Screening Quick Reference Tables 

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

This set of NOAA Screening Quick Reference Tables, or SQuiRTs, presents screening concentrations for inorganic and organic contaminants in various environmental media. Additional reference material, such as guidelines for sample preservation, are also included. NOAA identifies potential impacts to coastal resources and habitats likely to be affected by hazardous wastes. To screen for substances which may threaten natural resources of concern to NOAA, environmental concentrations are compared to these screening levels. These tables are intended for preliminary screening purposes only: they do not represent official NOAA policy and do not constitute criteria or clean-up levels. NOAA does not endorse their use for any other purposes. Screening levels are reported with the number of significant figures they were originally reported with. In this new version, column headings link to OR&R’s web site wherebrief descriptions of the benchmark may be found. However, detailed guidance on the recommended application of various screening guidelines is provided in the original sources (listed in each SQuiRT section, with web links for many). Users of the SQuiRT cards are strongly encouraged to review supporting documentation to determine appropriateness for their specific use. The SQuiRT card set has been re-organized from earlier versions to accommodate expansion. Benchmarks from numerous new sources have been incorporated, and the list of analytes vastly increased. The SQuiRT cards present benchmarks representing different degrees of protectiveness. Multiple benchmarks are also provided in many cases: the user is advised to review the derivation of any particular benchmark before selecting a specific value. Information is still presented in sections, with new sections appearing in this 

expanded version: 

• Inorganics in Sediment • Inorganics in Soil 

(freshwater and marine)

• Inorganics in Water • Organics in Sediment 

(groundwater and surface water)

• Organics in Water and Soil • PCB Composition

• Toxic Equivalency Factors • Composition by Carbon Range

• Guidelines for Sample Collection & Storage • Analytical Methods for Inorganics • Analytical Methods for Organics 

Footnotes within each SQuiRT section which are only to aid in deciphering the nature of spconstraints, notations which relate to the sourexplained at the end of the section. Organic calphabetically, without categorization. A few snumbers are also presented to aid in identifyiExcept as noted, all concentrations in the SQFor surface water samples, because releases often continuous and long-term, concentratiodirectly with chronic benchmarks, when availaare also screened against chronic benchmarkdilution factors should be applied to allow for discharge of groundwater to surface water. TEnvironmental Protection Agency (EPA) Maxapplicable to drinking water sources and secogroundwater, supplemented by values from CWorld Health Organization. Preference for surface water and groundwateAmbient Water Quality Criteria (AWQC). This 

Secondary Acute Values (SAVs) or available other regulatory agencies. Tier II SAVs are deAWQC, but do not have sufficient supporting 

Lowest Observable Effect Levels (LOELs) weAWQC. Around 2000, EPA stopped publishinare reproduced here when no other benchma

instances, they formed the basis for state staFor many trace elements, AWQC are now exfraction, which is essentially defined operatiothe toxicity of many trace elements is related values presented are for a default hardness o

provided in the SQuiRT cards to calculate the hardness, or, to convert from unfiltered, total fractions. 
Screening Quick Reference Table for Inorganics in S

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to e subject to changes as new

 # - Based on SLC approach using sensitive species HC5%; ES&T 2005 39(14):5148-5156. 

* - Based upon EQp approach using current AWQC CCC ^ - Based on SLC approach to derive LEL and SEL; Env’al Monitor & Ass’ment 2005 110:71-85 + - Carried over from Open Water disposal Guidelines; treated as if LEL for management decisions. 

Bioassay endpoints: M – Microtox; B – Bivalve; E – Echinoderm larvae; O – Oyster larvae; 

A – Amphipod; N – Neanthes; L –Larval bioassay; plus, I – Infaunal community impacts 

Sources 1 – Buchman, M. 1999. NOAA HAZMAT Report 99-1. 2 – EPA 905-R96-008 3 – Arch ET&C 2000, 39(1)20- TEL and PEL are also known a4 – Guidelines for the protection and management of aquatic s5 – ET&C 2002, 21(9)1993- 6 – Ecotox. 1996, 5(4):253- 7 – Chapter 173-204 WAC, 1991/95 as supplemented by WA D

ensure accuracy; however, NOAA is not liable for errors. Values ar data b

Analyte FRESHWATER SEDIMENT MAR

All concentrations in parts per 

billion dry weight unless 

specified otherwise

“Background” 1 ARCS H. azteca TEL 2 TEC 3 TEL 3 LEL 4 PEC 3 PEL 3 SEL 4 UET 1 T20 5 TEL 6 ERL 

Predicted Toxicity Gradient: Increasing 

Aluminum (%) Al 0.26% 2.55% Antimony Sb 160 3,000 M 630 Arsenic As 1,100 10,798 9,790 5,900 6,000 33,000 17,000 33,000 17,000 I 7,400 7,240 8,200 Barium Ba 700 130,100# Cadmium Cd 100-300 583 990 596 600 4,980 3,530 10,000 3,000 I 380 680 1,200 Chromium Cr 7,000-13,000 36,286 43,400 37,300 26,000 111,000 90,000 110,000 95,000 H 49,000 52,300 81,00Cobalt Co 10,000 50,000+ Copper Cu 10,000-25,000 28,012 31,600 35,700 16,000 149,000 197,000 110,000 86,000 I 32,000 18,700 34,00Iron (%) Fe 0.99-1.8 % 18.84% 2% 4% 4% I Lead Pb 4,000-17,000 37,000 35,800 35,000 31,000 128,000 91,300 250,000 127,000 H 30,000 30,240 46,70Manganese Mn 400,000 630,000 460,000 1,100,000 1,100,000 I Mercury Hg 4-51 180 174 200 1,060 486 2,000 560 M 140 130 150 Nickel Ni 9,900 19,514 22,700 18,000 16,000 48,600 36,000 75,000 43,000 H 15,000 15,900 20,90Selenium Se 290 Silver Ag <500 500 + 4,500 H 230 730 1,000 Strontium Sr 49,000 Tin Sn 5,000 48 * Vanadium V 50,000 Zinc Zn 7,000-38,000 98,000 121,000 123,000 120,000 459,000 315,000 820,000 520,000 M 94,000 124,000 150,00Lead 210 bq

/g dw 0.5 ^ < 9.7 ^ 

Polonium 210 bq

/g dw 0.6 ^ < 8.7 ^ 

Radium 226 bq

/g dw 0.1 ^ < 13 ^ 

Sulfides 130,000 M 

For more information, email SQuiRT@NOAA.gov Pg 

2 
Screening Quick Reference Table for Inorganics in S

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1: bd – below detection 2: S – serious contamination level; L – Environmental Risk Limit 

For more information, email SQuiRT@NOAA.gov Pg 

3 

BACKGROUND 1 DUTCH STANDARDS 2 Eco-SSL 3 ANALYTE 

All concentrations in parts per billion dry 

weight unless specified otherwise

CAS Number Mean Range Target Intervention Avian Inverts Mamm

Aluminum Al 7429905 4.70% 0.5- >10% Antimony Sb 7440360 480 bd-8,800 3,000 15,000 78,000 142 Arsenic As 7440382 5,200 bd-97,000 900 L 55,000 43,000 60,000 a 5,70Barium Ba 7440393 440,000 10,000-0.5% 160,000 625,000 330,000 1,04Beryllium Be 7440417 630 bd-15,000 1,100 30,000 S 40,000 1,06Boron B 7440428 26,000 bd-300,000 Bromine Br 7726956 560 bd-11,000 20,000 Cadmium Cd 7440439 800 12,000 770 20,000 a 2.2Chromium III Cr 7440473 < 37,000 1,000-0.2% < 380 L < 220,000 L 26,000 <400 a 34,0Chromium VI Cr 18540299 < 37,000 < 380 L < 220,000 L 400 a 81,0Cobalt Co 7440484 6,700 bd-70,000 2,400 L 180,000 L 120,000 140 Copper Cu 7440508 17,000 bd-700,000 3,400 L 96,000 L 28,000 50,000 a 5,40Cyanide (total complex) CN 57125 5,000 50,000 (pH>5) 1,33Cyanide (total free) CN 1,000 20,000 Fluorine F 7782414 210,000 bd-0.37% 500,000 Iodine I 7553562 750 bd-9,600 Iron Fe 7439896 1.80% 0.01- >10% Lanthanum La 7439910 30,000 bd-200,000 Lead Pb 7439921 16,000 bd-700,000 55,000 L 530,000 11,000 500,000 a 53.Lithium Li 7439932 20,000 bd-140,000 Manganese Mn 7439965 330,000 bd-0.7% 4,300,000 450,000 4,000Mercury Hg 7439976 58 bd-4,600 300 10,000 100 a v Mercury(methyl) 22967926 37 L 4,000 L < 100 a v 1.5Molybdenum Mo 7439987 590 bd-15,000 3,000 190,000 L Nickel Ni 7440020 13,000 bd-700,000 260 L 100,000 L 210,000 200,000 a 13,6Selenium Se 7782492 260 bd-4,300 700 L 100,000 S 1,2000 4,100 63Silver Ag 7440224 15,000 S 4,200 4,04Strontium Sr 7440246 120,000 bd-0.3% Sulfide 18496258 3.5Sulfur S 7704349 0.12% bd-4.8% Technetium Tc 7440268 
Screening Quick Reference Table for Inorganics in S

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1: bd – below detection 2: S – serious contamination level; L – Environmental Risk Limit 

For more information, email SQuiRT@NOAA.gov Pg 

4 

BACKGROUND 1 DUTCH STANDARDS 2 Eco-SSL 3 ANALYTE 

All concentrations in parts per billion dry 

weight unless specified otherwise

CAS Number Mean Range Target Intervention Avian Inverts Mamm

Tellurium Te 13494809 600,000 Thallium Tl 7440280 8,600 2,20-31,000 1,000 15,000 S 56.Tin Sn 7440315 890 bd-10,000 19,000 background 900,000 S 7,62Titanium Ti 7440326 0.224 % 0.007-2 % Tin as Triphenyltin 668348 < 2,500 Tungsten W 7440337 Uranium U 7440611 2,300 290-11,000 Vanadium V 7440622 58,000 bd-500,000 42,000 250,000 S 7,800 1,59Zinc Zn 7440666 48,000 bd-0.29% 16,000 L 350,000 L 46,000 6,620 v 

Sources 1 – USGS Prof. Paper 1270, 1984. Mean is geometric mean of national data. 

2 – Entry is lower of current VROM Environmental Quality standards or the updated RIVM Environmental Risk Limits. Risk limits are typically divided 

computation has not been done here. Dutch Target/Intervention: E.M.J. Verbruggen, R. Posthumus and A.P. van Wezel, 2001. Ecotoxicological Serious Risk Concentrations for soil, seproposal for first series of compounds. Nat. Inst. Public Health and the Env., and subsequent updates as published elsewhere. 

Min. Housing, Spatial Plan. And the Env., 2000. Annexes Circular on target values and intervention values for soil remediations. 

