Regional Screening Level Table (RSL) Master APRIL 2009 

SFO IUR RfDo RfCi Csat

Residential 

Soil

Industrial 

Soil

Residential 

Air

Industrial 

Air Tapwater 

(mg/kg-day)-1 (ug/m3)-1 (mg/kg-day) (mg/m3) mg/kg mg/kg mg/kg ug/m3 ug/m3 ug/L 

ALAR 1596-84-5 1.8E-02 C 5.1E-06 C 1.5E-01 I 1 0.1 2.7E+01 c 9.6E+01 c 4.8E-01 c 2.4E+00 c 3.7E+00 c Acephate 30560-19-1 8.7E-03 I 4.0E-03 I 1 0.1 5.6E+01 c** 2.0E+02 c* 7.7E+00 c* Acetaldehyde 75-07-0 2.2E-06 I 9.0E-03 I V 1 1.1E+05 1.1E+01 c** 5.3E+01 c** 1.1E+00 c** 5.6E+00 c** 2.2E+00 c** Acetochlor 34256-82-1 2.0E-02 I 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Acetone 67-64-1 9.0E-01 I 3.1E+01 A V 1 1.1E+05 6.1E+04 n 6.1E+05 nms 3.2E+04 n 1.4E+05 n 2.2E+04 n Acetone Cyanohydrin 75-86-5 3.0E-03 P 6.0E-02 P V 1 1.1E+05 2.0E+02 n 2.1E+03 n 6.3E+01 n 2.6E+02 n 5.8E+01 n Acetonitrile 75-05-8 6.0E-02 I V 1 1.3E+05 8.7E+02 n 3.7E+03 n 6.3E+01 n 2.6E+02 n 1.3E+02 n Acetophenone 98-86-2 1.0E-01 I V 1 2.3E+03 7.8E+03 ns 1.0E+05 nms 3.7E+03 n Acetylaminofluorene, 2- 53-96-3 3.8E+00 C 1.3E-03 C 1 0.1 1.3E-01 c 4.5E-01 c 1.9E-03 c 9.4E-03 c 1.8E-02 c Acrolein 107-02-8 5.0E-04 I 2.0E-05 I V 1 2.5E+04 1.6E-01 n 6.8E-01 n 2.1E-02 n 8.8E-02 n 4.2E-02 n Acrylamide 79-06-1 4.5E+00 I 1.3E-03 I 2.0E-04 I 1 0.1 1.1E-01 c 3.8E-01 c 1.9E-03 c 9.4E-03 c 1.5E-02 c Acrylic Acid 79-10-7 5.0E-01 I 1.0E-03 I 1 0.1 3.0E+04 n 2.9E+05 nm 1.0E+00 n 4.4E+00 n 1.8E+04 n Acrylonitrile 107-13-1 5.4E-01 I 6.8E-05 I 4.0E-02 A 2.0E-03 I V 1 1.1E+04 2.4E-01 c* 1.2E+00 c* 3.6E-02 c* 1.8E-01 c* 4.5E-02 c* Adiponitrile 111-69-3 6.0E-03 P 1 0.1 8.5E+06 nm 3.6E+07 nm 6.3E+00 n 2.6E+01 nAlachlor 15972-60-8 5.6E-02 C 1.0E-02 I 1 0.1 8.7E+00 c* 3.1E+01 c 1.2E+00 c Aldicarb 116-06-3 1.0E-03 I 1 0.1 6.1E+01 n 6.2E+02 n 3.7E+01 n Aldicarb Sulfone 1646-88-4 1.0E-03 I 1 0.1 6.1E+01 n 6.2E+02 n 3.7E+01 n Aldrin 309-00-2 1.7E+01 I 4.9E-03 I 3.0E-05 I 1 0.1 2.9E-02 c* 1.0E-01 c 5.0E-04 c 2.5E-03 c 4.0E-03 c Ally 74223-64-6 2.5E-01 I 1 0.1 1.5E+04 n 1.5E+05 nm 9.1E+03 n Allyl Alcohol 107-18-6 5.0E-03 I 3.0E-04 P 1 0.1 3.1E+02 n 3.1E+03 n 3.1E-01 n 1.3E+00 n 1.8E+02 n Allyl Chloride 107-05-1 2.1E-02 C 6.0E-06 C 1.0E-03 I V 1 1.5E+03 7.0E-01 c** 3.5E+00 c** 4.1E-01 c** 2.0E+00 c** 6.5E-01 c** Aluminum 7429-90-5 1.0E+00 P 5.0E-03 P 1 7.7E+04 n 9.9E+05 nm 5.2E+00 n 2.2E+01 n 3.7E+04 n Aluminum Phosphide 20859-73-8 4.0E-04 I 1 3.1E+01 n 4.1E+02 n 1.5E+01 nAmdro 67485-29-4 3.0E-04 I 1 0.1 1.8E+01 n 1.8E+02 n 1.1E+01 n Ametryn 834-12-8 9.0E-03 I 1 0.1 5.5E+02 n 5.5E+03 n 3.3E+02 n Aminobiphenyl, 4- 92-67-1 2.1E+01 C 6.0E-03 C 1 0.1 2.3E-02 c 8.2E-02 c 4.1E-04 c 2.0E-03 c 3.2E-03 c Aminophenol, m- 591-27-5 8.0E-02 P 1 0.1 4.9E+03 n 4.9E+04 n 2.9E+03 n Aminophenol, p- 123-30-8 2.0E-02 P 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Amitraz 33089-61-1 2.5E-03 I 1 0.1 1.5E+02 n 1.5E+03 n 9.1E+01 n Ammonia 7664-41-7 1.0E-01 I 1 1.0E+02 n 4.4E+02 nAmmonium Perchlorate 7790-98-9 7.0E-04 I 1 5.5E+01 n 7.2E+02 n 2.6E+01 nAmmonium Sulfamate 7773-06-0 2.0E-01 I 1 1.6E+04 n 2.0E+05 nm 7.3E+03 nAniline 62-53-3 5.7E-03 I 1.6E-06 C 7.0E-03 P 1.0E-03 I 1 0.1 8.5E+01 c** 3.0E+02 c* 1.0E+00 n 4.4E+00 n 1.2E+01 c* Antimony (metallic) 7440-36-0 4.0E-04 I 0.15 3.1E+01 n 4.1E+02 n 1.5E+01 n Antimony Pentoxide 1314-60-9 5.0E-04 H 0.15 3.9E+01 n 5.1E+02 n 1.8E+01 nAntimony Potassium Tartrate 11071-15-1 9.0E-04 H 0.15 7.0E+01 n 9.2E+02 n 3.3E+01 nAntimony Tetroxide 1332-81-6 4.0E-04 H 0.15 3.1E+01 n 4.1E+02 n 1.5E+01 nAntimony Trioxide 1309-64-4 2.0E-04 I 0.15 2.8E+05 nm 1.2E+06 nm 2.1E-01 n 8.8E-01 nApollo 74115-24-5 1.3E-02 I 1 0.1 7.9E+02 n 8.0E+03 n 4.7E+02 n Aramite 140-57-8 2.5E-02 I 7.1E-06 I 5.0E-02 H 1 0.1 1.9E+01 c 6.9E+01 c 3.4E-01 c 1.7E+00 c 2.7E+00 c Arsenic, Inorganic 7440-38-2 1.5E+00 I 4.3E-03 I 3.0E-04 I 1.5E-05 C 1 0.03 3.9E-01 c* 1.6E+00 c 5.7E-04 c* 2.9E-03 c* 4.5E-02 c Arsine 7784-42-1 5.0E-05 I 1 7.1E+04 n 3.0E+05 nm 5.2E-02 n 2.2E-01 nAssure 76578-14-8 9.0E-03 I 1 0.1 5.5E+02 n 5.5E+03 n 3.3E+02 n Asulam 3337-71-1 5.0E-02 I 1 0.1 3.1E+03 n 3.1E+04 n 1.8E+03 n Atrazine 1912-24-9 2.3E-01 C 3.5E-02 I 1 0.1 2.1E+00 c 7.5E+00 c 2.9E-01 c Avermectin B1 65195-55-3 4.0E-04 I 1 0.1 2.4E+01 n 2.5E+02 n 1.5E+01 n Azobenzene 103-33-3 1.1E-01 I 3.1E-05 I V 1 4.9E+00 c 2.2E+01 c 7.8E-02 c 4.0E-01 c 1.2E-01 c Barium 7440-39-3 2.0E-01 I 5.0E-04 H 0.07 1.5E+04 n 1.9E+05 nm 5.2E-01 n 2.2E+00 n 7.3E+03 n Baygon 114-26-1 4.0E-03 I 1 0.1 2.4E+02 n 2.5E+03 n 1.5E+02 n Bayleton 43121-43-3 3.0E-02 I 1 0.1 1.8E+03 n 1.8E+04 n 1.1E+03 n Baythroid 68359-37-5 2.5E-02 I 1 0.1 1.5E+03 n 1.5E+04 n 9.1E+02 n Benefin 1861-40-1 3.0E-01 I 1 0.1 1.8E+04 n 1.8E+05 nm 1.1E+04 n Benomyl 17804-35-2 5.0E-02 I 1 0.1 3.1E+03 n 3.1E+04 n 1.8E+03 n Bentazon 25057-89-0 3.0E-02 I 1 0.1 1.8E+03 n 1.8E+04 n 1.1E+03 n Benzaldehyde 100-52-7 1.0E-01 I V 1 1.9E+03 7.8E+03 ns 1.0E+05 nms 3.7E+03 n Benzene 71-43-2 5.5E-02 I 7.8E-06 I 4.0E-03 I 3.0E-02 I V 1 2.0E+03 1.1E+00 c* 5.6E+00 c* 3.1E-01 c 1.6E+00 c* 4.1E-01 c Benzenethiol 108-98-5 1.0E-05 H V 1 1.4E+03 7.8E-01 n 1.0E+01 n 3.7E-01 n Benzidine 92-87-5 2.3E+02 I 6.7E-02 I 3.0E-03 I M 1 0.1 5.0E-04 c 7.5E-03 c 1.4E-05 c 1.8E-04 c 9.4E-05 c Benzoic Acid 65-85-0 4.0E+00 I 1 0.1 2.4E+05 nm 2.5E+06 nm 1.5E+05 n Benzotrichloride 98-07-7 1.3E+01 I V 1 1.6E+02 4.9E-02 c 2.2E-01 c 5.2E-03 c Benzyl Alcohol 100-51-6 5.0E-01 P 1 0.1 3.1E+04 n 3.1E+05 nm 1.8E+04 n Benzyl Chloride 100-44-7 1.7E-01 I 4.9E-05 C 2.0E-03 P 1.0E-03 P V 1 6.4E+01 1.1E+00 c* 5.1E+00 c* 5.0E-02 c* 2.5E-01 c* 7.9E-02 c* Beryllium and compounds 7440-41-7 2.4E-03 I 2.0E-03 I 2.0E-05 I 0.007 1.6E+02 n 2.0E+03 n 1.0E-03 c* 5.1E-03 c* 7.3E+01 n Bidrin 141-66-2 1.0E-04 I 1 0.1 6.1E+00 n 6.2E+01 n 3.7E+00 n Bifenox 42576-02-3 9.0E-03 P 1 0.1 5.5E+02 n 5.5E+03 n 3.3E+02 n Biphenthrin 82657-04-3 1.5E-02 I 1 0.1 9.2E+02 n 9.2E+03 n 5.5E+02 n Biphenyl, 1,1'- 92-52-4 5.0E-02 I V 1 2.6E+02 3.9E+03 ns 5.1E+04 ns 1.8E+03 n Bis(2-chloro-1-methylethyl) ether 108-60-1 7.0E-02 H 1.0E-05 H 4.0E-02 I V 1 5.7E+02 3.5E+00 c 1.7E+01 c 2.4E-01 c 1.2E+00 c 3.2E-01 c Bis(2-chloroethoxy)methane 111-91-1 3.0E-03 P 1 0.1 1.8E+02 n 1.8E+03 n 1.1E+02 n Bis(2-chloroethyl)ether 111-44-4 1.1E+00 I 3.3E-04 I V 1 3.3E+03 1.9E-01 c 9.0E-01 c 7.4E-03 c 3.7E-02 c 1.2E-02 c Bis(2-ethylhexyl)phthalate 117-81-7 1.4E-02 I 2.4E-06 C 2.0E-02 I 1 0.1 3.5E+01 c* 1.2E+02 c 1.0E+00 c 5.1E+00 c 4.8E+00 c Bis(chloromethyl)ether 542-88-1 2.2E+02 I 6.2E-02 I V 1 2.8E+03 2.7E-04 c 1.3E-03 c 3.9E-05 c 2.0E-04 c 6.2E-05 c Bisphenol A 80-05-7 5.0E-02 I 1 0.1 3.1E+03 n 3.1E+04 n 1.8E+03 n Boron And Borates Only 7440-42-8 2.0E-01 I 2.0E-02 H 1 1.6E+04 n 2.0E+05 nm 2.1E+01 n 8.8E+01 n 7.3E+03 n Boron Trifluoride 7637-07-2 7.0E-04 H 1 9.9E+05 nm 4.2E+06 nm 7.3E-01 n 3.1E+00 nBromate 15541-45-4 7.0E-01 I 4.0E-03 I 1 9.1E-01 c 4.1E+00 c 9.6E-02 c Bromobenzene 108-86-1 2.0E-02 P 1.0E-02 P V 1 7.7E+02 9.4E+01 n 4.1E+02 n 1.0E+01 n 4.4E+01 n 2.0E+01 n 

