Reconnaissance of Ground-Water Quality in the Manati ...NC-9 Ojo de Agua Manati 3 Pugnado #1 Pugnado #2 Procter & Gamble Quebrada Rabanos Rio Arriba #2 Rio Arriba #3 Vega Baja #2 Vega

Reconnaissance of Ground-Water Quality in the Manati Quadrangle, Puerto Rico, August-November 1992

By Carlos E. Conde-Costas and Gilberto A. Rodriguez-Rodriguez

U.S. GEOLOGICAL SURVEY

Open-File Report 96-628

Prepared in cooperation with the

PUERTO RICO ENVIRONMENTAL QUALITY BOARD

PUERTO RICO AQUEDUCT AND SEWER AUTHORITY

PUERTO RICO DEPARTMENT OF NATURAL AND ENVIRONMENTAL RESOURCES

San Juan, Puerto Rico 1997

U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary

U.S. GEOLOGICAL SURVEY Gordon P. Eaton, Director

For additional information write to:

District Chief U.S. Geological Survey GSA Center, Suite 400-15 651 Federal Drive Guaynabo, Puerto Rico 00965

Copies of this report can be purchased from:

U.S. Geological Survey Branch of Information Services Box 25286 Denver, CO 80225-0286

CONTENTS

Abstract.............................................................................................................^ 1Introduction........................................................................................................................................... 1

Purpose and scope ......................................................................................................................... 4

Methods and procedures................................................................................................................ 4

Results................................................................................................................................................... 7

Selected references................................................................................................................................ 7

FIGURES

1. Generalized geologic map of the north coast limestone region of Puerto Rico........................... 2

2. Generalized hydrogeologic cross section of the Manati quadrangle, Puerto Rico....................... 3

3. Map showing location of sampling sites in the Manati quadrangle, Puerto Rico........................ 6

TABLES

1. Description of selected surface- and ground-water sampling sites in the Manatiquadrangle, Puerto Rico, and parameters selected for laboratory analyses .............................. 5

2. Major ions, nutrients, total organic carbon, and physical properties at selected surface- and ground-water sampling sites in the Manati quadrangle, Puerto Rico................................................................................................................................ 8

3. Concentrations of dissolved trace metals at selected ground-water samplingsites in the Manati quadrangle, Puerto Rico.............................................................................. 10

4. Organic compounds analyzed in water samples collected at selected samplingsites in the Manati quadrangle, Puerto Rico.............................................................................. 11

5. Pesticides and organic compounds detected in water from selected wells in theManati quadrangle, Puerto Rico................................................................................................ 14

6. Stable isotope analyses at selected ground-water sampling sites in the Manatiquadrangle, Puerto Rico ............................................................................................................ 15

Contents III

CONVERSION FACTORS, ABBREVIATED WATER-QUALITY UNITS, AND ACRONYMS

Multiply By To obtain

foot 0.3048 meter

mile 1.609 kilometer

square miles 2.59 square kilometer

Temperatures can be converted from degrees Celsius (°C) to degrees Fahrenheit (°F) by the formula:

°F=1.8x°C + 32

Abbreviated water-quality units used in report:

mg/L milligram per liter|ig/L micrograms per liter|iS/cm microsiemens per centimeter at 25 degrees Celsius

Acronyms used in report:

MRL Minimum reporting level USGS U.S. Geological Survey

IV Contents

Reconnaissance of Ground-Water Quality in the Manati Quadrangle, Puerto Rico, August-November 1992ByCarlos E. Conde-Costas anc/Gilberto A. Rodrfguez-Rodriguez

ABSTRACT

A synoptic water-quality survey was

conducted in the Manati quadrangle area of

Puerto Rico between August 25 and

November 12, 1992. Water samples were

collected at 31 sites, consisting of 29 wells,

one spring, and one creek. Water-quality

properties determined for these samples

included: field determinations for

temperature, specific conductance, pH, and

alkalinity, and laboratory analyses for

dissolved constituents (cations, anions, and

silica), nutrients (nitrite, nitrate plus nitrite,

ammonia, phosphorous, and ortho-

phosphorus), total organic carbon, trace

metals; organochlorine insecticides and

related compounds, organophosphorus

insecticides, volatile organic compounds,

semi volatile compounds (base, neutral Oand

acid methylene chloride extractable), and

selected stable isotopes (oxygen-18,

deuterium, nitrogen-15, and sulfur-34).

INTRODUCTION

The Manati quadrangle area lies within the north coast limestone region (Monroe, 1980), which includes about 700 square miles of northern Puerto Rico and extends eastward from Rincon in the western part of the island to Loiza, a distance of about 85 miles (fig. 1). Three hydrogeologic units are present in the Manati quadrangle: an upper aquifer contained in the Aymamon and Aguada Limestones of early Miocene age (fig. 2); a middle confining unit consisting of the upper member of the Cibao Formation of early Miocene age; and a lower aquifer in the Lares Limestone of Oligocene age (Rodriguez-Martmez, 1995).