3 – Entry is lower of either: 

EPA Eco-SSLs, www.epa.gov/ecotox/ecossl/

a – ORNL Screening benchmark for earthworms and soil microorganisms: ORNL 1997a, ES/ER/TM-126/R2

v – EPA R5 Eco Screening levels soil - shrew or vole, www.epa.gov/reg5rcra/ca/

4 - ORNL 1997b, ES/ER/TM-85/R3. 
Screening Quick Reference Table for Inorganics in W

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1: * – Secondary standard 2: pH – criteria is pH dependent ; p - proposed; † - hardness dependent; * - EPA LOEL ; (1⁄2) - CMC is halved to compare to 1985 Guideline derivation 

For more information, email SQuiRT@NOAA.gov Pg 

5 

SURFACE WATERS 2

Freshwater 

ELEMENT All concentrations in parts per billion 

unless specified otherwise

GROUND WATER 1

Acute Chronic Acute 

Aluminum Al 50-200 * pH 750 pH 87 Antimony Sb 6 88 p 30 p 1,500 p Arsenic III As+3 <10 190 E Arsenic V As+5 < 10 66 T 3.1 T 2,319 * Arsenic, Total As 10 340 150 69 Barium Ba 2,000 110 T 3.9 E 1,000 BC Beryllium Be 4 35 T 0.66 T 1,500 BC Boron B 5,000 C 30 T 1.6 T Cadmium Cd 5 2.0 † 0.25 † 40 Chromium III Cr+3 < 100 570 † 74 † 10,300 * Chromium VI Cr+6 < 100 16 11 1,100 Chromium, Total Cr 100 Cobalt Co 1,500 T 3.0 E Copper Cu 1,300 13 † 9 † 4.8 Fluoride F 4,000 200 BC (hardness < 50) 1,500 BCGallium Ga 18 NZ Iron Fe 300 * 1,000 300 BC Lanthium La 0.04 NZLead Pb 15 65 † 2.5 † 210 Lithium Li 260 T 14 T Manganese Mn 50 * 2,300 T 80 E Mercury Hg 2 1.4 0.77 1.8 Methyl Mercury 0.099 T 0.0028 T Molybdenum Mo 70 W 16,000 T 34 NZ Nickel Ni 20 W 470 † 52 † 74 Phosphorus P Potassium K 373,000 BCSelenium Se 50 13-186 total 5 total 290 Silver Ag 100 * 1.6 (1⁄2) † 0.36 T 0.95 (1⁄2) Strontium Sr 15,000 T 1,500 T Thallium Tl 2 110 T 0.03 NZ 2,130 * Tin as TBT 0.46 0.072 0.42 
Screening Quick Reference Table for Inorganics in W

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1: * – Secondary standard 2: pH – criteria is pH dependent ; p - proposed; † - hardness dependent; * - EPA LOEL ; (1⁄2) - CMC is halved to compare to 1985 Guideline derivation 

For more information, email SQuiRT@NOAA.gov Pg 

6 

SURFACE WATERS 2

Freshwater 

ELEMENT All concentrations in parts per billion 

unless specified otherwise

GROUND WATER 1

Acute Chronic Acute 

Tin as Di-N-Butyl 0.08 BCTin as Triethyl 0.4 BCTin as Triphenyl 0.022 BC 34 BCTitanium Ti 2,000 BCUranium U 30 46 T 0.5 NZ 500 BC Vanadium V 280 T 19 E Zinc (Zn) Zn 5,000 * 120 † 120 † 90 Zirconium Zr 310 T 17 T Hydrogen Sulfide 2 2 Cyanide, free CN 200 22 5.2 1 

Freshwater criterion for certain elements (†) are expressed as a function of hardness (mg/L) in the water column. The values shown assume 100 mg/L. Values for a difthe following equations to arrive at a CMC or CCC for filtered samples. Hardness may range up to 400 mg/L as calcium carbonate. For hardness above this range, use 

For salinity between 1 and 10 ppt, use the more stringent of either fresh or marine values. 

Sources 1 – Primary entry is the US EPA MCL value, followed by the WHO drinking water guidelines. 

Maximum Contaminant Levels (MCLs): http://www.epa.gov/safewater/index.html

W – World Health Organization’s (WHO) Drinking water guidelines: http://www.who.int/water_sanitation_health/dwq/en/

C – Canadian water Quality Guidelines: http://www.ec.gc.ca/CEQG-RCQE/English/Ceqg/Water/default.cfm

2 – Primary entry is the US Ambient Water Quality Criteria, followed by the lowest of Tier II SAVs or available standards and guidelines. 

EPA Ambient water Quality Criteria (AWQC): http://www.epa.gov/waterscience/criteria/aqlife.html

T – Tier II Secondary Acute Value: http://www.esd.ornl.gov/programs/ecorisk/tools.html

BC – British Columbia Water Quality Guidelines (either working or recommended): http://www.env.gov.bc.ca/wat/wq/

NZ – Australian & New Zealand ECLs and Trigger values: ANZECC Oct 2000, Volume 1, The Guidelines. www.mfe.govt.nz/publications/

E – EcoUpdate: www.epa.gov/oswer/riskassessment/ecoup/

Lowest Observable Effect Levels (LOELs) previously published by EPA are also included since these essentially were the basis for many state sta

EPA LOELs: EPA Water quality Criteria Summary, Office of Science & Technology, Health & Ecological Criteria Div., Ecological Risk Assessment 

Full listings appeared in various Fed. Register notices and in EPA’s Quality Criteria for Water, 1992. 
Screening Quick Reference Table for Inorganics in W

These tables were developed for internal use for screening purposes only: they do not represent official NOAA policy and do not const

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

For more information, email SQuiRT@NOAA.gov Pg 

7 

HARDNESS CALCULATIONS – UNFILTERED FRESHWATER CRITERIA UNFILTERED TO FILTERED CA

ELEMENT 

CMC CCC Fresh water CMC Freshwa

Arsenic (As) 1 1 Cadmium (Cd) CMC = e 1.0166 [ ln(hardness)] - 3.924 CCC = e 0.7409 [ ln(hardness)] – 4.719 CF = 1.136672 - 0.041838 [ln(hardness)] CF = 1.101672 - 0.04Chromium III (Cr+3) CMC = e 0.819 [ ln(hardness)] + 3.7256 CCC = e 0.819 [ ln(hardness)] + 0.6848 CF = 0.316 CF = 0Chromium VI (Cr +6) CF = 0.982 CF = 0Copper (Cu) CMC = e 0.9422 [ ln(hardness)] - 1.7 CCC = e 0.8545 [ ln(hardness)] - 1.702 CF = 0.960 CF = 0Lead (Pb) CMC = e 1.273 [ ln(hardness)] - 1.46 CCC = e 1.273 [ ln(hardness)] - 4.705 CF = 1.46203 - 0.145712 [ ln(hardness)] SAME AS Mercury (Hg) CF = 0.85 CF = Nickel (Ni) CMC = e 0.846 [ ln(hardness)] + 2.255 CCC = e 0.846 [ ln(hardness)] + 0.0584 CF = 0.998 CF = 0Selenium (Se) – – Silver (Ag) CMC = e 1.72 [ ln(hardness)] - 6.52 CCC — No criteria CF = 0.85 – Zinc (Zn) CMC = e 0.8473 [ln(hardness)] + 0.884 CCC = e 0.8473 [ ln(hardness) +0.884 CF = 0.978 CF = 0

Freshwater criterion for certain elements are expressed as a function of hardness (mg/L) in the water column. The values shown assume 100 mg/L. 

be calculated using the above equations to arrive at a CMC or CCC for filtered samples. Hardness may range up to 400 mg/L as calcium carbonate. 400 mg/L as the maximum value allowed. Criteria for most metals are expressed as standards for samples filtered through 0.45 m filter (i.e., "dissolved"). To convert unfiltered concentrations tconcentration value by the appropriate Conversion Factor (CF) above. For cadmium and lead, the conversion factor itself is hardness-dependent. 

CMC: Criteria Maximum Concentration is the highest level for a 1-hour average exposure not to be exceeded more than once every three years, and CCC: for a 4-day average exposure not to be exceeded more than once every three years, and is synonymous with “chronic.” 

Sources EPA Ambient water Quality Criteria (AWQC): http://www.epa.gov/waterscience/criteria/aqlife.html
Screening Quick Reference Tables for Organics – Se

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or 

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data 

4: Entry is lowest, reliable value among AET tests, on 1% TOC basis: I - Infaunal community impact ; M - Microtox bioassay ; H - Hyalella azteca bioassay ; † - value on dry weight basis. 5: S – Serious Contamination; L – Environmental Risk Limit for soil; LB – Environmental Risk Limit for soil or bedded sediment 

8: Entry is lowest value among AET tests: I - Infaunal community impact ; A - Amphipod ; B - Bivalve ; M- Microtox bioassay ; O - Oyster larvae ; E - Echinoderm larvae ; L - Larvalmax ; or , N - Nea

For more information, email SQuiRT@NOAA.gov Pg 

8 

FRESHWATER SEDIMENT DUTCH Sediment 5 MARINE 

ANALYTE 

All concentrations in parts per billion 

dry weight unless specified otherwise

CAS 

Number ARCS

Hyalella

TEL1

TEL 2 TEC 2 LEL 3 PEL 2 PEC 2 SEL 3 UET 4

@1%TOC Target Intervention T20 6 TEL 7 ERL 7 

2,3,7,8-TCDD dioxin TEQs 1746016 0.00085 c 0.0215 c 0.0088†H 1 S 0.00085 c Acenaphthene 83329 6.71 c 88.9 c 290 M 19 6.71 16 Acenaphthylene 208968 5.87 c 128 c 160 M 14 5.87 44 Acrylonitrile 107131 0.07 100 S Aldrin 309002 2 80 40 I 0.06 1,700 LB Aldrin + Dieldrin + Endrin na 5 140 L Anthracene 120127 10 46.9 c 57.2 220 245 c 845 3,700 260 M 39 LB 1,600 LB 34 46.9 85.3 Atrazine 1912249 0.2 710 LB BCH compounds (sum) na 10 6,400 L Benz[a]anthracene 56553 15.72 31.7 108 320 385 1,050 14,800 500 I 25 L 2,500 L 61 74.8 261 Benzene 71432 10 1,000 Benzo(ghi)perylene 191242 170 3,200 300 M 570 LB 33,000 LB 67 Benzo[a]pyrene 50328 32.4 31.9 150 370 782 1,450 14,400 700 I 52 L 7,000 L 69 88.8 430 Benzo[b]fluoranthene 205992 130 Benzo[k]fluoranthene 207089 27.2 240 13,400 13,400B 380 LB 38,000 LB 70 Benzoic acid 65850 Benzyl alcohol 100516 BHC, alpha (α-HCH) 319846 6 100 3 < 2,000 BHC, beta (β-HCH) 319857 5 210 9 < 2,000 BHC, delta (δ-HCH) 319868 < 10 < 2,000 BHC, gamma- (γ-HCH; Lindane) 58899 0.94 2.37 3 1.38 4.99 10 9 I 0.05 1,200 L 0.32 Biphenyl 92524 17 Bis(2-ethylhexyl)phthalate (DEHP) 117817 750 †M < 100 10,000 LB 182 Bromoform (Tribromomethane) 75252 75,000 Butanol 35296721 30,000 S Butyl acetate, 1- or 2- na 200,000 S Butyl benzyl phthalate 85687 < 100 48,000 LB Carbaryl 63252 0.03 450 LB Carbofuran 1563662 0.02 17 LB Carbon tetrachloride (Tetrachloromethane;Tetra) 56235 170 LB 1,000 
Screening Quick Reference Tables for Organics – Se

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or 

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data 

4: Entry is lowest, reliable value among AET tests, on 1% TOC basis: I - Infaunal community impact ; M - Microtox bioassay ; H - Hyalella azteca bioassay ; † - value on dry weight basis. 5: S – Serious Contamination; L – Environmental Risk Limit for soil; LB – Environmental Risk Limit for soil or bedded sediment 

8: Entry is lowest value among AET tests: I - Infaunal community impact ; A - Amphipod ; B - Bivalve ; M- Microtox bioassay ; O - Oyster larvae ; E - Echinoderm larvae ; L - Larvalmax ; or , N - Nea

For more information, email SQuiRT@NOAA.gov Pg 

9 

FRESHWATER SEDIMENT DUTCH Sediment 5 MARINE 

ANALYTE 

All concentrations in parts per billion 

dry weight unless specified otherwise

CAS 

Number ARCS

Hyalella

TEL1

TEL 2 TEC 2 LEL 3 PEL 2 PEC 2 SEL 3 UET 4

@1%TOC Target Intervention T20 6 TEL 7 ERL 7 

Catechol (o-Dihydroxybenzene) 120809 3.2 LB 2,600 LB Chlordane 57749 4.5 3.24 7 8.9 17.6 60 30 I 0.03 4,000 2.26 0.5 Chlordane (alpha) 5103719 < 0.03 < 4,000 Chlordane (gamma) 5103742 < 0.03 < 4,000 Chloro, 4- 2-methyl phenol 1570645 < 15,000 S Chloro, 4- 2-methylphenoxy acetic acid (MCPA) 94746 0.05 4,000 Chloro, 4- 3-methyl phenol 59507 < 15,000 S Chloro, 4- methyl phenols na 15,000 S Chloroaniline 27134265 5 50,000 Chlorobenzenes (sum) na 30 30,000 Chloroform (trichloromethane) 67663 20 10,000 Chloronaphthalene, 1- 90131 57 LB < 10,000 Chloronaphthalene, 2- 91587 250 LB < 10,000 Chlorophenol, 2- 95578 55 LB 7,800 LB Chlorophenol, 3- 108430 35 L 14,000 L Chlorophenol, 4- 106489 20 LB 1,400 LB Chlorophenols (sum) na 10 10,000 Chrysene 218019 26.83 57.1 166 340 862 1,290 4,600 800 I 8,100 LB 35,000 LB 82 108 384 Cresol [m-] (3-Methyl phenol) 108394 1,600 L 16,000 L Cresol [o-] (2-Methyl phenol) 95487 500 L 50,000 L Cresol [p-] (4-Methyl phenol) 106445 5.1 LB 2,600 LB Cresols, sum 1319773 50 5,000 Cyclohexanone 108941 100 45,000 DDD, 4,4- (p,p-DDD, TDE) 72548 3.54 4.88 8 8.51 28 60 < 60 I 3.9 LB 34,000 LB 1.22 2 DDE, 4,4- (p,p-DDE) 72559 1.42 3.16 5 6.75 31.3 190 <50 I 5.8 LB 1,300 LB 2.07 2.2 DDT, 4,4- (p,p-DDT) 50293 1.19 c 4.16 8 4.77 c 62.9 710 50 I 9.8 LB 1,000 L 1.19 1 DDT+DDE+DDD (sum) na 7 5.28 7 4,450 572 120 50 I 10 4,000 3.89 1.58 Diazinon 333415 Dibenz[ah]anthracene 53703 10 6.22 c 33 60 135 c 1,300 100 M 19 6.22 63.4 Dibenzofuran 132649 5,100 H 
Screening Quick Reference Tables for Organics – Se