Key: I = IRIS; P = PPRTV; A = ATSDR; C = Cal EPA; H = HEAST; W = WHO; S = see user guide Section 5; L = see user guide on lead; M = mutagen; V = volatile; F = See FAQ #28; c = cancer; * = where: n SL < 100X c SL; ** = where n SL < 10X c SL; 

(See User's Guide); s = Concentration may exceed Csat (See User's Guide); SSL values are bsed on DAF=1

Contaminant Toxicity and Chemical-specific Information Screening Levels 

Analyte CAS No.

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Page 1 of 9
Regional Screening Level Table (RSL) Master APRIL 2009 

SFO IUR RfDo RfCi Csat

Residential 

Soil

Industrial 

Soil

Residential 

Air

Industrial 

Air Tapwater 

(mg/kg-day)-1 (ug/m3)-1 (mg/kg-day) (mg/m3) mg/kg mg/kg mg/kg ug/m3 ug/m3 ug/L 

Key: I = IRIS; P = PPRTV; A = ATSDR; C = Cal EPA; H = HEAST; W = WHO; S = see user guide Section 5; L = see user guide on lead; M = mutagen; V = volatile; F = See FAQ #28; c = cancer; * = where: n SL < 100X c SL; ** = where n SL < 10X c SL; 

(See User's Guide); s = Concentration may exceed Csat (See User's Guide); SSL values are bsed on DAF=1

Contaminant Toxicity and Chemical-specific Information Screening Levels 

Analyte CAS No.