The upper aquifer is the principal source of water supply in the study area. Ground water in the upper aquifer is mostly unconfined and exists as a lense of freshwater floating above a wedge of saline water and thinning toward the coast. The freshwater part of the aquifer is thickest within the Aguada Limestone where it could be as much as 300 feet thick. Within the Aymamon Limestone the thickness of the freshwater column ranges from less than 200 feet to zero at the coast. Ground-water withdrawals in the study area are

Introduction 1

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Introduction

mostly limited to areas north of latitude 18°25'00" N, where the Aymamon Limestone and Aguada Limestone become saturated and constitute the upper aquifer. South of this latitude only a few shallow wells exist and these are probably screened in the Quebrada Arenas Limestone member of the Cibao Formation.

The Manati area has been subjected to extensive agricultural, industrial, and urban development. In order to provide baseline data related to water-quality conditions in the area, the U.S. Geological Survey, in cooperation with the Puerto Rico Environmental Quality Board, the Puerto Rico Aqueduct and Sewer Authority, the Puerto Rico Department of Natural and Environmental Resources and other agencies of the Commonwealth of Puerto Rico, conducted a synoptic ground-water quality survey from August 25 to November 12, 1992.

Purpose and Scope

The purpose of the synoptic water-quality survey was to obtain data on the quality of ground water within the Manati quadrangle, Puerto Rico. The water-quality survey covers primarily an area of approximately 20 square miles of the upper aquifer (area north of latitude 18°25' N). However, the study area includes areas where wells tap the Quebrada Arenas Limestone, the Lares Limestone or the alluvial valley at inland parts of the quadrangle. The results from this survey are expected to be of use to water resources managers and planners, and to hydrologists for future reference and studies.

Water samples collected at 31 sites (29 wells, one spring, and one creek) were analyzed for temperature, specific conductance, pH, alkalinity (as calcium carbonate,

dissolved constituents (cations, anions, and silica), nutrients (nitrite, nitrate plus nitrite, ammonia, phosphorous and ortho-phosphorus), total organic carbon, trace metals, organochlorine insecticides and related compounds, organophosphorus insecticides, volatile organic chemicals, semivolatile compounds (base, neutral and acid methylene chloride extractable) and selected stable isotopes (oxygen-18, deuterium, nitrogen-15 and sulfur-34). Sampling sites, well characteristics and water-quality properties and constituents analyzed in the laboratory are listed in table 1.

Methods and Procedures

Water samples were collected at 31 sites, including 19 active public-water supply wells, six intermittently pumping wells (one industrial, three agricultural, and two livestock use wells), four unused wells (one flowing artesian well and three wells equipped with turbine pumps), one spring, and one small losing stream that recharges the aquifer south of latitude 18°25'00" N (fig. 3). Water samples collected from wells were obtained at or near the well-head and prior to chlorination. Intermittently pumped wells and unused wells were sampled within a period which did not exceed 30 minutes after the pump was turned-on. Pumping time constraints imposed either by the well owner or by on-site discharge facilities limited the sampling period.

Detailed information on the procedures and methods used for on-site measurements, collecting, treating, shipping samples, and laboratory analyses are given in the following U.S. Geological Survey publications "Techniques of Water-Resources Investigations of the U.S. Geological Survey" Book 1, Chap. D2 and; Book 5, Chap. Al and A3. Field measurements for

Reconnaissance of Ground-Water Quality in the Manati Quadrangle, Puerto Rico, August-November 1992

Table 1. Description of selected surface- and ground-water sampling sites in the Manatf quadrangle, Puerto Rico, and parameters selected for laboratory analyses[ , no data available; U, unused; UA, unused artesian; PS, public supply; SW, surface water; DO. domestic; AG, agricultural; LV, livestock; IN, industrial; SP, spring; A/C, anions and cations; NUT, nutrients; TM, trace metals; PST, organochlorine and organophosphorus insecticides; VOC, volatile organic compounds; SVOC, semi-volatile organic compounds: ISO. stable isotopes: Y, sample was collected; N. no sample was collected]