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or 

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data 

4: Entry is lowest, reliable value among AET tests, on 1% TOC basis: I - Infaunal community impact ; M - Microtox bioassay ; H - Hyalella azteca bioassay ; † - value on dry weight basis. 5: S – Serious Contamination; L – Environmental Risk Limit for soil; LB – Environmental Risk Limit for soil or bedded sediment 

8: Entry is lowest value among AET tests: I - Infaunal community impact ; A - Amphipod ; B - Bivalve ; M- Microtox bioassay ; O - Oyster larvae ; E - Echinoderm larvae ; L - Larvalmax ; or , N - Nea

For more information, email SQuiRT@NOAA.gov Pg 10 

FRESHWATER SEDIMENT DUTCH Sediment 5 MARINE 

ANALYTE 

All concentrations in parts per billion 

dry weight unless specified otherwise

CAS 

Number ARCS

Hyalella

TEL1

TEL 2 TEC 2 LEL 3 PEL 2 PEC 2 SEL 3 UET 4

@1%TOC Target Intervention T20 6 TEL 7 ERL 7 

Dichloroaniline, 2,4- 554007 < 5 < 50,000 S Dichloroaniline, 3,4- 95761 < 5 < 50,000 S Dichloroaniline, 3,4- 95761 < 5 < 50,000 S Dichlorobenzene, 1,2- 95501 < 30 17,000 LB Dichlorobenzene, 1,3- 541731 < 30 24,000 LB Dichlorobenzene, 1,4- 106467 < 30 18,000 LB Dichlorobenzenes 25321226 < 30 19,000 LB Dichloroethane, 1,1- 75343 20 15,000 Dichloroethane, 1,2- 107062 20 4,000 Dichloroethene, 1,1- (vinylidene chloride) 75354 100 300 Dichloroethene, 1,2- (cis or trans) 540590 200 1,000 Dichlorophenol, 2,4- 120832 < 10 8,400 LB Dichlorophenol, 2,6- 87650 < 10 57,000 LB Dichlorophenol, 3,4- 95772 < 10 57,000 LB Dichlorophenol, 3,5- 591355 < 10 5,400 LB Dichlorophenols (sum) na < 10 22,000 LB Dichloropropane, 1,2- (propylene dichloride) 78875 < 2 < 2,000 Dieldrin ‡ 60571 2.85 1.9 2 6.67 61.8 910 300 I 0.5 1,900 LB 0.83 0.72 0.02 Diethyl phthalate 84662 530 L 53,000 L Diethylene-glycol 111466 270,000 S Dihydroxybenzenes, sum na 62 LB 8,000 LB Di-iso-butyl phthalate 84695 92 LB 17,000 LB Dimethyl phthalate 131113 1,000 LB 84,000 LB Dimethylnaphthalene, 2,6- 581420 25 Dimethylphenol, 2,4- 105679 Di-n-butyl phthalate 84742 110 H 7,000 LB 36,000 LB Di-n-octyl phthalate 117840 < 100 < 60,000 Dodecylbenzene 25155300 1,000,000 S Endosulfan (a or b) 115297 0.01 4,000 
Screening Quick Reference Tables for Organics – Se

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or 

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data 

4: Entry is lowest, reliable value among AET tests, on 1% TOC basis: I - Infaunal community impact ; M - Microtox bioassay ; H - Hyalella azteca bioassay ; † - value on dry weight basis. 5: S – Serious Contamination; L – Environmental Risk Limit for soil; LB – Environmental Risk Limit for soil or bedded sediment 

8: Entry is lowest value among AET tests: I - Infaunal community impact ; A - Amphipod ; B - Bivalve ; M- Microtox bioassay ; O - Oyster larvae ; E - Echinoderm larvae ; L - Larvalmax ; or , N - Nea

For more information, email SQuiRT@NOAA.gov Pg 11 

FRESHWATER SEDIMENT DUTCH Sediment 5 MARINE 

ANALYTE 

All concentrations in parts per billion 

dry weight unless specified otherwise

CAS 

Number ARCS

Hyalella

TEL1

TEL 2 TEC 2 LEL 3 PEL 2 PEC 2 SEL 3 UET 4

@1%TOC Target Intervention T20 6 TEL 7 ERL 7 

Endosulfan II 33213659 Endrin 72208 2.67 2.22 3 62.4 207 1,300 500 I 0.04 95 L Ethyl acetate 141786 75,000 S Ethyl acetate 141786 75,000 S Ethyl benzene 100414 30 50,000 Ethylene glycol 107211 100,000 S Fluoranthene 206440 31.46 111 423 750 2,355 2,230 10,200 1,500 M 1,000 LB 260,000 119 113 600 Fluorene 86737 10 21.2 c 77.4 190 144 c 536 1,600 300 M 19 21.2 19 Formaldehyde 50000 100 S Guthion (Azinphos-methyl) 865000 0.005 2,000 S Heptachlor 76448 10 I 0.7 4,000 Heptachlorepoxide 1024573 0.6 2.47 5 2.74 16 50 30 I 0.0002 4,000 0.6 c Hexachlorobenzene 118741 20 240 100 I 1.4 LB 2,000 LB Hexachlorobutadiene (HCBD) 87683 Hexachlorocyclohexane (BHC) 608731 3 120 100 IHexachloroethane 67721 Hydroquinone (p-dihydroxybenzene) 123319 50 43,000 LB Indeno[1,2,3-cd]pyrene 193395 17.32 200 3,200 330 M 31 LB 1,900 LB 68 Linar alkylbenzene sulfonates (LAS) na <12,800 € Malathion 121755 Maneb 12427382 2 22,000 L Methanol 67561 30,000 S Methoxychlor 72435 Methyl ethyl ketone (MEK; 2-Butanone) 78933 35,000 S Methyl naphthalene, 2- 91576 21 20.2 70 Methylene chloride (Dichloromethane, DCM) 75092 18 LB 3,900 L Methylnaphthalene, 1- 90120 21 Methylphenanthrene, 1- 832699 18 Methyl-tert-butyl ether (MTBE) 1634044 100,000 S Mirex 2385855 7 1,300 800 I
Screening Quick Reference Tables for Organics – Se

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or 

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data 

4: Entry is lowest, reliable value among AET tests, on 1% TOC basis: I - Infaunal community impact ; M - Microtox bioassay ; H - Hyalella azteca bioassay ; † - value on dry weight basis. 5: S – Serious Contamination; L – Environmental Risk Limit for soil; LB – Environmental Risk Limit for soil or bedded sediment 

8: Entry is lowest value among AET tests: I - Infaunal community impact ; A - Amphipod ; B - Bivalve ; M- Microtox bioassay ; O - Oyster larvae ; E - Echinoderm larvae ; L - Larvalmax ; or , N - Nea

For more information, email SQuiRT@NOAA.gov Pg 12 

FRESHWATER SEDIMENT DUTCH Sediment 5 MARINE 

ANALYTE 

All concentrations in parts per billion 

dry weight unless specified otherwise

CAS 

Number ARCS

Hyalella

TEL1

TEL 2 TEC 2 LEL 3 PEL 2 PEC 2 SEL 3 UET 4

@1%TOC Target Intervention T20 6 TEL 7 ERL 7 

Monochloroaniline (3 isomers) na 5 50,000 Monochlorobenzenes 108907 < 30 15,000 LB Monochloronaphthalenes na 120 LB 10,000 Monochlorophenols (sum) na < 10 5,400 L Naphthalene 91203 14.65 34.6 c 176 391 c 561 600 I 120 LB 17,000 LB 30 34.6 160 Nitrobenzene 98953 Nitrosodiphenylamine, N- 86306 Nonylphenol 25154523 1,400 c 1,000 c PAHs, Low MW na 76.42 5,300 M < 1,000 < 40,000 312 552 PAHs, High MW na 193 6,500 M < 1,000 < 40,000 655 1,700 PAHs, Total na 264.1 1,610 4,000 22,800* 100,000* 12,000 M 1,000 40,000 1,684 4,022 PCB 105 32598144 1.5 LB < 1,000 PCB 126 57465288 0.0025 LB 920 LB PCB 77 32598131 0.42 LB < 1,00 PCB-Aroclor 1254 na 60 c 60 340 c 340 63.3 c PCBs (sum) 1336363 31.62 34.1 59.8 70 277 676 5,300 26 M 0.3 LB 1,000 35 21.6 22.7 Pentachloroaniline 527208 10,000 S Pentachlorobenzene 608935 15 LB 16,000 LB Pentachlorophenol [PCP: at ph 7.8‡] 87865 < 10 8,000 LB Perylene 198550 74 Phenanthrene 85018 18.73 41.9 204 560 515 1,170 9,500 800 I 3,300 LB 31,00 LB 68 86.7 240 Phenol 108952 48 † H 50 14,000 LB Phthalates (sum) na 100 60,000 Propanol, 2- (Isopropanol) 67630 220,000 S Pyrene 129000 44.27 53 195 490 875 1,520 8,500 1,000 i 125 153 665 Pyridine 110861 100 500 Resorcinol (m-dihydroxybenzene) 108463 34 LB 4,600 LB Styrene (Vinyl benzene) 100425 200 LB 86,000 LB Tetrachloroaniline, 2,3,5,6- 3481207 < 30,000 S Tetrachlorobenzene, 1,2,3,4- 634662 160 L 16,000 L Tetrachlorobenzene, 1,2,3,5- 634902 6.5 L 650 L 
Screening Quick Reference Tables for Organics – Se

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or 

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data 

4: Entry is lowest, reliable value among AET tests, on 1% TOC basis: I - Infaunal community impact ; M - Microtox bioassay ; H - Hyalella azteca bioassay ; † - value on dry weight basis. 5: S – Serious Contamination; L – Environmental Risk Limit for soil; LB – Environmental Risk Limit for soil or bedded sediment 

8: Entry is lowest value among AET tests: I - Infaunal community impact ; A - Amphipod ; B - Bivalve ; M- Microtox bioassay ; O - Oyster larvae ; E - Echinoderm larvae ; L - Larvalmax ; or , N - Nea

For more information, email SQuiRT@NOAA.gov Pg 13 

FRESHWATER SEDIMENT DUTCH Sediment 5 MARINE 

ANALYTE 

All concentrations in parts per billion 

dry weight unless specified otherwise

CAS 

Number ARCS

Hyalella

TEL1

TEL 2 TEC 2 LEL 3 PEL 2 PEC 2 SEL 3 UET 4

@1%TOC Target Intervention T20 6 TEL 7 ERL 7 

Tetrachlorobenzene, 1,2,4,5- 95943 10 L 1,000 L Tetrachlorobenzenes na 22 L 2,200 L Tetrachloroethylene (Tetrachloroethene; PCE; PER) 127184 2 4,000 Tetrachlorophenol, 2,3,4,5- 4901513 < 10 < 10,000 Tetrachlorophenol, 2,3,4,6- 58902 < 10 < 10,000 Tetrachlorophenols (sum) 25167833 < 10 < 10,000 Tetrahydrofuran 109999 100 2,000 Tetrahydrothiophene 110010 100 8,800 LB Toluene 108883 10 47,000 L Toxaphene 8001352 0.1 c 0.1 c Tributyltinoxide 56359 < 10 < 2,500 Trichloroaniline (multiple isomers) na 10,000 S Trichloroaniline, 2,4,5- 636306 < 10,000 S Trichlorobenzene, 1,2,3- 87616 < 11 L 5,000 L Trichlorobenzene, 1,2,4- 120821 11 LB 5,100 LB Trichlorobenzenes 12002481 38 L 11,000 L Trichloroethane, 1,1,1- 71556 70 15,000 Trichloroethane, 1,1,2- 79005 400 10,000 Trichloroethene (TCE) na 7.8 L 2,500 L Trichlorophenol, 2,3,5- na < 10 4,500 L Trichlorophenol, 2,4,5- 95954 < 10 22,000 LB Trichlorophenol, 2,4,6- 88062 < 10 110,000 LB Triclorophenols, (sum) na < 10 22,000 L Vinyl chloride 75014 10 100 Xylene 1330207 130 LB 17,000 LB Xylene, m- 108383 110 LB 18,000 LB Xylene, o- 95476 89 LB 9,300LB 
Screening Quick Reference Tables for Organics – Se

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or 

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data 

4: Entry is lowest, reliable value among AET tests, on 1% TOC basis: I - Infaunal community impact ; M - Microtox bioassay ; H - Hyalella azteca bioassay ; † - value on dry weight basis. 5: S – Serious Contamination; L – Environmental Risk Limit for soil; LB – Environmental Risk Limit for soil or bedded sediment 

8: Entry is lowest value among AET tests: I - Infaunal community impact ; A - Amphipod ; B - Bivalve ; M- Microtox bioassay ; O - Oyster larvae ; E - Echinoderm larvae ; L - Larvalmax ; or , N - Nea

For more information, email SQuiRT@NOAA.gov Pg 14 Sources 1 – Assessment & Remediation of Contaminated Sediments (ARCS) Program, Sept 1996. EPA 905-R96-008. 

