLTRD

REC

(M-G/L)

<3.0

<3.0

<3.0

ALDRIN,

TOTAL

(M-G/L)

<0.010

<0.010

<0.010

oCHLOROTOLUENE

WATER

WHOLE

TOTAL

(M.G/L)

<3.0

<3.0

<3.0

METHYL

ETHER

TERTBUTYL

WAT UNF

REC (M-G/L)

<3.0

<3.0

<3.0

LINDANE

TOTAL

(M-G/L)

<0.010

<0.010

<0.010
Table 3. Concentration of selected water quality parameters determined from test well at Barceloneta, Puerto 

DATE

SEP 1995

14...

26...

NOV 1995

29...

DATE

SEP 1995

14...

26...

NOV 1995

29...

DDE,

TOTAL

(HG/L)

<0.010

<0.010

<0.010

MALATHION,

TOTAL

(HG/L)

<0.01

<0.01

<0.01

DDT,

TOTAL

(HG/L)

<0.010

<0.010

<0.010

PARATHION,

TOTAL

(HG/L)

<0.01

<0.01

<0.01

DIELDRIN

TOTAL

(HG/L)

<0.010

<0.010

<0.010

DIAZINON,

TOTAL

(HG/L)

<0.01

<0.01

<0.01

ENDOSULFAN,

TOTAL

(HG/L)

<0.010

<0.010

<0.010

METHYL

PARATHION,

TOTAL

(HG/L)

<0.01

<0.01

<0.01

ENDRIN

WATER

UNFLTRD

REC

(HG/L)

<0.010

<0.010

<0.010

MIREX,

TOTAL

(HG/L)

<0.01

<0.01

<0.01

ETHION,

TOTAL

(HG/L)

<0.01

<0.01

<0.01

TOTAL

TRITHION

(HG/L)

<0.01

<0.02

<0.01

TOXAPHENE,

TOTAL

(HG/L)

<1

<1

<1

FONOFOS

(DYFONATE

WATER

WHOLE

TOT.REC

(HG/L)

<0.01

<0.01

<0.01

HEPTACHLOR,

TOTAL

(HG/L)

<0.010

<0.010

<0.010

1,1-DI

CHLOROPROPENE,

WAT, WH

TOTAL

(HG/L)

<3.0

<3.0

<3.0

HEPTA- 

CHLOR 

EPOXIDE- 

TOTAL 

(HG/L) 

<0.010 

<0.010 

<0.010 

TOLUENE

P-CHLOR

WATER

UNFLTRD

REC (HG/L)

<3.0

<3.0

<3.0