Map number

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Latitude/ longitude

182630662740

182613663414

182328662529

182751662937

182320662552

182540662754

182552662647

182554662749

182546662712

182542662736

182546662730

182617662902

182705662952

182701662902

182530662854

182646662359

182638662722

182412662949

182514662901

182735662343

182657662506

182604662925

182553662429

182545662438

182615662735

182305662659

182714662924

182316662737

182312662749

182651662416

182644662405

Municipality

Manatf

Vega Baja

Vega Baja

Manati

Vega Baja

Manati

Manati

Manati

Manati

Manati

Manati

Manati

Manati

Manati

Manati

Vega Baja

Manati

Manati

Manati

Vega Baja

Vega Baja

Manati

Vega Baja

Vega Baja

Manati

Manati

Manati

Manaii

Manati

Vega Baja

Vega Baja

Well name or site name

Atenas

Alturas

Beauchamp

Boquillas

Catala

CotoSur#l

CotoSur#2

CotoSur#3

Goto Sur #5

Goto Sur #6

Goto Sur WH

Cordova Davila

Cruz Rosa Rivas

Jacinto Cubano

Escalfullery

Vega Baja #4

Marista

Monserrate Sur

Monaco

NC-9

Ojo de Agua

Manati 3

Pugnado #1

Pugnado #2

Procter & Gamble

Quebrada

Rabanos

Rio Arriba #2

Rio Arriba #3

Vega Baja #2

Vega Baja #3

Type

PS

PS

AG

PS

LV

PS

U

u

PS

PS

AG

PS

PS

LV

PS

PS

U

LV

PS

UA

SP

PS

PS

PS

IN

SW

PS

PS

PS

PS

PS

Depth of well (feet)

240

--

--

132

150

300

390

215

500

475

--

200

--

--

400

-

--

180

500

1,540

--

200

150

340

240

--

160

300

220

120

140

Depth to

water (feet)

150

220

35

41

-

233

260

240

267

244

258

92

118

--

225

76

--

29

250

10

--

63

-

242

174

--

112

38

55

76

-

Samples collected for analyses

A/C

Y

Y

Y

Y

Y

Y

N

N

Y

Y

Y

Y

Y

Y

N

Y

N

Y

N

Y

N

Y

Y

Y

Y

N

Y

Y

Y

Y

Y

NUT

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

N

Y

Y

N

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

TM

Y

Y

Y

Y

Y

Y

N

N

Y

Y

Y

Y

Y

Y

N

Y

N

Y

N

Y

N

Y

Y

Y

Y

N

Y

Y

Y

Y

Y

PST

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

N

Y

Y

Y

Y

N

Y

Y

Y

Y

Y

Y

N

Y

Y

Y

Y

VOC

Y

Y

Y

Y

Y

N

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

N

Y

Y

N

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

SVOC

Y

Y

Y

Y

N

N

N

N

Y

Y

Y

Y

Y

Y

N

N

Y

Y

N

Y

Y

N

Y

Y

Y

Y

Y

N

N

Y

Y

ISO

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

N

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Y

Introduction

66'30' 66°22'30"18°30'

18°22'30"

Ha Puerto Nuevo

Atlantic Ocean

Base from the U.S. Geological Survey Puerto Rico e Isla LJmitrofes 1951

5 KILOMETERS

5 MILES

EXPLANATION

O WELL USED FOR PUBLIC SUPPLY

© WELL USED FOR AGRICULTURAL SUPPLY

® WELL USED FOR INDUSTRIAL SUPPLY

(p UNUSED WELL

A SURFACE WATER

SPRING

Figure 3. Location of sampling sites in the Manati quadrangle, Puerto Rico.

6 Reconnaissance of Ground-Water Quality in the Manati Quadrangle, Puerto Rico, August-November 1992

temperature, specific conductance, and pH were

determined during pumping at the nearest

discharge tap from the well head. Samples for

the analyses of alkalinity, the common

constituents, nutrients, trace metals, and stable

isotopes were withdrawn from a churn splitter (a

container commonly used to obtain representative

sub-samples) filled at the point of sampling.

Samples for the analyses of insecticides, organic

compounds (volatile and semivolatile) and total

organic carbon were collected directly into

sample containers at the well-discharge points.

Sample treatment and preservation was conducted

on-site following standard USGS procedures.

The samples were shipped to and analyzed at the

U.S. Geological Survey Central Laboratory in

Arvada, Colorado. Analytical results indicated

as "dissolved" or "filtered sample" correspond to

samples filtered through a 0.45 micron filter.

RESULTS

Analytical results of the field and laboratory measurements of selected physical properties, major ions, nutrients, and total organic carbon are summarized in table 2. Analytical results for laboratory measurements of trace metals are summarized in table 3. Pesticides and organic compounds analyzed at selected wells are summarized in table 4, and analytical results are presented in table 5. Stable isotope analytical results are summarized in table 6.