2 – MacDonald et al, 2000. Arch ET&C 39(1):20- 

C – Canadian Sediment Quality Guidelines for the Protection of Aquatic Life, Summary Tables Update 2002, www.ccme.ca/publications/ceqg_rcqe.html

3 – Persuad 1993. Guidelines for the Protection and Management of Aquatic Sediment Quality in Ontario. Thompson et al., 2005. Enval Monitor & Assessment 110:71- 4 – Buchman 1999. NOAA HAZMAT Report 99-1. 5 – Entry is lower of current VROM Environmental Quality standards or the updated RIVM Environmental Risk Limits. Risk limits are typically divided by 100 to derive the Target value

Dutch Target/Intervention: E.M.J. Verbruggen, R. Posthumus and A.P. van Wezel, 2001. Ecotoxicological Serious Risk Concentrations for soil, sediment, and (ground)water: updaNat. Inst. Public Health and the Env., and subsequent updates as published elsewhere. Min. Housing, Spatial Plan. And the Env., 2000. Annexes Circular on target values and intervention values for soil remediations. 

6 – Field et al., 2002. ET&C 21:1993- 7 – MacDonald et al., 1996. Ecotox. 5(4):253- 

C – Canadian Sediment Quality Guidelines for the Protection of Aquatic Life, Summary Tables Update 2002, www.ccme.ca/publications/ceqg_rcqe.html

€ - DelValls et al., 1999. Ecotox. & Env Rest 2(1):34- 

8 – Wash Dept Ecol Publ 95-308, 1995 and 97-323a, 1997 

Gries & Waldrow Puget Sound Dredged Disposal Analysis Rept 1996. http://www.ecy.wa.gov/biblio/wac173204.html

plus unpublished information. 

9 – EcoUpdate EcoTox Thresholds, http://www.epa.gov/oswer/riskassessment/
Screening Quick Reference Tables for Organic in W

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1: L – Environmental Risk Limit; S – Serious Contamination Level 3: p - proposed; * - LOEL; C - value for chemical class; S - value for summation of isomers; (1⁄2) - CMC is halved to compare to 1985 Guideline derivation; x 0.1 – chronic value derived by division of a7: M – microbes; A – avian 

For more information, email SQuiRT@NOAA.gov Pg 15 

GROUND WATER SURFACE WATERS 

Dutch 1 Fresh Marine

ANALYTE 

All concentrations in parts per billion 

unless specified otherwise

CAS 

Number

Target Intervention

MCL 2

Acute 3 Chronic 3 Acute 3 Chronic 3

Invertebrates4 M

2,3,7,8-TCDD (dioxin TEQs) 1746016 0.001 ng/L S 0.00003 <0.01 * <0.00001 * 02,4,5-Trichlorphenoxyacetic acid (2,4,5-T) 93765 9 W 36 NZ 2,4-Dichlorophenoxyacetic acid (2,4-D) 94757 70 4.0 CA Acenaphthene 83329 1,700 * 5.8 CA 970 * 40 Eco Acenaphthylene 208968 4,840 V 300 *C Acetone 67641 28,000 T 1,500 T Acetonitrile 75058 160 NZ Acetophenone 98862 Acetylaminofluorene, 2- 53963 Acridine 260946 4.4 CA Acrolein 107028 68 * 0.01 NZ 55 * 0.1 NZ Acrylonitrile 107131 0.08 5 S 7,550 * 2,600 * Alcohol ethoxylated surfactants (AE) na 140 NZ Alcohol ethoxyolated sulfate (AES) na 650 NZ Aldicarb 116063 9 C 1 CA 0.15 CA Aldrin 309002 0.009 ng/L < 0.1 1.5 (1⁄2) 0.017 V 0.65 (1⁄2) Aldrin+Dieldrin+Endrin na 0.1 <0.03 W Allyl chloride 107051 Aminobiphenyl, 4- 92671 Aminomethylphosphonic acid (AMPA) 1066519 0.797 L Amitrole 61825 22 NZ Aniline 62533 2.2 CA Anthracene 120127 0.0007 5 13 T 0.73 T 0.012 CA 300 *C Aramite 140578 Atrazine 1912249 29 ng/L 76 L 3 1.8 CA 10 BC Benz[a]anthracene 56553 0.0001 0.5 0.49 T 0.027 T 300 *C Benzene 71432 0.2 30 5 2,300 T 46 Eco 5,100 * 110 CA Benzidine 92875 70 T 3.9 T Benzo(ghi)perylene 191242 0.0003 0.05 7.64 V 300 *C Benzo[a]pyrene 50328 0.0005 0.05 0.2 0.24 T 0.014 T Eco 300 *C 
Screening Quick Reference Tables for Organic in W

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1: L – Environmental Risk Limit; S – Serious Contamination Level 3: p - proposed; * - LOEL; C - value for chemical class; S - value for summation of isomers; (1⁄2) - CMC is halved to compare to 1985 Guideline derivation; x 0.1 – chronic value derived by division of a7: M – microbes; A – avian 

For more information, email SQuiRT@NOAA.gov Pg 16 

GROUND WATER SURFACE WATERS 

Dutch 1 Fresh Marine

ANALYTE 

All concentrations in parts per billion 

unless specified otherwise

CAS 

Number

Target Intervention

MCL 2

Acute 3 Chronic 3 Acute 3 Chronic 3

Invertebrates4 M

Benzo[b]fluoranthene 205992 9.07 V 300 *C Benzo[k]fluoranthene 207089 0.0004 0.05 300 *C Benzoic acid 65850 740 T 42 T Benzyl alcohol 100516 150 T 8.6 T BHC, alpha (

-HCH) 319846 33 ng/L <1 39 T 2.2 T 

BHC, beta (-HCH) 319857 8 ng/L <1 39 T 2.2 T 0.495 V BHC, delta -HCH) 319868 < 0.05 <1 39 T 2.2 T BHC, gamma- (-HCH; Lindane) 58899 9 ng/L <1 0.2 0.95 0.08 0.08 (1⁄2) BHC (sum) na 0.05 1 < 0.95 < 0.08 < 0.08 Biphenyl 92524 14 T Eco Bis(2-chloroethoxy) methane 111911 11,000 *C 12,000 *C 6,400 *C Bis(2-chloroethyl) ether 111444 1,900 V Bis(2-ethylhexyl)phthalate (DEHP) 117817 1.9 ng/L L < 5 6 400 p 

32 Eco 

16 CA 

0.3 V 

400 p 360 p 

Bis-2-chloro-1-methylethylether 108601 Bromocil 314409 5 CA Bromodichloromethane  (Dichlorobromomethane) 75274 60 W 11,000 *C 12,000 *C 6,400 *C Bromoform (Tribromomethane) 75252 630 2,300 T 320 T Eco Bromoxynil 1689845 5 C 5 CA Butanol 35296721 5,600 S Butyl acetate, 1- or 2- na 6,300 S Butyl benzyl phthalate 85687 2.9 ng/L L < 5 940 *C 19 T Eco 2,944 *C 3.4 *C Captan 133062 1.3 CA Carbaryl 63252 2 ng/L 41 L 90 C 0.2 CA 0.32 CA Carbofuran 1563662 9 ng/L 6.5 L 40 1.8 CA 0.06 NZ Carbon disulfide 75150 17 T 0.92 T Carbon tetrachloride (Tetrachloromethane;Tetra) 56235 0.01 10 5 180 T 9.8 T 50,000 * 5,000 x 0.1 Catechol (o-Dihydroxybenzene) 120809 0.2 630 L 
Screening Quick Reference Tables for Organic in W

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1: L – Environmental Risk Limit; S – Serious Contamination Level 3: p - proposed; * - LOEL; C - value for chemical class; S - value for summation of isomers; (1⁄2) - CMC is halved to compare to 1985 Guideline derivation; x 0.1 – chronic value derived by division of a7: M – microbes; A – avian 

For more information, email SQuiRT@NOAA.gov Pg 17 

GROUND WATER SURFACE WATERS 

Dutch 1 Fresh Marine

ANALYTE 

All concentrations in parts per billion 

unless specified otherwise

CAS 

Number

Target Intervention

MCL 2

Acute 3 Chronic 3 Acute 3 Chronic 3

Invertebrates4 M

Chlordane 57749 0.02 ng/L 0.2 2 1.2 (1⁄2) 0.00215 (1⁄2) 0.045 (1⁄2) 0.002 (1⁄2) Chlordane (alpha) 5103719 < 0.02 ng/L < 0.2 Chlordane (gamma) 5103742 < 0.02 ng/L < 0.2 Chlorfenvinphos 470906 0.1 EU 0.1 EU Chloroacetamide 79072 2,000 Chloroaniline 27134265 30 Chloroaniline, 3- 108429 < 30 30,000 Chloroaniline, 4- 106478 < 30 250 *C 50 *C 160 *C 129 *C Chlorobenzenes (sum) na < 7 < 180 100 130 Eco <47 V < 40,000 Chlorobenzilate 510156 Chloroform (trichloromethane) 67663 6 400 200 W 490 T 1.8 CA Chloro, 4- 2-methyl phenol 1570645 < 350 S Chloro, 4- 3-methyl phenol 59507 < 350 S Chloro, 4- methyl phenols na 350 S Chloro, 4- 2-methylphenoxy acetic acid  (MCPA) 94746 0.02 50 2 W 2.6 CA 4.2 CA Chloronaphthalene, 1- 90131 3.7 ng/L L < 6 Chloronaphthalene, 2- 91587 0.016 L < 6 1,600 * C 0.396 V 7.5 * C Chlorophenol, 2- 95578 < 0.3 < 100 4,380 * 490 NZ 24 V Chlorophenol, 3- 108430 < 0.3 < 100 10,000 Chlorophenol, 4- 106489 < 0.3 < 100 220 NZ Chlorophenols (sum) na 0.3 100 < 24 V < 10,000 Chloroprene 126998 Chlorothalonil 1897456 200 BC 0.18 CA 0.36 CA Chlorpyrifos 2921882 30 W 0.083 0.041 0.011 0.0056 Chrysene 218019 0.003 0.2 300 *C Cresol [m-] (3-Methyl phenol) 108394 < 0.2 < 200 Cresol [o-] (2-Methyl phenol) 95487 < 0.2 <200 230 T 13 T Cresol [p-] (4-Methyl phenol) 106445 < 0.2 < 200 Cresols, sum 1319773 0.2 200 < 230 T < 13 T Cyclohexanone 108941 0.5 15,000 
Screening Quick Reference Tables for Organic in W

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1: L – Environmental Risk Limit; S – Serious Contamination Level 3: p - proposed; * - LOEL; C - value for chemical class; S - value for summation of isomers; (1⁄2) - CMC is halved to compare to 1985 Guideline derivation; x 0.1 – chronic value derived by division of a7: M – microbes; A – avian 