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mutagen key key key GIABS ABS key key

Bromodichloromethane 75-27-4 6.2E-02 I 3.7E-05 C 2.0E-02 I V 1 9.9E+02 2.8E-01 c 1.4E+00 c 6.6E-02 c 3.3E-01 c 1.2E-01 c Bromoform 75-25-2 7.9E-03 I 1.1E-06 I 2.0E-02 I 1 0.1 6.1E+01 c* 2.2E+02 c* 2.2E+00 c 1.1E+01 c 8.5E+00 c* Bromomethane 74-83-9 1.4E-03 I 5.0E-03 I V 1 3.6E+03 7.9E+00 n 3.5E+01 n 5.2E+00 n 2.2E+01 n 8.7E+00 n Bromophos 2104-96-3 5.0E-03 H 1 0.1 3.1E+02 n 3.1E+03 n 1.8E+02 n Bromoxynil 1689-84-5 2.0E-02 I 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Bromoxynil Octanoate 1689-99-2 2.0E-02 I 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Butadiene, 1,3- 106-99-0 3.4E+00 C 3.0E-05 I 2.0E-03 I V 1 6.9E+02 5.4E-02 c* 2.6E-01 c* 8.1E-02 c* 4.1E-01 c* 1.8E-02 c Butanol, N- 71-36-3 1.0E-01 I 1 0.1 6.1E+03 n 6.2E+04 n 3.7E+03 n Butyl Benzyl Phthlate 85-68-7 1.9E-03 P 2.0E-01 I 1 0.1 2.6E+02 c* 9.1E+02 c 3.5E+01 c Butyl alcohol, sec- 78-92-2 2.0E+00 P 3.0E+01 P 1.6E+05 nm 2.0E+06 nm 3.1E+04 n 1.3E+05 n 7.3E+04 nButylate 2008-41-5 5.0E-02 I 1 0.1 3.1E+03 n 3.1E+04 n 1.8E+03 n Butylphthalyl Butylglycolate 85-70-1 1.0E+00 I 1 0.1 6.1E+04 n 6.2E+05 nm 3.7E+04 n Cacodylic Acid 75-60-5 2.0E-02 A 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 nCadmium (Diet) 7440-43-9 4.2E-03 C 1.0E-03 I 1.0E-05 A 0.025 0.001 7.0E+01 n 8.0E+02 nCadmium (Water) 7440-43-9 1.8E-03 I 5.0E-04 I 1.0E-05 A 0.05 0.001 1.4E-03 c** 6.8E-03 c** 1.8E+01 n Caprolactam 105-60-2 5.0E-01 I 1 0.1 3.1E+04 n 3.1E+05 nm 1.8E+04 n Captafol 2425-06-1 1.5E-01 C 4.3E-05 C 2.0E-03 I 1 0.1 3.2E+00 c* 1.1E+01 c 5.7E-02 c 2.9E-01 c 4.5E-01 c Captan 133-06-2 2.3E-03 C 6.6E-07 C 1.3E-01 I 1 0.1 2.1E+02 c* 7.5E+02 c 3.7E+00 c 1.9E+01 c 2.9E+01 c Carbaryl 63-25-2 1.0E-01 I 1 0.1 6.1E+03 n 6.2E+04 n 3.7E+03 n Carbofuran 1563-66-2 5.0E-03 I 1 0.1 3.1E+02 n 3.1E+03 n 1.8E+02 n Carbon Disulfide 75-15-0 1.0E-01 I 7.0E-01 I V 1 2.6E+02 6.7E+02 ns 3.0E+03 ns 7.3E+02 n 3.1E+03 n 1.0E+03 n Carbon Tetrachloride 56-23-5 1.3E-01 I 1.5E-05 I 7.0E-04 I 1.9E-01 A V 1 4.8E+02 2.5E-01 c 1.3E+00 c 1.6E-01 c 8.2E-01 c 2.0E-01 c Carbosulfan 55285-14-8 1.0E-02 I 1 0.1 6.1E+02 n 6.2E+03 n 3.7E+02 n Carboxin 5234-68-4 1.0E-01 I 1 0.1 6.1E+03 n 6.2E+04 n 3.7E+03 n Chloral Hydrate 302-17-0 1.0E-01 I 1 0.1 6.1E+03 n 6.2E+04 n 3.7E+03 n Chloramben 133-90-4 1.5E-02 I 1 0.1 9.2E+02 n 9.2E+03 n 5.5E+02 n Chloranil 118-75-2 4.0E-01 H 1 0.1 1.2E+00 c 4.3E+00 c 1.7E-01 c Chlordane 12789-03-6 3.5E-01 I 1.0E-04 I 5.0E-04 I 7.0E-04 I 1 0.04 1.6E+00 c* 6.5E+00 c* 2.4E-02 c* 1.2E-01 c* 1.9E-01 c* Chlordecone (Kepone) 143-50-0 1.6E+01 C 4.6E-03 C 5.0E-04 A 1 0.1 3.0E-02 c 1.1E-01 c 5.3E-04 c 2.7E-03 c 4.2E-03 c Chlorfenvinphos 470-90-6 7.0E-04 A 1 0.1 4.3E+01 n 4.3E+02 n 2.6E+01 n Chlorimuron, Ethyl- 90982-32-4 2.0E-02 I 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Chlorine 7782-50-5 1.0E-01 I 1.5E-04 A 1 7.5E+03 n 9.1E+04 n 1.5E-01 n 6.4E-01 n 3.7E+03 n Chlorine Dioxide 10049-04-4 3.0E-02 I 2.0E-04 I 1 2.3E+03 n 3.0E+04 n 2.1E-01 n 8.8E-01 n 1.1E+03 nChlorite (Sodium Salt) 7758-19-2 3.0E-02 I 1 2.3E+03 n 3.1E+04 n 1.1E+03 nChloro-1,1-difluoroethane, 1- 75-68-3 5.0E+01 I V 1 1.2E+03 5.9E+04 ns 2.5E+05 nms 5.2E+04 n 2.2E+05 n 1.0E+05 n Chloro-1,3-butadiene, 2- 126-99-8 2.0E-02 H 7.0E-03 H V 1 8.2E+02 8.6E+00 n 3.6E+01 n 7.3E+00 n 3.1E+01 n 1.4E+01 n Chloro-2-methylaniline HCl, 4- 3165-93-3 4.6E-01 H 1 0.1 1.1E+00 c 3.7E+00 c 1.5E-01 c Chloro-2-methylaniline, 4- 95-69-2 2.7E-01 C 7.7E-05 C 1 0.1 1.8E+00 c 6.4E+00 c 3.2E-02 c 1.6E-01 c 2.5E-01 c Chloroacetic Acid 79-11-8 2.0E-03 H 1 0.1 1.2E+02 n 1.2E+03 n 7.3E+01 n Chloroacetophenone, 2- 532-27-4 3.0E-05 I 1 0.1 4.3E+04 n 1.8E+05 nm 3.1E-02 n 1.3E-01 nChloroaniline, p- 106-47-8 2.0E-01 P 4.0E-03 I 1 0.1 2.4E+00 c 8.6E+00 c 3.4E-01 c Chlorobenzene 108-90-7 2.0E-02 I 5.0E-02 P V 1 8.6E+02 3.1E+02 n 1.5E+03 ns 5.2E+01 n 2.2E+02 n 9.1E+01 n Chlorobenzilate 510-15-6 1.1E-01 C 3.1E-05 C 2.0E-02 I 1 0.1 4.4E+00 c 1.6E+01 c 7.8E-02 c 4.0E-01 c 6.1E-01 c Chlorobenzotrifluoride, 4- 98-56-6 3.0E-03 P 3.0E-01 P V 1 5.5E+02 2.1E+02 n 2.4E+03 ns 3.1E+02 n 1.3E+03 n 9.3E+01 n Chlorobutane, 1- 109-69-3 4.0E-02 P V 1 7.9E+02 3.1E+03 ns 4.1E+04 ns 1.5E+03 n Chlorodifluoromethane 75-45-6 5.0E+01 I V 1 1.7E+03 5.3E+04 ns 2.2E+05 nms 5.2E+04 n 2.2E+05 n 1.0E+05 n Chloroform 67-66-3 3.1E-02 C 2.3E-05 I 1.0E-02 I 9.8E-02 A V 1 2.7E+03 3.0E-01 c 1.5E+00 c 1.1E-01 c 5.3E-01 c 1.9E-01 c Chloromethane 74-87-3 9.0E-02 I V 1 1.4E+03 1.2E+02 n 5.1E+02 n 9.4E+01 n 3.9E+02 n 1.9E+02 n Chloromethyl Methyl Ether 107-30-2 2.4E+00 C 6.9E-04 C V 1 8.1E+03 1.8E-02 c 8.8E-02 c 3.5E-03 c 1.8E-02 c 5.6E-03 c Chloronaphthalene, Beta- 91-58-7 8.0E-02 I V 1 2.1E+02 6.3E+03 ns 8.2E+04 ns 2.9E+03 n Chloronitrobenzene, o- 88-73-3 9.7E-03 P 1.0E-03 P 7.0E-05 P 1 0.1 5.0E+01 c** 1.8E+02 c** 7.3E-02 n 3.1E-01 n 6.9E+00 c** Chloronitrobenzene, p- 100-00-5 6.3E-03 P 1.0E-03 P 6.0E-04 P 1 0.1 6.1E+01 n 2.7E+02 c** 6.3E-01 n 2.6E+00 n 1.1E+01 c** Chlorophenol, 2- 95-57-8 5.0E-03 I V 1 7.9E+04 3.9E+02 n 5.1E+03 n 1.8E+02 n Chloropicrin 76-06-2 4.0E-04 CChlorothalonil 1897-45-6 3.1E-03 C 8.9E-07 C 1.5E-02 I 1 0.1 1.6E+02 c** 5.6E+02 c* 2.7E+00 c 1.4E+01 c 2.2E+01 c* Chlorotoluene, o- 95-49-8 2.0E-02 I V 1 1.0E+03 1.6E+03 ns 2.0E+04 ns 7.3E+02 n Chlorotoluene, p- 106-43-4 7.0E-02 P V 1 2.9E+02 5.5E+03 ns 7.2E+04 ns 2.6E+03 n Chlorpropham 101-21-3 2.0E-01 I 1 0.1 1.2E+04 n 1.2E+05 nm 7.3E+03 n Chlorpyrifos 2921-88-2 3.0E-03 I 1 0.1 1.8E+02 n 1.8E+03 n 1.1E+02 n Chlorpyrifos Methyl 5598-13-0 1.0E-02 H 1 0.1 6.1E+02 n 6.2E+03 n 3.7E+02 n Chlorsulfuron 64902-72-3 5.0E-02 I 1 0.1 3.1E+03 n 3.1E+04 n 1.8E+03 n Chlorthiophos 60238-56-4 8.0E-04 H 1 0.1 4.9E+01 n 4.9E+02 n 2.9E+01 n Chromium (III) (Insoluble Salts) 16065-83-1 1.5E+00 I 0.013 1.2E+05 nm 1.5E+06 nm 5.5E+04 n Chromium VI (chromic acid mists) 18540-29-9 8.4E-02 I 3.0E-03 I 8.0E-06 I 1 2.9E-05 c 1.5E-04 c 1.1E+02 n Chromium VI (particulates) 18540-29-9 8.4E-02 I 3.0E-03 I 1.0E-04 I 0.025 3.9E+01 c** 2.0E+02 c* 2.9E-05 c 1.5E-04 cChromium(VI), Aerosol Mists 7738-94-5 2.0E-02 C 5.0E-06 A 1 1.3E+03 n 1.2E+04 n 5.2E-03 n 2.2E-02 n 7.3E+02 nChromium, Total (1:6 ratio Cr VI : Cr III) 7440-47-3 1.2E-02 I 0.013 2.8E+02 c 1.4E+03 c 2.0E-04 c 1.0E-03 c Cobalt 7440-48-4 9.0E-03 P 3.0E-04 P 6.0E-06 P 1 2.3E+01 n 3.0E+02 n 2.7E-04 c* 1.4E-03 c* 1.1E+01 n Coke Oven Emissions 8007-45-2 6.2E-04 I M 1 0.1 1.5E-03 c 2.0E-02 cCopper 7440-50-8 4.0E-02 H 1 3.1E+03 n 4.1E+04 n 1.5E+03 n Cresol, m- 108-39-4 5.0E-02 I 1 0.1 3.1E+03 n 3.1E+04 n 1.8E+03 n Cresol, o- 95-48-7 5.0E-02 I 1 0.1 3.1E+03 n 3.1E+04 n 1.8E+03 n Cresol, p- 106-44-5 5.0E-03 H 1 0.1 3.1E+02 n 3.1E+03 n 1.8E+02 n Cresols 1319-77-3 1.0E-01 A 6.0E-01 C V 1 7.1E+04 7.6E+03 n 9.3E+04 ns 6.3E+02 n 2.6E+03 n 9.3E+02 n Crotonaldehyde, trans- 123-73-9 1.9E+00 H V 1 2.4E+04 3.4E-01 c 1.5E+00 c 3.5E-02 c Cumene 98-82-8 1.0E-01 I 4.0E-01 I V 1 3.1E+02 2.2E+03 ns 1.1E+04 ns 4.2E+02 n 1.8E+03 n 6.8E+02 n Cyanazine 21725-46-2 8.4E-01 H 2.0E-03 H 1 0.1 5.8E-01 c 2.1E+00 c 8.0E-02 c 