Results

Table 2. Major ions, nutrients, total organic carbon, and physical properties at selected surface- and ground-water sampling sites in the Manatf quadrangle, Puerto Rico[SC, specific conductance; |aS/cm, microsiemens per centimeter; pH, whole water field determinations; Temp, water temperature; °C, degrees Celsius; mg/L; milligrams per liter; Ca, calcium; Mg, magnesium; Na, sodium; K, potassium; HCO3 , bicarbonate, field end-point titration whole water sample; , no data available; (a), artesian; (b), spring; (c) surface-water sample; all analytical results are for filtered water samples except

alkalinity and TOC]

Map number

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31


Atenas

Alturas

Beauchamp

Boquillas

Catala

CotoSur#l

Goto Sur #2

CotoSur#3

Goto Sur #5

Goto Sur #6

Goto Sur WH

Cordova Davila

Cruz Rosa Rivas

Jacinto Cubano

Escalfullery

VegaBaja#4

Marista

Monserrate Sur

M6naco

NC-9 (a)

Ojo de Agua (b)

Manati #3

Pugnado #1

Pugnado #2

Procter & Gamble

Quebrada (c)

Rabanos

Rio Arriba #2

Rio Arriba #3

VegaBaja#2

Vega Baja #3

Date

09/25/92

09/16/92

09/29/92

09/17/92

10/02/92

11/05/92

11/12/92

11/12/92

09/14/92

09/15/92

09/18/92

09/25/92

09/21/92

09/30/92

10/06/92

09/14/92

10/08/92

11/06/92

10/06/92

09/18/92

11/05/92

09/24/92

09/10/92

08/25/92

09/24/92

11/06/92

09/18/92

10/01/92

10/01/92

09/15/92

09/15/92

Time

1200

1200

1400

1045

1500

1300

1300

1145

1100

1030

1500

1000

1230

1415

1500

1300

1330

1200

1500

0915

1530

1230

1100

1100

1030

1330

0900

1500

1200

0830

1130

SC (uS/cm)

1,020

900

625

900

700

550

490

569

975

2,500

600

810

870

980

600

810

575

450

650

4,050

1,000

860

1,620

760

820

650

990

800

750

1,260

700

PH (units)

7.0

7.1

6.5

7.2

6.8

6.5

6.6

6.9

7.1

7.0

6.6

6.9

6.9

7.0

6.6

7.1

6.8

7.2

7.0

7.3

6.5

7.0

7.2

6.5

7.5

7.4

7.1

6.5

6.5

7.1

6.7

Temp (°C)

26.0

25.5

25.5

26.5

27.0

25.0

26.0

25.5

26.0

25.0

25.0

25.5

26.5

26.0

25.0

26.0

26.0

27.0

25.0

27.0

25.5

27.0

26.0

25.0

25.5

25.0

26.0

25.5

25.5

25.5

25.5

Hard ness

(mg/L)

290

320

290

310

330

260

-

-

310

480

290

310

320

350

310

-

200

-

600

300

400

280

280

-

330

370

350

370

280

Ca (mg/L)

95

110

100

94

120

99

--

--

93

120

110

96

98

120

-

110

-

65

--

83

-

96

130

100

88

100

140

130

120

100

Mg (mg/L)

12

9.8

9.7

18

7.0

4.1

--

19

44

3.5

16

17

12

--

8.8

--

8.5

--

94

-

15

19

7.9

14

--

19

4.3

5.0

17

8.4

Na (mg/L)

98

59

13

55

13

11

-

-

61

270

10

48

53

47

~

43

-

13

--

670

-

42

140

35

40

-

74

16

16

100

39

K (mg/L)

2.7

3.5

2.3

2.7

1.5

-

--

--

1.1

4.8

0.7

2.4

2.2

3.6

-

2.2

-

1.5

--

33

1.9

3.4

1.3

2.3

-

2.5

1.3

1.7

2.9

1.7

HCO3(mg/L)

270

290

390

280

410

280

260

290

270

280

260

330

300

310

-

330

260

-

310

-

330

280

280

270

370

300

430

410

320

290

8 Reconnaissance of Ground-Water Quality in the Manatf Quadrangle, Puerto Rico, August-November 1992

Table 2. Major ions, nutrients, total organic carbon, and physical properties at selected surface and ground-water sampling sites in the Manatf quadrangle, Puerto Rico-Continued[Alk, alkalinity; mg/L; milligrams per liter; CaCO3 ; calcium carbonate; Cl, chloride; F, fluoride; Br, bromide; SiO2 , silica; DS, dissolved solids sum of

constituents; NO2 , nitrite as N; NO2+NO3 , nitrite plus nitrate as N; NH4 , ammonia as N; P, phosphorus; o-P, orthophosphate; TOC, total organic carbon; , no data

available; <, less than; (a), artesian; (b), spring; (c) surface water sample; all analytical results are for filtered water samples except alkalinity and TOC]

Map number

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31


Atenas

Alturas

Beauchamp

Boquillas

Catala

Goto Sur #1

Goto Sur #2

Goto Sur #3

Goto Sur #5

Goto Sur #6

Goto Sur WH

Cordova Davila

Cruz Rosa Rivas

Jacinto Cubano

Escalfullery

Vega Baja #4

Marista

Monserrate Sur

Monaco

NC-9 (a)

Ojo de Agua (b)

Manati #3

Pugnado#l

Pugnado #2

Procter & Gamble

Quebrada (c)