For more information, email SQuiRT@NOAA.gov Pg 18 

GROUND WATER SURFACE WATERS 

Dutch 1 Fresh Marine

ANALYTE 

All concentrations in parts per billion 

unless specified otherwise

CAS 

Number

Target Intervention

MCL 2

Acute 3 Chronic 3 Acute 3 Chronic 3

Invertebrates4 M

DDD, 4,4- (p,p-DDD, TDE) 72548 <0.004 ng/L < 0.01 < 1 W 0.19 T 0.011 T 3.6 * 0.36 x 0.1 DDE, 4,4- (p,p-DDE) 72559 <0.004 ng/L < 0.01 < 1 W 1,050 * 105 x 0.1 14 * 1.4 x 0.1 DDT, 4,4- (p,p-DDT) 50293 <0.004 ng/L < 0.01 < 1 W 0.55 (1⁄2) 0.0005 (1⁄2) 0.065 (1⁄2) 0.0005 (1⁄2) DDT+DDE+DDD (sum) na 0.004 ng/L 0.01 1 W <0.55 (1⁄2) <0.0005 (1⁄2) <0.065 (1⁄2) <0.0005 (1⁄2) Decane 124185 880 T 49 T Deltamethrin 52918635 0.0004 CA Demeton 8065483 0.1 0.1 Diallate 2303164 Diazinon 333415 20 C 0.17 0.17 0.82 0.82 Dibenz[ah]anthracene 53703 300 *C Dibenzofuran 132649 66 T 3.7 T Dibromo, 1,2- 3-chloropropane (DBCP) 96128 0.2 Dibromochloromethane  (Chlorodibromomethane) 124481 100 W 11,000 *C 12,000 *C 6,400 *C Dibromoethane, 1,2- 106934 0.4 W Dicambia 1918009 120 C 10 CA Dichloro, 1,4- 2-butene (cis) 1476115 Dichloro, 1,4- 2-butene (trans) 110576 Dichloroaniline, 2,4- 554007 < 100 S 7 NZ 100,000 Dichloroaniline, 3,4- 95761 < 100 S 3 NZ 150 NZ 20,000 Dichlorobenzene, 1,2- 95501 < 3 < 50 600 260 T 0.7 CA < 1,970 *S 42 CA Dichlorobenzene, 1,3- 541731 < 3 < 50 630 T 71 T Eco 38 V < 1,970 *S Dichlorobenzene, 1,4- 106467 < 3 < 50 75 180 T 

15 T Eco 

60 NZ 

9.4 V 

< 1,970 *S 129 *C 20,000 

Dichlorobenzenes 25321226 3 50 < 75 < 180 T < 0.7 CA 1,970 *S < 20,000 Dichlorobenzidine, 3,3- 91941 4.5 V Dichlorodifluoromethane 75718 Dichloroethane, 1,1- 75343 7 900 830 T 47 T Eco Dichloroethane, 1,2- 107062 7 400 5 8,800 T 100 CA 113,000 * 11,300 x 0.1 
Screening Quick Reference Tables for Organic in W

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1: L – Environmental Risk Limit; S – Serious Contamination Level 3: p - proposed; * - LOEL; C - value for chemical class; S - value for summation of isomers; (1⁄2) - CMC is halved to compare to 1985 Guideline derivation; x 0.1 – chronic value derived by division of a7: M – microbes; A – avian 

For more information, email SQuiRT@NOAA.gov Pg 19 

GROUND WATER SURFACE WATERS 

Dutch 1 Fresh Marine

ANALYTE 

All concentrations in parts per billion 

unless specified otherwise

CAS 

Number

Target Intervention

MCL 2

Acute 3 Chronic 3 Acute 3 Chronic 3

Invertebrates4 M

Dichloroethene, 1,1- (vinylidene chloride) 75354 0.01 10 7 450 T 25 T 224,000 *S Dichloroethene, 1,2- (cis or trans) 540590 0.01 20 70 cis 1,100 T 590 T 224,000 *S Dichloroethene, 1,2- (trans) 156605 100 11,600 *S 1,160 x 0.1 224,000 *S Dichlorophenol, 2,4- 120832 < 0.2 < 30 900 C 2,020 * 160 NZ 11 V Dichlorophenol, 2,6- 87650 < 0.2 < 30 < 0.2 CA Dichlorophenol, 3,4- 95772 < 0.2 < 30 < 0.2 CA 20,000 Dichlorophenol, 3,5- 591355 < 0.2 < 30 < 0.2 CA Dichlorophenols (sum) na 0.2 30 < 900 C <2,020 * 0.2 CA < 20,000 Dichloropropane, 1,2-  (propylene dichloride) 78875 < 0.08 < 80 5 23,000 *S 5,700 *S 10,300 *S 3,040 *S 700,000 Dichloropropene, 1,3- 542756 20 W 0.99 T 0.055 T 790 *S Dichloropropene, 1,3- (cis) 10061015 < 20 W < 0.99 T < 0.055 T Dichloropropene, 1,3- (trans) 10061026 < 20 W < 0.99 T < 0.055 T Diclofop-methyl 51338273 9 C 6.1 CA Dicofol 115322 0.5 NZ 0.1 NZ Didecyl dimethyl ammonium chloride  (DDAC) 7173515 1.5 CA Dieldrin ‡ 60571 0.1 ng/L < 0.1 0.24 0.056 0.355 (1⁄2) 0.00095 (1⁄2) Diethyl phthalate 84662 < 0.5 < 5 1,800 T 210 T 110 V 2,944 *C 3.4 *C Diethylene-glycol 111466 13,000 S Dihydroxybenzenes, sum na 0.24 L Di-iso-butyl phthalate 84695 < 0.5 < 5 Dimethoate 60515 6 W 6.2 CA 0.15 NZ Dimethyl aminoazobenzene [p-] 60117 Dimethyl benz(a)anthracene, 7,12- 57976 Dimethyl benzidine, 3,3- 119937 Dimethyl naphthalene, 2,6- 581420 Dimethyl phenethylamine [alpha,alpha] 122098 Dimethyl phenol, 2,4- 105679 2,120 * 100 V Dimethyl phthalate 131113 < 0.5 < 5 940 *C 3 *C 2,944 *C 3.4 *C 200,000 
Screening Quick Reference Tables for Organic in W

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1: L – Environmental Risk Limit; S – Serious Contamination Level 3: p - proposed; * - LOEL; C - value for chemical class; S - value for summation of isomers; (1⁄2) - CMC is halved to compare to 1985 Guideline derivation; x 0.1 – chronic value derived by division of a7: M – microbes; A – avian 

For more information, email SQuiRT@NOAA.gov Pg 20 

GROUND WATER SURFACE WATERS 

Dutch 1 Fresh Marine

ANALYTE 

All concentrations in parts per billion 

unless specified otherwise

CAS 

Number

Target Intervention

MCL 2

Acute 3 Chronic 3 Acute 3 Chronic 3

Invertebrates4 M

Di-n-butyl phthalate 84742 < 0.5 < 5 190 T 19 CA 9.7 V 2,944 *C 3.4 *C Dinitrobenzene, 1,3- 99650 Dinitrophenol, 2,4- 51285 230 *C 45 NZ 19 V 4,850 *C Dinitrotoluene, 2,4- 121142 330 * 65 NZ 44 V 590 * S 370 *S Dinitrotoluene, 2,6- 606202 Di-n-octyl phthalate 117840 < 0.5 < 5 940 *C 3 *C 2,944 *C 3.4 *C Dinoseb 88857 7 0.05 CA Dioxane, 1,4- 123911 Dioxins (sum of PCDDs) na 0.001 ng/L S 0Diphenlyhydrazine 1,2- 122667 270 * 27 x 0.1Diphenylamine 122394 Diquat 85007 20 1.4 NZ Disulfoton 298044 Diuron 330541 150 C 0.1EU 0.1EU Dodecylbenzene 25155300 0.02 S Endosulfan (or or 115297 0.2 ng/L 5 0.11 (1⁄2) 0.028 (1⁄2) 0.017 (1⁄2) 0.00435 (1⁄2) Endosulfan sulfate 1031078 2.22 V Endrin 72208 0.04 ng/L < 0.1 2 0.086 0.036 0.0185 (1⁄2) 0.00115 (1⁄2) Endrin aldehyde 7421934 0.15 V Esfenvalerate 66230044 0.001 NZ Ethanol 64175 1,400 NZ Ethyl acetate 141786 15,000 S Ethyl benzene 100414 4 150 700 130 T 7.3 T 14 V 430 * 25 CA Ethyl methacrylate 97632 Ethylene glycol 107211 5,500 S 192,000 CAFamphur 52857 Fenitrothion 122145 0.2 NZ Fluoranthene 206440 0.003 1 3,980 * 0.04 CA 40 * 11 Eco Fluorene 86737 70 T 3.9 T Eco 300 *C 30,000 
Screening Quick Reference Tables for Organic in W

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1: L – Environmental Risk Limit; S – Serious Contamination Level 3: p - proposed; * - LOEL; C - value for chemical class; S - value for summation of isomers; (1⁄2) - CMC is halved to compare to 1985 Guideline derivation; x 0.1 – chronic value derived by division of a7: M – microbes; A – avian 

For more information, email SQuiRT@NOAA.gov Pg 21 

GROUND WATER SURFACE WATERS 

Dutch 1 Fresh Marine

ANALYTE 

All concentrations in parts per billion 

unless specified otherwise

CAS 

Number

Target Intervention

MCL 2

Acute 3 Chronic 3 Acute 3 Chronic 3

Invertebrates4 M

Formaldehyde 50000 50 S 900 W Furan 110009 Glyphosate 1071836 280 C 65 CA Guthion (azinphos-methyl) 865000 0.1 ng/L 2 S 20 C 0.01 0.02 NZ 0.01 Heptachlor 76448 0.005 ng/L 0.3 0.4 0.26 (1⁄2) 0.0019 (1⁄2) 0.0265 (1⁄2) 0.0018 (1⁄2) Heptachlor epoxide 1024573 0.005 ng/L 3 0.2 0.26 (1⁄2) 0.0019 (1⁄2) 0.0265 (1⁄2) 0.0018 (1⁄2) Hexachlorobenzene 118741 2.1E-7 L 0.5 1 6 p 3.68 p 0.0003 V 160 *C 129 *C Hexachlorobutadiene (HCBD) 87683 0.6 W 90 * 1.3 CA 0.053 V 32 * 3.2 x 0.1 Hexachlorocyclohexane (BHC) 608731 100 * 10 x 0.1 0.34 * 0.034 x 0.1Hexachlorocyclopentadiene 77474 50 7 * 5.2 * 7 * 0.7 x 0.1 Hexachloroethane 67721 210 T 12 T Eco 8 V 940 * 94 x 0.1 Hexachlorophene 70304 Hexane 110543 10 T 0.58 T Hexanone, 2- (methyl butyl ketone) 591786 1,800 T 99 T Hydroquinone (p-dihydroxybenzene) 123319 0.2 800 Indeno[1,2,3-cd]pyrene 193395 0.0004 0.05 4.31 V 300 *C lodo, 3- 2-propynl butyl carbamate (IPBC) 55406536 1.9 CA Isodrin 465736 Isophorone 78591 117,000 * 1,170 x 0.1 920 V 12,900 * 1,290 x 0.1 Isoproturon 34123596 9 W 0.1 EU 0.1 EU Isosafrole 120581 Kepone 143500 Linar alkylbenzene sulfonates (LAS) na 280 NZ Linuron 335502 7.0 CA Malathion 121755 190 C 0.1 0.1 Maneb 12427382 0.05 ng/L 0.1 Methacrylonitrile 126987 Methanol 67561 24,000 S 
Screening Quick Reference Tables for Organic in W

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1: L – Environmental Risk Limit; S – Serious Contamination Level 3: p - proposed; * - LOEL; C - value for chemical class; S - value for summation of isomers; (1⁄2) - CMC is halved to compare to 1985 Guideline derivation; x 0.1 – chronic value derived by division of a7: M – microbes; A – avian 