Page 2 of 9
Regional Screening Level Table (RSL) Master APRIL 2009 

SFO IUR RfDo RfCi Csat

Residential 

Soil

Industrial 

Soil

Residential 

Air

Industrial 

Air Tapwater 

(mg/kg-day)-1 (ug/m3)-1 (mg/kg-day) (mg/m3) mg/kg mg/kg mg/kg ug/m3 ug/m3 ug/L 

Key: I = IRIS; P = PPRTV; A = ATSDR; C = Cal EPA; H = HEAST; W = WHO; S = see user guide Section 5; L = see user guide on lead; M = mutagen; V = volatile; F = See FAQ #28; c = cancer; * = where: n SL < 100X c SL; ** = where n SL < 10X c SL; 

(See User's Guide); s = Concentration may exceed Csat (See User's Guide); SSL values are bsed on DAF=1

Contaminant Toxicity and Chemical-specific Information Screening Levels 

Analyte CAS No.

key

key

key

key

v

o

c

mutagen key key key GIABS ABS key key

Cyanides~Calcium Cyanide 592-01-8 4.0E-02 I 1 3.1E+03 n 4.1E+04 n 1.5E+03 n~Copper Cyanide 544-92-3 5.0E-03 I 1 3.9E+02 n 5.1E+03 n 1.8E+02 n~Cyanide (CN-) 57-12-5 2.0E-02 I 1 1.6E+03 n 2.0E+04 n 7.3E+02 n ~Cyanogen 460-19-5 4.0E-02 I V 1 3.1E+03 n 4.1E+04 n 1.5E+03 n~Cyanogen Bromide 506-68-3 9.0E-02 I V 1 7.0E+03 n 9.2E+04 n 3.3E+03 n~Cyanogen Chloride 506-77-4 5.0E-02 I V 1 3.9E+03 n 5.1E+04 n 1.8E+03 n~Hydrogen Cyanide 74-90-8 2.0E-02 I 3.0E-03 I V 1 1.6E+03 n 2.0E+04 n 3.1E+00 n 1.3E+01 n 6.2E+00 n~Potassium Cyanide 151-50-8 5.0E-02 I 1 3.9E+03 n 5.1E+04 n 1.8E+03 n~Potassium Silver Cyanide 506-61-6 2.0E-01 I 0.04 1.6E+04 n 2.0E+05 nm 7.3E+03 n~Silver Cyanide 506-64-9 1.0E-01 I 0.04 7.8E+03 n 1.0E+05 nm 3.7E+03 n~Sodium Cyanide 143-33-9 4.0E-02 I 1 3.1E+03 n 4.1E+04 n 1.5E+03 n~Thiocyanate 463-56-9 2.0E-04 P V 1 5.6E+03 1.6E+01 n 2.0E+02 n 7.3E+00 n ~Zinc Cyanide 557-21-1 5.0E-02 I 1 3.9E+03 n 5.1E+04 n 1.8E+03 nCyclohexane 110-82-7 6.0E+00 I V 1 1.2E+02 7.2E+03 ns 3.0E+04 ns 6.3E+03 n 2.6E+04 n 1.3E+04 n Cyclohexane, 1,2,3,4,5-pentabromo-6-chloro- 87-84-3 2.3E-02 H 1 0.1 2.1E+01 c 7.5E+01 c 2.9E+00 c Cyclohexanone 108-94-1 5.0E+00 I 1 0.1 3.1E+05 nm 3.1E+06 nm 1.8E+05 n Cyclohexylamine 108-91-8 2.0E-01 I 1 0.1 1.2E+04 n 1.2E+05 nm 7.3E+03 n Cyhalothrin/karate 68085-85-8 5.0E-03 I 1 0.1 3.1E+02 n 3.1E+03 n 1.8E+02 n Cypermethrin 52315-07-8 1.0E-02 I 1 0.1 6.1E+02 n 6.2E+03 n 3.7E+02 n Cyromazine 66215-27-8 7.5E-03 I 1 0.1 4.6E+02 n 4.6E+03 n 2.7E+02 n DDD 72-54-8 2.4E-01 I 6.9E-05 C 1 0.1 2.0E+00 c 7.2E+00 c 3.5E-02 c 1.8E-01 c 2.8E-01 c DDE, p,p'- 72-55-9 3.4E-01 I 9.7E-05 C 1 0.1 1.4E+00 c 5.1E+00 c 2.5E-02 c 1.3E-01 c 2.0E-01 c DDT 50-29-3 3.4E-01 I 9.7E-05 I 5.0E-04 I 1 0.03 1.7E+00 c* 7.0E+00 c* 2.5E-02 c 1.3E-01 c 2.0E-01 c* Dacthal 1861-32-1 1.0E-02 I 1 0.1 6.1E+02 n 6.2E+03 n 3.7E+02 n Dalapon 75-99-0 3.0E-02 I 1 0.1 1.8E+03 n 1.8E+04 n 1.1E+03 n Decabromodiphenyl ether, 2,2',3,3',4,4',5,5',6,6'- (BDE-209) 1163-19-5 7.0E-04 I 7.0E-03 I 1 0.1 4.3E+02 n 2.5E+03 c** 9.6E+01 c** Demeton 8065-48-3 4.0E-05 I 1 0.1 2.4E+00 n 2.5E+01 n 1.5E+00 nDi(2-ethylhexyl)adipate 103-23-1 1.2E-03 I 6.0E-01 I 1 0.1 4.0E+02 c* 1.4E+03 c 5.6E+01 c Diallate 2303-16-4 6.1E-02 H 1 0.1 8.0E+00 c 2.8E+01 c 1.1E+00 c Diazinon 333-41-5 7.0E-04 A 1 0.1 4.3E+01 n 4.3E+02 n 2.6E+01 n Dibromo-3-chloropropane, 1,2- 96-12-8 8.0E-01 P 6.0E-03 P 2.0E-04 P 2.0E-04 I V M 1 1.1E+03 5.6E-03 c 7.3E-02 c 1.6E-04 c 2.0E-03 c 3.2E-04 c Dibromobenzene, 1,4- 106-37-6 1.0E-02 I 1 0.1 6.1E+02 n 6.2E+03 n 3.7E+02 n Dibromochloromethane 124-48-1 8.4E-02 I 2.7E-05 C 2.0E-02 I V 1 0.1 8.5E+02 7.0E-01 c 3.4E+00 c 9.0E-02 c 4.5E-01 c 1.5E-01 c Dibromoethane, 1,2- 106-93-4 2.0E+00 I 6.0E-04 I 9.0E-03 I 9.0E-03 I V 1 1.4E+03 3.4E-02 c 1.7E-01 c 4.1E-03 c 2.0E-02 c 6.5E-03 c Dibromomethane (Methylene Bromide) 74-95-3 1.0E-02 H V 1 3.0E+03 7.8E+02 n 1.0E+04 ns 3.7E+02 n Dibutyl Phthalate 84-74-2 1.0E-01 I 1 0.1 6.1E+03 n 6.2E+04 n 3.7E+03 n Dibutyltin Compounds NA 3.0E-04 P 1 0.1 1.8E+01 n 1.8E+02 n 1.1E+01 nDicamba 1918-00-9 3.0E-02 I 1 0.1 1.8E+03 n 1.8E+04 n 