Rabanos

Rio Arriba #2

Rio Arriba #3

Vega Baja #2

Vega Baja #3

Alk (mg/L

(as CaC03))

220

240

320

230

340

230

210

240

220

230

210

270

250

260

--

270

--

210

-

260

--

270

230

230

220

300

250

350

340

260

240

SO4 (mg/L)

29

26

8.4

22

23

3

--

--

15

-

8.6

15

24

22

--

22

11

--

180

--

22

43

10

11

--

27

37

32

35

20

Cl (mg/L)

180

120

21

120

25

17

--

--

160

--

16

83

120

110

-

94

--

13

--

1,200

--

84

330

92

80

--

160

36

33

240

82

F Br (mg/L) (mg/L)

<.10 0.63

<.10 .40

.20 .08

<.10 .44

.10 .11

<.10

--

--

<.10 .36

-

<.10 .07

<10 .32

<.10 .46

<.10 .37

-

<.10 .35

-

.20 .07

--

.40

--

<.10 .30

<.10 .14

<.10 .29

.10 .28

--

<.10 .59

.10 .15

.10 .14

<.10 .74

<.10 .30

SiO2 (mg/L)

7.8

7.0

14

19

11

6.9

--

--

6.7

--

6.7

8.3

20

11

--

8.4

--

18

-

13

--

17

6.9

6.7

6.5

--

17

11

10

8.2

6.5

DS(mg/L)

563

481

360

472

403

--

--

--

488

--

301

437

484

488

--

450

258

--

2,420

--

445

814

398

383

--

551

458

431

681

400

NO2 (mg/L)

<.010

<.010

<.010

<.010

<.010

<.010

<.010

<.010

--

-

<.010

<.010

<.010

<.010

<.010

--

<.010

--

<.010

<.010

--

<.010

<.010

<.010

<.010

.010

<.010

<.010

<.010

--

--

NO2+NO3 (mg/L)

6.5

3.8

.40

3.8

1.2

12

14

7.5

--

--

18

6.1

2.7

11

5.7

--

6.9

--

6.2

0.08

--

5.2

4.0

7.0

9.2

.4

3.6

1.5

2.3

--

--

NH4 (mg/L)

0.020

.020

.020

.020

.010

.020

.010

.020

-

--

.010

.030

.070

.030

.400

--

.020

-

<.010

.10

--

.050

.030

.030

.050

.160

<.010

.010

<.010

--

-

P(mg/L)

0.020

.010

.020

.030

.020

.010

<.010

<.010

--

-

.010

.020

.040

.020

.020

--

.020

--

<.010

<.010

-

.020

<.010

<.010

.010

.030

.030

<.010

<.010

--

--

o-P (mg/L)

0.020

.010

<.010

.020

<.010

<.010

<.010

<.010

--

--

.010

.020

.030

.010

.010

--

.010

--

<.010

<.010

--

.020

<.010

<.010

<.010

.020

.030

<.010

<.010

--

--

TOC(mg/L)

0.7

.5

.3

.7

.8

.5

--

-

.2

.3

.6

.5

.3

.4

-

.4

.3

--

.9

.5

--

.4

.4

2.6

.3

8.7

.5

.7

1.2

.4

.5

Results

Tabl

e 3.

Con

cent

ratio

ns o

f dis

solv

ed tr

ace

met

als

at s

elec

ted

grou

nd-w

ater

sam

plin

g si

tes

in th

e M

anat

f qua

dran

gle,

Pue

rto R

ico

[All

conc

entr

atio

ns a

re in

mic

rogr

ams

per

liter

.. B

a, b

ariu

m; B

e, b

eryl

lium

; C

d, c

adm

ium

; C

r, ch

rom

ium

; C

o, c

obal

t; C

u, c

oppe

r; F

e, ir

on;

Pb, l

ead;

Li,

lithi

um;

Mn,

man

gane

se;

Mo,

mol

ybde

num

;

3J

(P 8 3 a> en" CO Q>

8 2. o 5 a 1 » 0 c 9L ? 5" » o> 3 0> 51,

0 c 1 3 ca_ TJ c (P o 3) o' o "^ c CQ I Z o i (P _L <D <D ro

Ni,

nick

el; /

Map

nu

mbe

r

1 2 3 4 5 6 9 10 11 12 13 14 16 18 20 22 23 24 25 27 28 29 30 31

^g, s

ilver

; Sr

, stro

ntiu

i

Wel

l nam

e or

si

te n

ame

Ate

nas

Altu

ras

Bea

ucha

mp

Boq

uilla

s

Cat

ala

Got

o Su

r #1

Got

o Su

r #5

Got

o Su

r #6

Got

o Su

r W

H

Cor

dova

Dav

ila

Cru

z R

osa

Riv

as

Jaci

nto

Cub

ano

Veg

a B

aja

#4

Mon

serr

ate

Sur

NC

-9 (

a)