For more information, email SQuiRT@NOAA.gov Pg 22 

GROUND WATER SURFACE WATERS 

Dutch 1 Fresh Marine

ANALYTE 

All concentrations in parts per billion 

unless specified otherwise

CAS 

Number

Target Intervention

MCL 2

Acute 3 Chronic 3 Acute 3 Chronic 3

Invertebrates4 M

Methanol 67561 24,000 S Methapyrilene 91805 Methomyl 16752775 3.5 NZ Methoxychlor 72435 40 0.03 0.03 Methyl bromide 74839 16 V Methyl chloride 74873 Methyl cholanthrene, 3- 56495 Methyl, 2- 4,6-dinitrophenol 534521 Methyl ethyl ketone (MEK; 2-Butanone) 78933 6,000 S 240,000 T 14,000 T Methyl iodide 74884 Methyl methacrylate 80626 Methyl methanesulfanate 66273 Methyl naphthalene, 1- 90120 37 T 2.1 T Methyl naphthalene, 2- 91576 330 V 300 *C Methyl parathion 298000 Methyl, 4- 2-pentanone 108101 2,200 T 170 T Methyl-tert-butyl ether (MTBE) 1634044 9,200 S 10,000 CA 5,000 CA Methylene bromide (Dibromomethane) 74953 11,000 *C 12,000 *C 6,400 *C Methylene chloride (Dichloromethane, DCM) 75092 0.01 1,000 5 26,000 T 2,200 T 98.1 CA 12,000 *C 6,400 *C Metolachlor 51218452 10 W 7.8 CA Metribuzin 21087649 80 C 1 CA Mineral oil (Operationally defined) 8012951 50 600 Mirex 2385855 0.001 0.001 Molinate 2212671 6 W 3.4 NZ Monochloroaniline (3 isomers) na 30 Monochlorobenzenes 108907 7 180 100 1,100 T 1.3 CA 160 *C 25 CA 40,000 Monochloronaphthalenes 7.7 ng/L L 6 Monochlorophenols (sum) na 0.3 100 7 CA Naphthalene 91203 0.01 70 190 T 1.1 CA 2,350 * 1.4 CA Naphthoquinone, 1,4- 130154 
Screening Quick Reference Tables for Organic in W

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1: L – Environmental Risk Limit; S – Serious Contamination Level 3: p - proposed; * - LOEL; C - value for chemical class; S - value for summation of isomers; (1⁄2) - CMC is halved to compare to 1985 Guideline derivation; x 0.1 – chronic value derived by division of a7: M – microbes; A – avian 

For more information, email SQuiRT@NOAA.gov Pg 23 

GROUND WATER SURFACE WATERS 

Dutch 1 Fresh Marine

ANALYTE 

All concentrations in parts per billion 

unless specified otherwise

CAS 

Number

Target Intervention

MCL 2

Acute 3 Chronic 3 Acute 3 Chronic 3

Invertebrates4 M

Naphthylamine, 1- 134327 Naphthylamine, 2- 91598 Nitroaniline [m-] 99092 Nitroaniline [p-] 100016 Nitroaniline, 2- 88744 Nitrobenzene 98953 27,000 * 550 NZ 220 V 6,680 * 668 x 0.1 40,000 Nitro-o-toluidine, 5- 99558 Nitrophenol, 2- 88755 Nitrophenol, 4- 100027 1,200 T 300 T 60 V 4,850 *C 7,000 Nitroquinoline, 4- 1-oxide 56575 Nitrosodiethylamine, N- 55185 768 V Nitrosodimethylamine, N- 62759 Nitroso-di-n-butylamine, N- 924163 Nitroso-di-n-propylamine, N- 621647 Nitrosodiphenylamine, N- 86306 3,800 T 210 T 3,300,000*C 20,000 Nitrosomethylethylamine, N- 10595956 Nitrosomorpholine, N- 59892 Nitrosopiperidine, N- 100754 Nitrosopyrrolidine, N- 930552 Nonylphenol 25154523 28 6.6 7 1.7 O,O-diethyl O-2-

pyrazinylphosphorothioate 297972 

Octanone, 2- 111137 150 T 8.3 T PAHs, High MW na 300 *C 29,000 EPA 10PAHs, Low MW na 300 *C 18,000 EPA 1PAHs, Total na 300 *C Paraquat 4685147 0.5 NZ Parathion 56382 50 C 0.065 0.013 0.34 V PCBs (sum) 1336363 0.01 0.01 0.5 0.6 T 0.03 NZ 0.014 0.033 T 0.03 Pentachloroaniline 527208 1 S 100,000 
Screening Quick Reference Tables for Organic in W

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1: L – Environmental Risk Limit; S – Serious Contamination Level 3: p - proposed; * - LOEL; C - value for chemical class; S - value for summation of isomers; (1⁄2) - CMC is halved to compare to 1985 Guideline derivation; x 0.1 – chronic value derived by division of a7: M – microbes; A – avian 

For more information, email SQuiRT@NOAA.gov Pg 24 

GROUND WATER SURFACE WATERS 

Dutch 1 Fresh Marine

ANALYTE 

All concentrations in parts per billion 

unless specified otherwise

CAS 

Number

Target Intervention

MCL 2

Acute 3 Chronic 3 Acute 3 Chronic 3

Invertebrates4 M

Pentachlorobenzene 608935 0.003 1 8.4 T 0.47 T 0.019 V 160 *C 129 *C 20,000 Pentachloroethane 76017 7,240 * 1,100 * 390 * 281 * Pentachloronitrobenzene 82688 Pentachlorophenol [PCP: at pH 7.8] 87865 0.04 3 1.0 19 ph 15 Ph 13 7.9 6,000 Pentanol, 1- 71410 2,000 T 110 T Permethrin 52645531 0.004 CA 0.001 CA Phenacetin 62442 Phenanthrene 85018 0.003 5 30 p 6.3 p Eco 3.6 V 7.7 p 4.6 p Phenol 108952 0.2 2,000 10,200 * 320 NZ 180 V 5,800 * 400 NZ 30,000 Phenylenediamine [p-] 106503 Phorate 298022 2 C Phthalates (sum) na 0.5 5 Picloram 1918021 500 29 CA Picoline, 2- 109068 Polychlorinated dibenzofurans 51207319 Pronamide 23950585 Propanol, 2- (Isopropanol) 67630 31,000 S 130 T 7.5 T Propionitrile 107120 Propylene glycol 57556 500,000 CAPyrene 129000 0.025 CA 300 *C Pyridine 110861 0.5 30 Quinoline 91225 3.4 CA Resorcinol (m-dihydroxybenzene) 108463 0.2 600 Safrole 94597 Silvex (2,4,5-TP) 93721 50 Simazine 122349 4 10 CA 3.2 NZ 1 EU Styrene (Vinyl benzene) 100425 6 300 100 72 CA 32 V 
Screening Quick Reference Tables for Organic in W

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1: L – Environmental Risk Limit; S – Serious Contamination Level 3: p - proposed; * - LOEL; C - value for chemical class; S - value for summation of isomers; (1⁄2) - CMC is halved to compare to 1985 Guideline derivation; x 0.1 – chronic value derived by division of a7: M – microbes; A – avian 

For more information, email SQuiRT@NOAA.gov Pg 25 

GROUND WATER SURFACE WATERS 

Dutch 1 Fresh Marine

ANALYTE 

All concentrations in parts per billion 

unless specified otherwise

CAS 

Number

Target Intervention

MCL 2

Acute 3 Chronic 3 Acute 3 Chronic 3

Invertebrates4 M

Tebuthiuron 34014181 490 BC 1.6 CA 2.2 NZ Temephos 3383968 0.05 NZ 0.05 NZ Tetrachloroaniline, 2,3,5,6- 3481207 < 10 S 20,000 Tetrachlorobenzene, 1,2,3,4- 634662 < 0.01 < 2.5 250 *C 1.8 CA 160 *C 129 *C 10,000 Tetrachlorobenzene, 1,2,3,5- 634902 < 0.01 < 2.5 250 *C 160 *C 129 *C Tetrachlorobenzene, 1,2,4,5- 95943 < 0.01 < 2.5 250 *C 50 *C 3 V 160 *C 129 *C Tetrachlorobenzenes na 0.01 2.5 250 *C < 3 V 160 *C 129 *C < 10,000 Tetrachloroethane, 1,1,1,2- 630206 Tetrachloroethane, 1,1,2,2- 79345 2,100 T 111 CA 9,020 * 902 x 0.1 Tetrachloroethylene  (Tetrachloroethene; PCE; PER) 127184 0.01 40 5 830 T 98 T 45 V 10,200 * 450 * Tetrachlorophenol, 2,3,4,5- 4901513 < 0.01 < 10 < 1 CA 20,000 Tetrachlorophenol, 2,3,4,6- 58902 < 0.01 < 10 100 C 20 NZ 440 * 44 x 0.1 Tetrachlorophenols (sum) 25167833 0.01 10 1 CA < 20,000 Tetraethyldithiopyrophosphate 3689245 Tetrahydrofuran 109999 0.5 300 Tetrahydrothiophene 110010 0.5 5,000 Thiobencarb 28249776 2.8 NZ Thiram 137268 0.2 NZ 0.01 NZ Toluene 108883 7 1,000 1,000 120 T 9.8 T 2 CA 6,300 * 215 CA Toluidine [o-] 95534 Toxaphene 8001352 3 0.73 0.0002 0.21 0.0002 Triallate 2303175 0.24 CA Tributyltinoxide 56359 <0.05E-16 ng/L < 0.7 0.46 0.072 0.42 0.0074 Trichloroaniline (multiple isomers) na 10 S Trichloroaniline, 2,4,5- 636306 < 10 S 20,000 Trichlorobenzene, 1,2,3- 87616 < 0.10 < 10 8.0 CA 20,000 Trichlorobenzene, 1,2,4- 120821 < 0.10 < 10 70 700 T 24 CA 160 *C 5.4 CA 20,000 Trichlorobenzenes 12002481 0.01 10 < 70 < 700 T < 8 CA 160 *C <5.4 CA < 20,000 
Screening Quick Reference Tables for Organic in W

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1: L – Environmental Risk Limit; S – Serious Contamination Level 3: p - proposed; * - LOEL; C - value for chemical class; S - value for summation of isomers; (1⁄2) - CMC is halved to compare to 1985 Guideline derivation; x 0.1 – chronic value derived by division of a7: M – microbes; A – avian 

For more information, email SQuiRT@NOAA.gov Pg 26 

GROUND WATER SURFACE WATERS 

Dutch 1 Fresh Marine

ANALYTE 

All concentrations in parts per billion 

unless specified otherwise

CAS 

Number

Target Intervention

MCL 2

Acute 3 Chronic 3 Acute 3 Chronic 3

Invertebrates4 M

Trichloroethane, 1,1,1- 71556 0.01 300 200 200 T 11 T 31,200 * 3,120 x 0.1 Trichloroethane, 1,1,2- 79005 0.01 130 5 5,200 T 1,200 T 500 V 1,900 NZ Trichloroethene (TCE) 24 500 5 21 CA 2,000 * 200 x 0.1 Trichloroethene, 1,1,1- 71556 < 24 < 500 < 5 < 440 T < 21 CA Trichloroethene, 1,1,2- 79016 < 24 < 500 < 5 < 440 T < 21 CA Trichlorofluoromethane 75694 11,000 *C 12,000 *C 6,400 *C Trichlorophenol, 2,3,5- < 0.03 < 10 < 18 CA Trichlorophenol, 2,4,5- 95954 < 0.03 < 10 100 p 63 p 240 p 11 p 9,000 Trichlorophenol, 2,4,6- 88062 < 0.03 < 10 5 C 20 NZ 4.9 V 10,000 Triclorophenols, (sum) na 0.03 10 18 CA < 9,000 Trichloropropane, 1,2,3- 96184 Triethylphosphorothioate [O,O,O-] 126681 Trifluralin 1582098 20 W 0.2 CA 0.1EU Trinitrobenzene, 1,3,5- 99354 Trinitrotoluene, 2,4,6- 118967 140 NZ Vinyl acetate 108054 280 T 16 T Vinyl chloride 75014 0.01 5 2 930 V Xylene, m- 108383 < 0.2 < 70 32 T 1.8 T Eco Xylene, o- 95476 < 0.2 < 70 350 NZ Xylene, p- < 0.2 < 70 Xylenes 1330207 0.2 70 10,000 230 T 13 T 
Screening Quick Reference Tables for Organic in W

These tables were developed for internal use for screening purposes only: they do not represent official NOAA policy and do not const

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

For more information, email SQuiRT@NOAA.gov Pg 27 Sources 1 – Entry is lower of current VROM Environmental Quality standards or the updated RIVM Environmental Risk Limits. Risk limits are typically divided by 100 to derive the Target value

Dutch Target/Intervention: E.M.J. Verbruggen, R. Posthumus and A.P. van Wezel, 2001. Ecotoxicological Serious Risk Concentrations for soil, sediment, and (ground)water: updaInst. Public Health and the Env., and subsequent updates as published elsewhere. Min. Housing, Spatial Plan. And the Env., 2000. Annexes Circular on target values and intervention values for soil remediations. 