1.1E+03 n Dichloro-2-butene, 1,4- 764-41-0 4.2E-03 P V 1 6.1E+02 2.0E-03 c 9.9E-03 c 5.8E-04 c 2.9E-03 c 1.2E-03 c Dichloro-2-butene, cis-1,4- 1476-11-5 4.2E-03 P V 1 0.1 6.1E+02 2.1E-03 c 1.1E-02 c 5.8E-04 c 2.9E-03 c 1.2E-03 c Dichloro-2-butene, trans-1,4- 110-57-6 4.2E-03 P V 1 0.1 5.8E+02 7.3E-03 c 3.7E-02 c 5.8E-04 c 2.9E-03 c 1.2E-03 c Dichloroacetic Acid 79-43-6 5.0E-02 I 4.0E-03 I 1 0.1 9.7E+00 c* 3.4E+01 c* 1.3E+00 c Dichlorobenzene, 1,2- 95-50-1 9.0E-02 I 2.0E-01 H V 1 2.2E+02 2.0E+03 ns 1.0E+04 ns 2.1E+02 n 8.8E+02 n 3.7E+02 n Dichlorobenzene, 1,4- 106-46-7 5.4E-03 C 1.1E-05 C 7.0E-02 A 8.0E-01 I V 1 2.6E+00 c 1.3E+01 c 2.2E-01 c 1.1E+00 c 4.3E-01 c Dichlorobenzidine, 3,3'- 91-94-1 4.5E-01 I 3.4E-04 C 1 0.1 1.1E+00 c 3.8E+00 c 7.2E-03 c 3.6E-02 c 1.5E-01 c Dichlorodifluoromethane 75-71-8 2.0E-01 I 2.0E-01 H V 1 8.5E+02 1.9E+02 n 7.8E+02 n 2.1E+02 n 8.8E+02 n 3.9E+02 n Dichloroethane, 1,1- 75-34-3 5.7E-03 C 1.6E-06 C 2.0E-01 P V 1 1.8E+03 3.4E+00 c 1.7E+01 c 1.5E+00 c 7.7E+00 c 2.4E+00 c Dichloroethane, 1,2- 107-06-2 9.1E-02 I 2.6E-05 I 2.0E-02 P 2.4E+00 A V 1 1.9E+03 4.5E-01 c 2.2E+00 c 9.4E-02 c 4.7E-01 c 1.5E-01 c Dichloroethylene, 1,1- 75-35-4 5.0E-02 I 2.0E-01 I V 1 1.2E+03 2.5E+02 n 1.1E+03 n 2.1E+02 n 8.8E+02 n 3.4E+02 n Dichloroethylene, 1,2- (Mixed Isomers) 540-59-0 9.0E-03 H V 1 1.4E+03 7.0E+02 n 9.2E+03 ns 3.3E+02 n Dichloroethylene, 1,2-cis- 156-59-2 1.0E-02 P V 1 1.4E+03 7.8E+02 n 1.0E+04 ns 3.7E+02 n Dichloroethylene, 1,2-trans- 156-60-5 2.0E-02 I 6.0E-02 P V 1 1.5E+03 1.1E+02 n 5.0E+02 n 6.3E+01 n 2.6E+02 n 1.1E+02 n Dichlorophenol, 2,4- 120-83-2 3.0E-03 I 1 0.1 1.8E+02 n 1.8E+03 n 1.1E+02 n Dichlorophenoxy Acetic Acid, 2,4- 94-75-7 1.0E-02 I 1 0.05 6.9E+02 n 7.7E+03 n 3.7E+02 n Dichlorophenoxy)butyric Acid, 4-(2,4- 94-82-6 8.0E-03 I 1 0.1 4.9E+02 n 4.9E+03 n 2.9E+02 n Dichloropropane, 1,2- 78-87-5 3.6E-02 C 1.0E-05 C 9.0E-02 A 4.0E-03 I V 1 1.5E+03 9.3E-01 c* 4.7E+00 c* 2.4E-01 c* 1.2E+00 c* 3.9E-01 c* Dichloropropane, 1,3- 142-28-9 2.0E-02 P V 1 1.6E+03 1.6E+03 n 2.0E+04 ns 7.3E+02 n Dichloropropanol, 2,3- 616-23-9 3.0E-03 I 1 0.1 1.8E+02 n 1.8E+03 n 1.1E+02 n Dichloropropene, 1,3- 542-75-6 1.0E-01 I 4.0E-06 I 3.0E-02 I 2.0E-02 I V 1 1.7E+03 1.7E+00 c* 8.4E+00 c* 6.1E-01 c* 3.1E+00 c* 4.3E-01 c* Dichlorvos 62-73-7 2.9E-01 I 8.3E-05 C 5.0E-04 I 5.0E-04 I 1 0.1 1.7E+00 c* 5.9E+00 c* 2.9E-02 c* 1.5E-01 c* 2.3E-01 c* Dicyclopentadiene 77-73-6 8.0E-03 P 7.0E-03 P V 1 5.9E+02 2.9E+01 n 1.3E+02 n 7.3E+00 n 3.1E+01 n 1.4E+01 n Dieldrin 60-57-1 1.6E+01 I 4.6E-03 I 5.0E-05 I 1 0.1 3.0E-02 c 1.1E-01 c 5.3E-04 c 2.7E-03 c 4.2E-03 c Diesel Engine Exhaust NA 3.0E-04 C 5.0E-03 I 1 0.1 8.1E-03 c 4.1E-02 cDiethyl Phthalate 84-66-2 8.0E-01 I 1 0.1 4.9E+04 n 4.9E+05 nm 2.9E+04 n Diethylene Glycol Monobutyl Ether 112-34-5 1.0E-02 P 2.0E-02 P 1 0.1 6.1E+02 n 6.2E+03 n 2.1E+01 n 8.8E+01 n 3.7E+02 n Diethylene Glycol Monoethyl Ether 111-90-0 6.0E-02 P 3.0E-03 P 1 0.1 3.7E+03 n 3.7E+04 n 3.1E+00 n 1.3E+01 n 2.2E+03 n Diethylformamide 617-84-5 1.0E-03 P 1 0.1 6.1E+01 n 6.2E+02 n 3.7E+01 n Diethylstilbestrol 56-53-1 3.5E+02 C 1.0E-01 C 1 0.1 1.4E-03 c 4.9E-03 c 2.4E-05 c 1.2E-04 c 1.9E-04 c Difenzoquat 43222-48-6 8.0E-02 I 1 0.1 4.9E+03 n 4.9E+04 n 2.9E+03 nDiflubenzuron 35367-38-5 2.0E-02 I 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Difluoroethane, 1,1- 75-37-6 4.0E+01 I V 1 1.5E+03 5.3E+04 ns 2.2E+05 nms 4.2E+04 n 1.8E+05 n 8.3E+04 n Diisopropyl Ether 108-20-3 4.0E-01 P V 1 1.6E+03 1.2E+03 n 5.1E+03 ns 4.2E+02 n 1.8E+03 n 8.3E+02 n Diisopropyl Methylphosphonate 1445-75-6 8.0E-02 I V 1 4.3E+02 6.3E+03 ns 8.2E+04 ns 2.9E+03 n Dimethipin 55290-64-7 2.0E-02 I 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Dimethoate 60-51-5 2.0E-04 I 1 0.1 1.2E+01 n 1.2E+02 n 7.3E+00 n Dimethoxybenzidine, 3,3'- 119-90-4 1.4E-02 H 1 0.1 3.5E+01 c 1.2E+02 c 4.8E+00 c 