Man

atf #

3

Pugn

ado#

l

Pugn

ado

#2

Proc

ter

& G

ambl

e

Rab

anos

Rfo

Arr

iba

#2

Rio

Arr

iba

#3

Veg

a B

aja

#2

Veg

a B

aja

#3

cn; V

, van

;

Ba 15 19 33 22 38 11 24 48 9 16 24 19 38 30 43 29 19 10 11 21 37 36 28 15

idiu

m; Z

n, z

inc;

< le

ss th

an;

(

Be

Cd

Cr

<.5

<1

<5

<.5

<1

<5

<.5

<1

6

<.5

<1

5

<.5

<1

<5

<.5

1 <5

<.5

<1

<5

<.5

<1

<5

<.5

<1

<5

<.5

<1

6

<.5

<1

<5

<.5

<1

<5

<.5

<1

<5

<.5

<1

<5

<2

<3

<20

<.5

<1

<5

<.5

<1

<5

<.5

<1

<5

<.5

<1

<5

<.5

<1

<5

.5

1 5

<.5

<1

<5

<.5

<1

<5

<2

<3

<5

a) a

rtesi

an]

Co

Cu

<3

<10

<3

<10

<3

<10

<3

<10

<3

<10

<3

<10

<3

<10

<3

<10

<3

<10

<3

<10

<3

<10

<3

10

<3

<10

<3

<10

<9

<30

<3

<10

<3

<10

<3

<10

<3

<10

<3

<10

3 40

<3

<10

<3

<10

<3

<10

Fe

Pb

5 <1

0

<3

<10

31

10

<3

<10

7 <1

0

<3

<10

6 <1

0

17

<10

6 <1

0

5 <1

0

6 10

6 <1

0

<3

<10

7 <1

0

1 ,20

0 <3

0

6 <1

0

13

10

6 <1

0

6 <1

0

6 <1

0

4 10

<3

<10

<3

<10

<3

<10

Li <4 <4 4 <4 6 <4 4 4 4 <4 <4 5 <4 7 15 <4 7 6 <4 <4 6 5 4 <4

Mn

Mo

4 <1

0

2 <

jo

4 10

2 <1

0

2 <1

0

1 <1

0

2 <1

0

4 <1

0

3 <1

0

3 <1

0

2 <1

0

8 <1

0

<1

<10

21

<10

34

<30

5 <1

0

2 <1

0

4 <1

0

5 <1

0

1 <1

0

2 10

1 <1

0

<1

<10

<1

<10

Ni

Ag

Sr

<10

<1

99

<10

<1

160

<10

<1

900

<10

<1

510

<10

<1

550

<10

<1

55

<10

<1

170

<10

<1

300

<10

<1

45

<10

<1

150

<10

<1

610

<10

<1

110

<10

<1

180

<10

<1

730

<30

<3

3,90

0

<10

<1

260

<10

<1

190

<10

<1

72

<10

<1

98

<10

<1

360

10

1 37

0

<10

<1

410

<10

<1

230

<10

<1

120

V <6 <6 8 <6 7 <6 <6 <6 6

<6

6 <6 <6 <6 <18 <6 <6 <6 <6 <6 6 <6 <6 <6

Zn 19 6 19 10 8 7 6 14 11 3 6 30 5 15 15 5 10 10 7 4 13 6 <3 4

Table 4. Organic compounds analyzed in water samples collected at selected sampling sites in the Manati quadrangle, Puerto Rico[All concentrations are in micrograms per liter, except where indicated and as total constituents. MRL, minimum reporting level.]

1. Organochlorine pesticides and related compounds

Compound

Aldrin

Chlordane

Chlorpyrifor

ODD

DDE

DOT

DBF

Di-Systone

Dieldrin

Endosulfan

Endrin

MRL

0.01

.01

.01

.01

.01

.01

.01

.01

.01

.01

.01

Compound

Fonofos

Gross PCB's

Gross PCN's

Heptachlor

Heptachlor Epoxide

Lindane

Methoxychlor

Mirex

Perthane

Phorate

Toxaphene

MRL

0.01

.01

.10

.01

.01

.01

.01

.01

.10

.01

1.00

II. Organophosphorus pesticides

Compound

Diazinon

Ethion

Melathion

MRL

.01

.01

.01

Compound

Methyl Parathion

Parathion

Trithion

MRL

.01

.01

.01

III. Volatile organic chemicals (VOCs)

Compound

1,1,1 ,2-Tetrachloroethane

1,1,1 ,-Trichloroethane

1 , 1 ,2,2-Tetrachloroethane

1 , 1 ,2-Trichloroethane

1,1-Dichloroethane

1 , 1 -Dichloroethylene

1 , 1-Dichloropropene

1 ,2,3-Trichlorobenzene

1 ,2,3-Trichloropropane


1 ,2,4-Trimethylbenzene

MRL

3

3

3

3

3

3

3

3

3

3

3

Compound

1 ,2-Dichlorobenzene

1 ,2-Dichloroethane

1 ,2-Dichloropropane

1 ,2-Transdichloroethene

1 ,3,5-Trimethylbenzene


1,3-Dichloropropane

1 ,4-Chlorotoluene


2,2-Dichloropropane

2-Chloroethylvinylether

MRL

3

3

3

3

3

3

3

3

3

3

3

Results 11

Table 4. Organic compounds analyzed in water samples collected at selected sampling sites in the Manatf quadrangle, Puerto Rico-Continued