2 – Primary entry is the US EPA MCL value, followed by the lower of appropriate WHO, Canadian, or British Columbia guidelines. 

Maximum Contaminant Levels (MCLs): http://www.epa.gov/safewater/index.html

W – World Health Organization’s (WHO) Drinking water guidelines: http://www.who.int/water_sanitation_health/dwq/en/

C – Canadian Environmental Quality Guidelines for Community Water, Summary Table Update 2002: http://www.ccme.ca

BC – British Columbia Water Quality Guidelines (either working or recommended): http://www.env.gov.bc.ca/wat/wq/

3 – Primary entry is the US Ambient Water Quality Criteria, followed by the lowest of Tier II SAVs or available standards or guidelines. 

Lowest Observable Effect Levels (LOELs) previously published by EPA are also included since these essentially were the basis for many state standards. 

EPA Ambient water Quality Criteria (AWQC): http://www.epa.gov/waterscience/criteria/aqlife.html

T – Tier II Secondary Acute Value: http://www.esd.ornl.gov/programs/ecorisk/tools.html

Eco – EPA EcoUpdate, Ecotox Thresholds, EPA 540/F-95/038 

CA – Canadian water Quality Guidelines: http://www.ec.gc.ca/CEQG-RCQE/English/Ceqg/Water/default.cfm

BC – British Columbia Water Quality Guidelines (either working or recommended): http://www.env.gov.bc.ca/wat/wq/EU – European Union (EU) Environmental Quality Standards: COM(2006) 397 and 398 final. V – US EPA Region V Ecological Screening Levels: http://www.epa.gov/reg5rcra/ca/edql.htm

4 – Toxicological Benchmarks for Effects on Earthworms: http://www.esd.ornl.gov/programs/ecorisk/tools.html

EPA – Eco-SSL for Invertebrates: http://www.epa.gov/ecotox/ecossl/

Region V Ecological Screening Level for Invertebrates: http://www.epa.gov/reg5rcra/ca/

5 – Entry is lower of either: 

Region V Ecological Screening Level for shrew or vole: http://www.epa.gov/reg5rcra/ca/

EPA – Eco-SSL for Mammals: http://www.epa.gov/ecotox/ecossl/

6 – Toxicological Benchmarks for Effects on Terrestrial Plants: http://www.esd.ornl.gov/programs/ecorisk/tools.html

V – EPA Region V Ecological Screening Level for Plants: http://www.epa.gov/reg5rcra/ca/

7 – Entry is lower of either: 

M – Toxicological Benchmarks for Effects on Microbes: http://www.esd.ornl.gov/programs/ecorisk/tools.html

A – Eco-SSL for Avian Receptors: http://www.epa.gov/ecotox/ecossl/

D – Entry is lower of current VROM Environmental Quality standards or the updated RIVM Environmental Risk Limits. See #1 above for sources. 
Screening Quick Reference Table for PCB Composit

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

Tr - Individual congeners are at trace levels - 0.05 to 0.5% each - and are not included in totals. # - Refers to IUPAC congener number. IUPAC #s 107, 108, 109, 199, 200, 201 correspond to BZ#s 

108, 109, 107, 201, 199, and 200, respectively.

a – Biphenyl figures are not reflected in congener weight percentages.b – The six most prominent peaks listed by IUPAC congener number.c – In the 118 peak numbering system, peak 1 is biphenyl. d – This ratio is often used as an indicator for Aroclor 1260. 

e – This ratio is often used as an indicator for Aroclor 1248.f – Congener 153 is persistent in biota and abundantly present in higher chlo

modification estimate for biotic samples (increasing modification with de

100*

153#

153#153#

153



  

sample

theory sample PD

For more information, email SQuiRT@NOAA.gov Pg 28 

Degree of Chlorination A1221 Wt % A1232 Wt % A1016 Wt % A1242 Wt % A1248 Wt % A1254 Wt % Biphenyl 11.7 a 6.2 a∑1 Cl 65.5 31.3 Tr (#1, 3) Tr (#1, 3) ∑2 Cl 30.0 26.1 15.2 11.5 Tr (#7, 8) ∑3 Cl 3.5 21.7 58.2 51.0 21.8 2.1 ∑4 Cl Tr 15.0 26.5 29.0 60.2 14.3 Tr ∑5 Cl Tr (#95) 5.8 Tr (#91, 95, 102) 8.5 17.1 53.2 ∑6 Cl Tr (#136, 138) 0.8 26.6 ∑7 Cl Tr 3.8 ∑8 Cl Tr (#202) ∑9 Cl Total 99.1% 99.94% 99.95% 100% 99.93% 99.95% Prominent congeners b 1 3 8 4 15 6 1 8 3 4 15 28 18 28 8 31 33 16 18 28 31 8 33 16 66 70 64 28 52 60 118 110 101 95 138 153 180 138 Unique congener #11 Tr #137 Peak Range c 1-48 1-74 2-50 2-82 8-106 8-107 Ratio #118:203 d Neither No #203 Neither No #203 73 370 - 1230 Ratio #31:118 e No #118 4.3 No #118 8.5 - 9.2 2.1 0.01 – 0.04 Wt % of #153 f 0.1 - 0.14 Tr - 0.52 4.7-6.1 Additional Information ~ 1:1 mix of 1221-1242 Distillation of 1242 

Notes Commercial PCBs were manufactured by chlorination of biphenyl to produce complex mixtures (Aroclors in the USA and Great Britain, Clophens in Germany, or Kanechlors in Japanspecies (congeners) and a specified weight percent of chlorine (for example, 54% in Aroclor 1254). There are 209 distinct congener structures possible, of which about 140 to 150 ha

commercial PCBs. Congener distributions in environmental samples roughly resemble those of the parent commercial mixtures, but are often modified due to evaporation, water extraction, microbial ox

dechlorination or differential biological uptake and metabolism. Compositional modification from original Aroclor patterns increases in biotic samples with trophic level. Still, it is often uparent mixture released. The following information is presented to provide assistance with initial, preliminary evaluation of Aroclor. Aroclor assignment should be conducted only by q

Total PCBs can be characterized by two primary methods – the sum of congeners, or, the sum of estimates of individual Aroclor concentrations. In lower trophic level samples, these estimates of total PCBs. At higher trophic levels, analyses of samples tend to overestimate total PCBs by as much as 2-fold using the sum of Aroclor method, due to an overestimatio
Screening Quick Reference Table for Toxic Equivalency Factors 

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or clean-up levels. 

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data become available.

For more information, email SQuiRT@NOAA.gov Pg 29 OR&R Report 08-1 

Compound 2005 Mammals / human TEF 1998 Fish TEF 1998 Avian TEF

CHLORINATED DIBENZO-P-DIOXINS

2,3,7,8-TCDD 1 1 1

1,2,3,7,8-PeCDD 1 1 1

1,2,3,4,7,8-HxCDD 0.1 0.5 0.05

1,2,3,6,7,8-HxCDD 0.1 0.01 0.01

1,2,3,7,8,9-HxCDD 0.1 0.01 0.1

1,2,3,4,6,7,8-HpCDD 0.01 0.001 <0.001

OCDD 0.0003 <0.0001 < 0.0001

CHLORINATED DIBENZOFURANS

2,3,7,8-TCDF 0.1 0.05 1

1,2,3,7,8-PeCDF 0.03 0.05 0.1

2,3,4,7,8-PeCDF 0.3 0.5 1

1,2,3,4,7,8-HxCDF 0.1 0.1 0.1

1,2,3,6,7,8-HxCDF 0.1 0.1 0.1

1,2,3,7,8,9-HxCDF 0.1 0.1 0.1

2,3,4,6,7,8-HxCDF 0.1 0.1 0.1

1,2,3,4,6,7,8-HpCDF 0.01 0.01 0.01

1,2,3,4,7,8,9-HpCDF 0.01 0.01 0.01

OCDF 0.0003 <0.0001 0.0001

NON-ORTHO-SUBSTITUTED PCBS

3,3#,4,4#-tetraCB (PCB 77) 0.0001 0.0001 0.05

3,4,4#,5-tetraCB (PCB 81) 0.0003 0.0005 0.1

3,3#,4,4#,5-pentaCB (PCB 126) 0.1 0.005 0.1

3,3#,4,4#,5,5#-hexaCB (PCB 169) 0.03 0.00005 0.001

MONO-ORTHO-SUBSTITUTED PCBs

2,3,3#, 4,4#-pentaCB (PCB 105) 0.00003 <0.000005 0.0001

2,3,4,4#,5-pentaCB (PCB 114) 0.00003 <0.000005 0.0001

2,3#,4,4#,5-pentaCB (PCB 118) 0.00003 <0.000005 0.00001

2# ,3,4,4# ,5-pentaCB (PCB 123) 0.00003 <0.000005 0.00001

2,3,3#, 4,4#,5-hexaCB (PCB 156) 0.00003 <0.000005 0.0001

2,3,3#,4,4#,5#-hexaCB (PCB 157) 0.00003 <0.000005 0.0001

2,3#,4,4#,5,5#-hexaCB (PCB 167) 0.00003 <0.000005 0.00001

2,3,3#, 4,4#, 5,5#-heptaCB (PCB 189) 0.00003 <0.000005 0.00001

It has been well established that 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), and other 

chlorinated dioxins, furans, and even PCBs with a similar planar chemical structures 

are capable of inducing similar toxicity, such as carcinogenicity. Since these 

compounds generally are observed in mixtures, it is desirable to be able to express the 

cumulative, overall toxicity of the mixture. However, since each of these congeners 

does not exhibit the same degree, or potency, of toxicity, some manipulations of raw 

concentrations are required to express total toxicity.

A number of systems have been developed to express the total, overall toxicity from 

mixtures of these chemicals. Most commonly, the potency of each congener is 

weighted relative to a standard, generally the most potent congener. For dioxins and 

furans, 2,3,7,8-TCDD is the common standard which is given a reference value of one. 

The weighting, or potency factor, is called a Toxic Equivalency Factor (TEF). When 

cumulative results are reported, the absolute concentration of each congener is 

multiplied by its corresponding TEF to derive a TCDD-equivalency. These values are 

then summed together to give a total Toxic Equivalency Quotient, or TEQ.

The TEQ scheme refers only to adverse effects (e.g., cancer) following interactions 

with certain cellular enzyme systems (the Ah receptors). Other toxic effects of dioxins 

and dioxin-like compounds are not quantified by this method. Because they involve 

potency to specific enzyme systems, TEF values vary for different animal species. 

There are two main schemes:

The two most common systems for determining TEQs are: 

1) I-TEF and I-TEQ: The older International Toxic Equivalent (I-TEQ) scheme by the 

North Atlantic Treaty Organization (NATO) initially set up in 1989 and later 

extended and updated. 

2) WHO-TEF and WHO-TEQ (also referred to as TEF or TEQ): More recently, the 

World Health Organization (WHO) suggested modified Toxic Equivalency Factor 

(TEF) values for human risk assessment. 

ITEQs are most common in North America, while Asia and Europe tend to use WHOTEQs. On average, the result of TEQ-calculations is about 10% higher when I-TEFs 

are used compared to when WHO-TEFs are used.

Potency in fish reflects mainly rainbow trout: potency for birds is mainly derived from 

chickens.

Sources

Van den Berg, M., and others. 1998. “Toxic Equivalency Factors (TEFs) for PCBs, 

PCDDs, and PCDFs for Humans and Wildlife.” Environmental Health Perspectives. 

Volume 106. Pages 775 - 792. 