Page 3 of 9
Regional Screening Level Table (RSL) Master APRIL 2009 

SFO IUR RfDo RfCi Csat

Residential 

Soil

Industrial 

Soil

Residential 

Air

Industrial 

Air Tapwater 

(mg/kg-day)-1 (ug/m3)-1 (mg/kg-day) (mg/m3) mg/kg mg/kg mg/kg ug/m3 ug/m3 ug/L 

Key: I = IRIS; P = PPRTV; A = ATSDR; C = Cal EPA; H = HEAST; W = WHO; S = see user guide Section 5; L = see user guide on lead; M = mutagen; V = volatile; F = See FAQ #28; c = cancer; * = where: n SL < 100X c SL; ** = where n SL < 10X c SL; 

(See User's Guide); s = Concentration may exceed Csat (See User's Guide); SSL values are bsed on DAF=1

Contaminant Toxicity and Chemical-specific Information Screening Levels 

Analyte CAS No.

key

key

key

key

v

o

c

mutagen key key key GIABS ABS key key

Dimethyl methylphosphonate 756-79-6 1.7E-03 P 6.0E-02 P 1 0.1 2.9E+02 c* 1.0E+03 c* 4.0E+01 c* Dimethylamino azobenzene [p-] 60-11-7 4.6E+00 C 1.3E-03 C 1 0.1 1.1E-01 c 3.7E-01 c 1.9E-03 c 9.4E-03 c 1.5E-02 c Dimethylaniline HCl, 2,4- 21436-96-4 5.8E-01 H 1 0.1 8.4E-01 c 3.0E+00 c 1.2E-01 c Dimethylaniline, 2,4- 95-68-1 7.5E-01 H 1 0.1 6.5E-01 c 2.3E+00 c 9.0E-02 c Dimethylaniline, N,N- 121-69-7 2.0E-03 I V 1 8.2E+02 1.6E+02 n 2.0E+03 ns 7.3E+01 n Dimethylbenzidine, 3,3'- 119-93-7 1.1E+01 P 1 0.1 4.4E-02 c 1.6E-01 c 6.1E-03 c Dimethylformamide 68-12-2 1.0E-01 P 3.0E-02 I 1 0.1 6.1E+03 n 6.2E+04 n 3.1E+01 n 1.3E+02 n 3.7E+03 n Dimethylhydrazine, 1,2- 540-73-8 5.5E+02 C 1.6E-01 C 1 0.1 8.8E-04 c 3.1E-03 c 1.5E-05 c 7.7E-05 c 1.2E-04 c Dimethylphenol, 2,4- 105-67-9 2.0E-02 I 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Dimethylphenol, 2,6- 576-26-1 6.0E-04 I 1 0.1 3.7E+01 n 3.7E+02 n 2.2E+01 n Dimethylphenol, 3,4- 95-65-8 1.0E-03 I 1 0.1 6.1E+01 n 6.2E+02 n 3.7E+01 n Dimethylterephthalate 120-61-6 1.0E-01 I V 1 6.1E+00 7.8E+03 ns 1.0E+05 nms 3.7E+03 n Dinitro-o-cresol, 4,6- 534-52-1 1.0E-04 P 1 0.1 6.1E+00 n 6.2E+01 n 3.7E+00 n Dinitro-o-cyclohexyl Phenol, 4,6- 131-89-5 2.0E-03 I 1 0.1 1.2E+02 n 1.2E+03 n 7.3E+01 n Dinitrobenzene, 1,2- 528-29-0 1.0E-04 P 1 0.1 6.1E+00 n 6.2E+01 n 3.7E+00 n Dinitrobenzene, 1,3- 99-65-0 1.0E-04 I 1 0.1 6.1E+00 n 6.2E+01 n 3.7E+00 n Dinitrobenzene, 1,4- 100-25-4 1.0E-04 P 1 0.1 6.1E+00 n 6.2E+01 n 3.7E+00 n Dinitrophenol, 2,4- 51-28-5 2.0E-03 I 1 0.1 1.2E+02 n 1.2E+03 n 7.3E+01 n Dinitrotoluene Mixture, 2,4/2,6- 25321-14-6 6.8E-01 I 1 0.1 7.1E-01 c 2.5E+00 c 9.9E-02 c Dinitrotoluene, 2,4- 121-14-2 3.1E-01 C 8.9E-05 C 2.0E-03 I 1 0.102 1.6E+00 c* 5.5E+00 c 2.7E-02 c 1.4E-01 c 2.2E-01 c Dinitrotoluene, 2,6- 606-20-2 1.0E-03 P 1 0.099 6.1E+01 n 6.2E+02 n 3.7E+01 n Dinitrotoluene, 2-Amino-4,6- 35572-78-2 2.0E-03 I 1 0.006 1.5E+02 n 2.0E+03 n 7.3E+01 n Dinitrotoluene, 4-Amino-2,6- 19406-51-0 2.0E-03 I 1 0.009 1.5E+02 n 1.9E+03 n 7.3E+01 n Dinoseb 88-85-7 1.0E-03 I 1 0.1 6.1E+01 n 6.2E+02 n 3.7E+01 n Dioxane, 1,4- 123-91-1 1.1E-02 I 7.7E-06 C 1.0E-01 A 3.6E+00 A 1 0.1 4.4E+01 c 1.6E+02 c 3.2E-01 c 1.6E+00 c 6.1E+00 c Dioxins~Hexachlorodibenzo-p-dioxin, Mixture NA 6.2E+03 I 1.3E+00 I 1 0.03 9.4E-05 c 3.9E-04 c 1.9E-06 c 9.4E-06 c 1.1E-05 c ~TCDD, 2,3,7,8- 1746-01-6 1.3E+05 C 3.8E+01 C 1.0E-09 A 4.0E-08 C 1 0.03 4.5E-06 c* 1.8E-05 c* 6.4E-08 c 3.2E-07 c 5.2E-07 c* Diphenamid 957-51-7 3.0E-02 I 1 0.1 1.8E+03 n 1.8E+04 n 1.1E+03 n Diphenyl Sulfone 127-63-9 3.0E-03 P 1 0.1 1.8E+02 n 1.8E+03 n 1.1E+02 n Diphenylamine 122-39-4 2.5E-02 I 1 0.1 1.5E+03 n 1.5E+04 n 9.1E+02 n Diphenylhydrazine, 1,2- 122-66-7 8.0E-01 I 2.2E-04 I 1 0.1 6.1E-01 c 2.2E+00 c 1.1E-02 c 5.6E-02 c 8.4E-02 c Diquat 85-00-7 2.2E-03 I 1 0.1 1.3E+02 n 1.4E+03 n 8.0E+01 n Direct Black 38 1937-37-7 7.4E+00 C 2.1E-03 C 1 