III. Volatile organic chemicals (VOCs)--Continued

Compound

1,2-Chlorotoluene

1 ,2-Dibromoethane

Benzene

Bromobenzene

Bromochloromethane

Bromoform

Carbontetrachloride

Chlorobenzene

Chlorodibromomethane

Chloroethane

Chloroform

Cis- 1 ,2-dichloroethene

Cis- 1 ,3-dichloropropene

Dibromochloropropane

Dibromomethane

Dichlorobromomethane

Dichlorodifluoromethane

Ethylbenzene

Hexachlorobutadiene

Isopropylbenzene

Methylbromide

MRL

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

Compound

Acrolein

Acrylonitrile

Methylchloride

Methylene chloride

Methyltertbutylether

N-Butylbenzene

N-propylbenzene

Naphthalene

P-isopropyltoluene

Sec-butylbenzene

Styrene

Tert-butylbenzene

Tetrachloroethylene

Toluene

Trans- 1 ,3-dichloropropene

Trichloroethylene

Trichlorofluoromethane

Trichlorotrifluoroethane

Vinyl chloride

Xylenes,total ortho, meta,

and para

MRL

20

20

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

1

3

IV. Semivolatile organic chemicals

Compound


1 ,2,5,6-Dibenzanthracene


1 ,2-Diphenylhydrazine



MRL

5

10

5

5

5

5

Compound

2-Chlorophenol

2-Nitrophenol

3 , 3 -Dichlorobenzidine

2-Methyl-4,6-dinitrophenol

4-Bromophenylphenylether

4-Chlorophenylphenylether

MRL

5

5

20

30

5

5

12 Reconnaissance of Ground-Water Quality in the Manatf Quadrangle, Puerto Rico, August-November 1992

Table 4. Organic compounds analyzed in water samples collected at selected sampling sites in the Manatf quadrangle, Puerto Rico-Continued

Compound

IV. Semivolatile organic chemicals-Continued

MRL Compound MRL

2,4,6-Trichlorophenol 20

2,4-Dichlorophenol 5

2,4-Dimethylphenol 5

2,4-Dinitrophenol 20

2,4-Dinitrotoluene 5

2,6-Dinitrotoluene 5

2-Chloronaphthalene 5

Benzo (k) fluoranthene 10

Benzo (a) anthracene 10

Benzo (g,h,i) perylene 10

Bis (2-chloroethoxy) methane 5

Bis (2-chloroethyl) ether 5

Bis (2-chloroisopropyl) ether 5

Bis (2-ethylhexyl) phthalate 5

Butyl benzyl phthalate 5

4-Chloro-3-methylphenol 30

Chrysene 10

Di-n-butyl phthalate 5

Di-n-octyl phthalate 10

Diethyl phthalate 5

Dimethyl phthalate 5

Fluoranthene 5

4-Nitrophenol 30

Acenaphthene 5

Acenaphthylene 5

Anthracene 5

Benzidine 40

Benzo (a) pyrene 10

Benzo (b) fluoranthene 10

Fluorene 5

Hexachlorobenzene 5

Hexachlorobutadeine 5

Hexachlorocyclopentadeine 5

Hexachloroethane 5

Indeno (1,2,3-cd) pyene 10

Isophorone 5

N-Nitrosodi-n-propylamine 5

N-Nitrosodiphenylamine 5

Naphthalene 5

Nitrobenzene 5

Pentachlorophenol 30

Phenantherene 5

Phenol 5

Pyrene 5

Results 13

Table 5. Pesticides and organic compounds detected in water from selected wells in the Manati quadrangle, Puerto Rico[All concentration are in micrograms per liter]