Van den Berg, M., and others. 2006. “The 2005 World Health Organization Reevaluation of Human and Mammalian Toxic Equivalency Factors for Dioxins and 

Dioxin-like Compounds.” Toxicological Sciences 93(2):223-241.
Screening Quick Reference Tables for Composition by 

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or 

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data 

Carbon ranges are approximate: actual carbon ranges for a specific product are dependent upon the distillation process of thAnalytic Methods generally refer to EPA SW-846 methods (www.epa.gov/SW-846/index.htm) 

For more information, email SQuiRT@NOAA.gov Pg 30 
Screening Quick Reference Tables for Sample Colle

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1 2 3 

P - Polyethylene; G - Amber glass containers; TLC - Teflon-lined cap; VOA - Volatile organic analyte vial of amber glass with teflon-lined septum. Adjust to pH <2 with H

2SO

4, HCI, or solid NaHSO

4

Free chlorine must be removed before addition of HCI by exact addition of Na

2S2O

3

For more information, email SQuiRT@NOAA.gov Pg 31 

MATERIAL CONTAINER PRESERVATION MAXIMUM HOLDING TIME INORGANICSChromium+6 (Cr+6) P,G Cool, 4oC 24 hours Mercury (Hg) P,G HNO

3, to pH <2 28 days 

Metals, except Cr+6 and Hg P,G HNO

3, to pH <2 6 months 

Cyanide by method no. 9010 P,G Cool 4oC, pH >12 See method 9010 14 days Alpha, Beta, and Radium Radiation P,G HNO3 to pH <2 6 months ORGANICS Benzidines G, TLC Cool, 4oC 7 days until extraction, 40 days after extraction Chlorinated Hydrocarbons G, TLC Cool, 4oC

3 7 days until extraction, 40 days after extraction 

Dioxins and Furans G, TLC Cool, 4oC

3 30 days until extraction, 45 days after extraction 

Haloethers G, TLC Cool, 4oC

3 7 days until extraction, 40 days after extraction 

Nitrites G, TLC Cool, 4oC

3 14 days 

Nitrosamines G, TLC Cool, 4oC

3 7 days until extraction, 40 days after extraction 

Nitroaromatics and Cyclic Ketones G, TLC Cool, 4oC

3 7 days until extraction, 40 days after extraction 

OIL And GREASE G Cool, 4oC

2 28 days 

TOTAL Organic Carbon, By Method No. 9060 P,G Cool, 4oC

2 store in the dark 28 days 

TOTAL Organic Halides By Method No. 9020/9021 G, TLC Cool, 4oC

2 28 days 

PCBs G, TLC Cool, 4oC 7 days until extraction, 40 days after extraction Pesticides G, TLC Cool 4oC, 7 days until extraction, 40 days after extraction Phenols G, TLC Cool, 4oC

3 7 days until extraction, 40 days after extraction 

Phthalate Esters G, TLC Cool, 4oC 7 days until extraction, 40 days after extraction Polynuclear Aromatic Hydrocarbons G, TLC Cool, 4oC

3 store in the dark 7 days until extraction, 40 days after extraction 

Purgeable Aromatic Hydrocarbons VOA Cool, 4oC2,3 14 days Purgeable Halocarbons VOA Cool, 4oC

3 14 days 

Sources EPA SW846 
Screening Quick Reference Table 

Options for Selection of Analytical Methods: InorgaThese tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1 2 3 

Method 6200 is Portable X-Ray; 6800 is Elemental/Isotope Mass Spec.; 4500 is Immunoassay; 7063 is ASV; where available, soil detection limits in ppm are in parentheses. Except as noted, most individual procedures are proposed to be integrated into Method 7000B or 7010. Includes various methods. Follow the extraction procedure detailed in the individual determinative method. 

For more information, email SQuiRT@NOAA.gov Pg 32 

EXTRA

TRACE ELEMENT OTHER 1 FLAME AA FURNANCE AA ICP 

WATER 

Aluminum (Al) 6800 7020 6010B 6020A 3005A 3010A 3015A Antimony (Sb) 6200(55) 6800 7040 7041 7062 3 6010B 6020A 3005A 3015A Arsenic (As) 6200(60) 7063 7061A 3 7060 7062 3 6010B 6020A 3005A 3010A 3015A 7063 Barium (Ba) 6200(60) 6800 7080A 7081 3 6010B 6020A 3005A 3010A 3015A Beryllium (Be) 7090 7091 6010B 6020A 3005A 3010A 3015A 3020A Cadmium (Cd) 6200 6800 7130 7131A 6010B 6020A 3005A 3010A 3015A 3020A Calcium (Ca) 6200 6800 7140 6010B 6020A 3005A 3010A 3015A Chromium (CR), total 6200(200) 6800 7190 7191 6010B 6020A 3005A 3010A 3015A 3020A Chromium+6 (Cr+6) 7195 — 7199 3 7195 - 7199 Cobalt (Co) 6200(330) 7200 7201 6010B 6020A 3005A 3010A 3015A 3020A Copper (Cu) 6200(85) 6800 7210 7211 3 6010B 6020A 3005A 3010A 3015A Iron (Fe) 6200 6 800 7380 7381 3 6010B 6020A 3005A 3010A 3015A Lead (Pb) 6200(45) 6800 7420 7421 6010B 6020A 3005A 3010A 3015A 3020A Magnesium (Mg) 6800 7450 6010B 6020A 3005A 3010A 3015A Manganese (Mn) 6200(240) 7460 7461 6010B 6020A 3005A 3010A 3015A Mercury (Hg) 4500(0.5) 6200 6800 7470A 7471B 7472 7473 7474 3 6020A 7470A 7472 3015A Molybdenum (Mo) 6200(25) 6800 7480 7481 6010B 3005A 3010A 3015A 3020A Nickel (Ni) 6200(100) 6800 7520 7521 6010B 6020A 3005A 3010A 3015A Potassium (K) 6200 6800 7610 6010B 6020A 3005A 3010A 3015A Selenium (Se) 6200 6800 7741A 7742 3 7740 6010B 6020A 3005A 3010A 3015A Silver (Ag) 6200 6800 7760A 7761 3 6010B 6020A 3005A 3015A Sodium (Na) 7770 6010B 6020A 3005A 3010A 3015A Strontium (Sr) 6200(30) 6800 7780 6010B 3015A Thallium (Tl) 6200 6800 7840 7841 6010B 6020A 3005A 3010A 3015A 3020A Tin (Sn) 6200(85) 7870 Vanadium (V) 6200 6800 7910 7911 6010B 6020A 3005A 3010A 3015A 3020A Zinc (Zn) 6200(80) 6800 7950 7951 3 6010B 6020A 3005A 3010A 3015A Cyanide (HCN) 9010B — 9014 3

Sources All method numbers refer to EPA SW-846, Volume III with changes as proposed for Volume IV. ICP’s advantage is that it allows simultaneous or rapid sequential determination of many elements, but suffers from interferences. AA determinations are normally completed as singcomparable detection limits (within a factor of 4), but ICP-MS (6020A) can drastically improve the detection limits (e.g., an order of magnitude lower). Furnace AA generally exhibits loffers more control over unwanted matrix components. X-RAY and immunoassays allow field determinations. 
Screening Quick Reference Table 

Options for Selection of Analytical Methods: OrganiThese tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

1 2 

Series 4000 are immunoassays and are for specific compounds within these classes (i.e., 2,4-D, TNT, RDX, and PCP). Soil detection limits are in parentheses. This is not a method of choice, but rather a confirmatory method. 

For more information, email SQuiRT@NOAA.gov Pg 33 

FIELD OC/MS HPLC EXTRACTION METHODS 

COMPOUNDS 

METHODS METHOD

SPECIFIC 

DETECTION 

METHOD METHOD WATER SOIL/SEDIM

Aromatic and Halogenated Volatiles 8260B 8021B 5021 5030B 5032 5021 5032 50Carbamates 8318 8321B 8318 8321B 8318 8321B Chlorinated Dioxins and Furans 8280B 8290A 8280B 8290A 8280B 8290A 3Chlorinated Hydrocarbons 8270D 8121 3510C 3520C 3535A 3540C 3550Chlorinated Phenoxyacids 4015 (0.1 ppm) 8270D 2 8151A 8321B 8151A 8321B 3535A 8321B 8151A 3545A Haloethers 8270D 8111 3510C 3520C 3540C 3545 35Nitriles and Amides 8260B 8031 8032A 8033 8315 8316 5030B — 5032 8031 8032A 8316 5031 5032 50Nitroaromatics and Ketones 8270D 8091 8330A 3510C 3520C 3535A 3540C 3545 35Nitroaromatics (Explosives) 4050 (0.5 ppm) 4051 8515 (1 ppm) 8330A - 8332 8330A — 8332 8330A — 833Nitrosamines 8270D 8070A 3510C 3520C 8070A 3540C 3545 3550B Non-Halogenated Volatiles 8260B 8015B 5030B — 5032 5021 5031 5032 Organochlorines 4040 — 4042 (0.2 to 20 ppm) 8270D 2 8081B 8275A 3510C 3520C 3535A 3540C 3545A 3550Organophosphates 8270D 2 8141B 8321B 3510C 3520C 3535A 3540C 3545A 3PAHs 4035 (1 ppm) 8270D 8100 8275A 8310 3510C 3520C 3540C 3545 3550PCBs 4020 (5 ppm) 9078 (2 ppm) 8270D 2 8082A 8275A 3510C 3520C 3535A 3540C 3545A 3550B 3Phenolics 4010A (0.5 ppm) 8270D 8041 3510C 3520C 3540C 3545 35Phthalates 8270D 8061A 3510C 3520C 3535A 3540C 3545 35Semi-Volatile Organics 8270D 3510C 3520C 3535A 3540C 3545A 3Total Organic Halides (TOX) 9020B 9022 9020B 9022 Total Petroleum Hydrocarbons 4030 (5 ppm) 9074 8015B Volatile Organics 8260B 8015B 8021B 5030B — 5032 5021 5031 5032 

Sources All method numbers refer to EPA SW-846, Update III, with changes as proposed in Update IV. Options shown are generally for chemical classes; more detailed information may be available for specific compounds 

GC/MS methods allow for scanning a broad range of volatile and semi-volatile compounds, but suffer from interference and higher detection limits. Specific determination methods and HPLC methods allow for more precise determinations of specific compounds of interest. 
Screening Quick Reference Tables 

These tables were developed for screening purposes only: they do not represent official NOAA policy and do not constitute criteria or c

All attempts have been made to ensure accuracy; however, NOAA is not liable for errors. Values are subject to changes as new data b

Because trace elements are naturally occurring compounds, concentrations reflective of non-anthropogenically impacted, or “background,” are provided in addition to toxicological benchmarks. For screening, trace element levels may be compared to the geometric mean (and range) observed in natural soils in the U.S. Further comparisons to regional values is encouraged. Promulgated criteria or standards for sediments or soils are generally not available in the U.S. For screening purposes, contaminant levels in solids (sediment or soil) may be compared to benchmarks representative of different characterizations of ecological risk. They should not be applied without a 

reasonable understanding of their development, their performance, and their limitations. The NOAA SQuiRTs include multiple sediment screening values to help portray a spectrum of concentrations which have been associated with various probabilities of adverse biological effects. This spectrum ranges from presumably nearly non-toxic to toxic levels. For instance, if all analytes screen below lower-threshold values (for example, TELs), this suggests, with a high degree of confidence, that a sample with these levels of contaminants has a low probability of being toxic, as tested through standard bioassays. Conversely, 

exceeding lower thresholds does not necessarily predict toxicity. Comparison to higher toxicity thresholds (for example, PELs) identifies compounds which are more probably present at elevated, toxic levels. Sources of benchmarks for sediment were chosen primarily on the basis of representing a fairly unique approach for their derivation. A major exception is the “Consensus TEC/PEC” values: these values are simply averages of other existing benchmarks (mostly those appearing in the SQuiRT cards). The consensus TEC/PECs are provided here merely as a service. For soil- and sediment-associated contaminants, dry weight concentrations are screened directly against published benchmarks. Some benchmarks are available only on a Total Organic Carbon (TOC) normalized basis, and are footnoted as such. Separate values are provided for either freshwater and estuarine or marine sediments. For freshwater sediments, the Upper Effects Threshold (UET) was derived by NOAA as the lowest AET from a compilation of endpoint analogous to the 

marine AET endpoints. The UETs for organic for a sediment containing 1% TOC. This version of the SQuiRT cards adds a secA characterization of Aroclors by their degree patterns may aid in preliminary exploration of 

assignment should only be conducted by a quTo express cumulative toxicity from mixtures Equivalency Factors are included in this versconcentrations can be multiplied by the TEF pthen summed to derive total toxicity. Every effort has been made to ensure accuraHowever, NOAA is not liable for errors in orig

These screening values are subject to changThe SQuiRT cards may be freely reproduced distributed in their entirety, without modificatioThe SQuiRT cards should be cited as: 

 “Buchman, M. F., 2008. NOAA Screen

NOAA OR&R Report 08-1, Seattle WRestoriation Division, National OAdministration, 34 pages.”