0.1 6.6E-02 c 2.3E-01 c 1.2E-03 c 5.8E-03 c 9.1E-03 c Direct Blue 6 2602-46-2 7.4E+00 C 2.1E-03 C 1 0.1 6.6E-02 c 2.3E-01 c 1.2E-03 c 5.8E-03 c 9.1E-03 c Direct Brown 95 16071-86-6 6.7E+00 C 1.9E-03 C 1 0.1 7.2E-02 c 2.6E-01 c 1.3E-03 c 6.5E-03 c 1.0E-02 cDisulfoton 298-04-4 4.0E-05 I 1 0.1 2.4E+00 n 2.5E+01 n 1.5E+00 n Dithiane, 1,4- 505-29-3 1.0E-02 I 1 0.1 6.1E+02 n 6.2E+03 n 3.7E+02 n Diuron 330-54-1 2.0E-03 I 1 0.1 1.2E+02 n 1.2E+03 n 7.3E+01 n Dodine 2439-10-3 4.0E-03 I 1 0.1 2.4E+02 n 2.5E+03 n 1.5E+02 n EPTC 759-94-4 2.5E-02 I V 1 6.2E+02 2.0E+03 ns 2.6E+04 ns 9.1E+02 n Endosulfan 115-29-7 6.0E-03 I 1 0.1 3.7E+02 n 3.7E+03 n 2.2E+02 n Endothall 145-73-3 2.0E-02 I 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Endrin 72-20-8 3.0E-04 I 1 0.1 1.8E+01 n 1.8E+02 n 1.1E+01 n Epichlorohydrin 106-89-8 9.9E-03 I 1.2E-06 I 6.0E-03 P 1.0E-03 I V 1 8.4E+03 1.8E+01 n 7.7E+01 n 1.0E+00 n 4.4E+00 n 2.1E+00 n Epoxybutane, 1,2- 106-88-7 2.0E-02 I V 1 1.2E+04 1.5E+02 n 6.4E+02 n 2.1E+01 n 8.8E+01 n 4.2E+01 n Ethephon 16672-87-0 5.0E-03 I 1 0.1 3.1E+02 n 3.1E+03 n 1.8E+02 n Ethion 563-12-2 5.0E-04 I 1 0.1 3.1E+01 n 3.1E+02 n 1.8E+01 n Ethoxyethanol Acetate, 2- 111-15-9 3.0E-01 H 3.0E-01 C 1 0.1 1.8E+04 n 1.8E+05 nm 3.1E+02 n 1.3E+03 n 1.1E+04 n Ethoxyethanol, 2- 110-80-5 4.0E-01 H 2.0E-01 I 1 0.1 2.4E+04 n 2.5E+05 nm 2.1E+02 n 8.8E+02 n 1.5E+04 n Ethyl Acetate 141-78-6 9.0E-01 I V 1 1.1E+04 7.0E+04 ns 9.2E+05 nms 3.3E+04 n Ethyl Acrylate 140-88-5 4.8E-02 H V 1 2.6E+03 1.3E+01 c 6.0E+01 c 1.4E+00 c Ethyl Chloride 75-00-3 1.0E+01 I V 1 2.2E+03 1.5E+04 ns 6.2E+04 ns 1.0E+04 n 4.4E+04 n 2.1E+04 n Ethyl Ether 60-29-7 2.0E-01 I V 1 8.2E+03 1.6E+04 ns 2.0E+05 nms 7.3E+03 n Ethyl Methacrylate 97-63-2 9.0E-02 H V 1 1.2E+03 7.0E+03 ns 9.2E+04 ns 3.3E+03 n Ethyl-p-nitrophenyl Phosphonate 2104-64-5 1.0E-05 I 1 0.1 6.1E-01 n 6.2E+00 n 3.7E-01 n Ethylbenzene 100-41-4 1.1E-02 C 2.5E-06 C 1.0E-01 I 1.0E+00 I V 1 5.5E+02 5.7E+00 c 2.9E+01 c 9.7E-01 c 4.9E+00 c 1.5E+00 c Ethylene Cyanohydrin 109-78-4 3.0E-02 P 1 0.1 1.8E+03 n 1.8E+04 n 1.1E+03 n Ethylene Diamine 107-15-3 9.0E-02 P 1 0.1 5.5E+03 n 5.5E+04 n 3.3E+03 n Ethylene Glycol 107-21-1 2.0E+00 I 4.0E-01 C 1 0.1 1.2E+05 nm 1.2E+06 nm 4.2E+02 n 1.8E+03 n 7.3E+04 n Ethylene Glycol Monobutyl Ether 111-76-2 5.0E-01 I 1.3E+01 I 1 0.1 3.1E+04 n 3.1E+05 nm 1.4E+04 n 5.7E+04 n 1.8E+04 n Ethylene Oxide 75-21-8 3.1E-01 C 8.8E-05 C 3.0E-02 C V 1 1.1E+05 1.6E-01 c 8.0E-01 c 2.8E-02 c 1.4E-01 c 4.4E-02 c Ethylene Thiourea 96-45-7 4.5E-02 C 1.3E-05 C 8.0E-05 I 1 0.1 4.9E+00 n 3.8E+01 c** 1.9E-01 c 9.4E-01 c 1.5E+00 c** Ethylphthalyl Ethyl Glycolate 84-72-0 3.0E+00 I 1 0.1 1.8E+05 nm 1.8E+06 nm 1.1E+05 n Express 101200-48-0 8.0E-03 I 1 0.1 4.9E+02 n 4.9E+03 n 2.9E+02 n Fenamiphos 22224-92-6 2.5E-04 I 1 0.1 1.5E+01 n 1.5E+02 n 9.1E+00 n Fenpropathrin 39515-41-8 2.5E-02 I 1 0.1 1.5E+03 n 1.5E+04 n 9.1E+02 n Fluometuron 2164-17-2 1.3E-02 I 1 0.1 7.9E+02 n 8.0E+03 n 4.7E+02 n Fluorine (Soluble Fluoride) 7782-41-4 6.0E-02 I 1 4.7E+03 n 6.1E+04 n 2.2E+03 n Fluridone 59756-60-4 8.0E-02 I 1 0.1 4.9E+03 n 4.9E+04 n 2.9E+03 n Flurprimidol 56425-91-3 2.0E-02 I 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Flutolanil 66332-96-5 6.0E-02 I 1 0.1 3.7E+03 n 3.7E+04 n 2.2E+03 n Fluvalinate 69409-94-5 1.0E-02 I 1 0.1 6.1E+02 n 6.2E+03 n 3.7E+02 n Folpet 133-07-3 3.5E-03 I 1.0E-01 I 1 0.1 1.4E+02 c* 4.9E+02 c 1.9E+01 c Fomesafen 72178-02-0 1.9E-01 I 1 0.1 2.6E+00 c 9.1E+00 c 3.5E-01 c Fonofos 944-22-9 2.0E-03 I 1 0.1 1.2E+02 n 1.2E+03 n 7.3E+01 n Formaldehyde 50-00-0 1.3E-05 I 2.0E-01 I 9.8E-03 A 1 0.1 1.2E+04 n 1.2E+05 nm 1.9E-01 c* 9.4E-01 c* 7.3E+03 n 