Well number Compound Concentration

1 Dieldrin 0.20

DDD 0.01

2 Dieldrin 0.01

Heptachlor epoxide 0.01

4 Dieldrin 0.01


6 Lindane 0.01

Toxaphene 1.00


7 Dieldrin 0.12

8 Dieldrin 0.07

1,2,3,-Trichloropropane 3.20

9 Dieldrin 0.06

10 Dieldrin 0.04

11 Dieldrin 0.24

Toxaphene 6.00

12 Dieldrin 0.01


13 Dieldrin 0.01


17 Dieldrin 0.01

18 Diazinon 0.01

19 Dieldrin 0.01

* 23 Dieldrin 0.06

24 Diazinon 0.01

25 Dieldrin 0.12

Toxaphene 1.00


Table 6. Stable isotope analyses at selected ground-water sampling sites in the Manatf quadrangle, Puerto Rico[O-18, oxygen-18; H-2 deuterium; N-15, nitrogen-15; S-34, sulfur-34; O-18 and H-2 in parts per mil relative to Vienna Standard Mean Ocean Water (VSMOW); N-15 in parts per mil relative to air; S-34 in sulfate, aqueous in parts per mil relative to Canyon Diablo Troilite (CDT); (a), artesian; (b), spring; (c), surface-water sample]

Map number

1

2

3

4

5

6

7

8

9

10

11

12

13

14

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31


Atenas

Alturas

Beauchamp

Boquillas

Catala

Goto Sur #1

Goto Sur #2

Goto Sur #3

Goto Sur #5

Goto Sur #6

Goto Sur WH

Cordova Davila

Cruz Rosa Rivas

Jacinto Cubano

Vega Baja #4

Marista

Monserrate Sur

Monaco

NC-9 (a)

Ojo de Agua (b)

Manatf #3

Pugnado #1

Pugnado #2

Procter & Gamble

Quebrada (c)

Rabanos

Rio Arriba #2

Rio Arriba #3

Vega Baja #2

Vega Baja #3

O-18

-2.60

-2.60

-2.50

-2.60

-2.45

-2.55

-2.58

-2.88

-2.65

-2.50

-2.45

-2.45

-2.65

-2.55

-2.50

-

-2.70

-2.55

-1.50

-2.40

-2.60

-2.55

-

-2.50

-2.40

-2.65

-2.55

-2.50

-2.50

-2.55

H-2

-8.5

-9.5

-7.0

-8.5

-7.0

-8.0

-7.7

-11.1

-9.0

-7.0

-8.0

-7.5

-8.5

-9.5

-9.0

-

-9.5

-8.5

-1.0

-7.5

-8.0

-9.5

-

-7.5

-6.5

-8.0

-10.0

-7.5

-8.5

-8.0

N-15

4.5

8.2

7.0

11.6

10.0

3.8

3.4

3.8

3.4

3.1

2.5

8.1

11.9

10.9

8.9

5.4

9.5

6.0

-

8.8

12.7

-

-

3.8

7.2

12.0

14.3

13.4

7.2

7.6

S-34

20.0

13.1

-

13.7

2.4

-

-

16.3

15.4

19.2

11.5

17.4

13.5

16.6

11.3

19.1

3.9

7

19.6

13.4

16.1

17.6

14.1

18.5

21.9

17.2

2.5

-

16.5

11.9

Results 15

REFERENCES

Bennett, G.D., and Giusti, E.V., 1972, Ground water in the Tortuguero area, Puerto Rico: U.S. Geological Survey Bulletin 10, 25 p.

Brown, Eugene, Skougstad, M.W., and Fishman, M.J.,1970, Methods for the collection and analysis of water samples for dissolved minerals and gases: Techniques of Water- Resources Investigations of the U.S. Geological Survey, Book 5, Chapter Al, 160 p.

Goerlitz, D.F., and Brown; E., 1972, Methods for analysis of organic substances in water: Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 5, Chapter A3, 40 p.

Hem, J.D., 1989, Study and interpretation of the chemical characteristics of natural water (3d ed.): U. S. Geological Survey Water-Supply Paper 2254, 263 p.

Monroe, W.H., 1980, Geology of the Middle Tertiary Formations of Puerto Rico: U.S. Geological Survey Professional Paper 953, 90 p.

Rodriguez-Martinez, Jesus, 1995, Hydrogeology of the North Coast Limestone aquifer system of Puerto Rico: U.S. Geological Survey Water-Resources Investigations Report94-4249, 22 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: Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 5, Chapter Al, 626 p.

U.S. Environmental Protection Agency, 1996, Drinking water regulations and health advisories: U.S. Environmental Protection Agency, Office of Water, EPA 822-R-96-001, lip.

Wershaw, R.L., Fishman, M.J., and Grabbe, R.R., 1987, Methods for the determination of organic substances in water and fluvial sediments: Techniques of Water-Resources Investigations of the U.S. Geological Survey, Book 5, Chapter A3, 90 p.

Wood, WW, 1976, Guidelines for collection and field analyses of ground-water samples for selected unstable constituents: Techniques of Water-Resources Investigations of the U.S. 0 Geological Survey, Book 1, Chapter D2, 24 p.


Documents

Reconnaissance of Ground-Water Quality in the Manati ...NC-9 Ojo de Agua Manati 3 Pugnado #1 Pugnado #2 Procter & Gamble Quebrada Rabanos Rio Arriba #2 Rio Arriba #3 Vega Baja #2 Vega