Page 4 of 9
Regional Screening Level Table (RSL) Master APRIL 2009 

SFO IUR RfDo RfCi Csat

Residential 

Soil

Industrial 

Soil

Residential 

Air

Industrial 

Air Tapwater 

(mg/kg-day)-1 (ug/m3)-1 (mg/kg-day) (mg/m3) mg/kg mg/kg mg/kg ug/m3 ug/m3 ug/L 

Key: I = IRIS; P = PPRTV; A = ATSDR; C = Cal EPA; H = HEAST; W = WHO; S = see user guide Section 5; L = see user guide on lead; M = mutagen; V = volatile; F = See FAQ #28; c = cancer; * = where: n SL < 100X c SL; ** = where n SL < 10X c SL; 

(See User's Guide); s = Concentration may exceed Csat (See User's Guide); SSL values are bsed on DAF=1

Contaminant Toxicity and Chemical-specific Information Screening Levels 

Analyte CAS No.

key

key

key

key

v

o

c

mutagen key key key GIABS ABS key key

Formic Acid 64-18-6 2.0E+00 H 3.0E-03 P 1 0.1 1.2E+05 nm 1.2E+06 nm 3.1E+00 n 1.3E+01 n 7.3E+04 n Fosetyl-AL 39148-24-8 3.0E+00 I 1 0.1 1.8E+05 nm 1.8E+06 nm 1.1E+05 nFurans~Furan 110-00-9 1.0E-03 I V 1 6.8E+03 7.8E+01 n 1.0E+03 n 3.7E+01 n Furazolidone 67-45-8 3.8E+00 H 1 0.1 1.3E-01 c 4.5E-01 c 1.8E-02 c Furfural 98-01-1 3.0E-03 I 5.0E-02 H 1 0.1 1.8E+02 n 1.8E+03 n 5.2E+01 n 2.2E+02 n 1.1E+02 n Furium 531-82-8 1.5E+00 C 4.3E-04 C 1 0.1 3.2E-01 c 1.1E+00 c 5.7E-03 c 2.9E-02 c 4.5E-02 c Furmecyclox 60568-05-0 3.0E-02 I 8.6E-06 C 1 0.1 1.6E+01 c 5.7E+01 c 2.8E-01 c 1.4E+00 c 2.2E+00 c Glufosinate, Ammonium 77182-82-2 4.0E-04 I 1 0.1 2.4E+01 n 2.5E+02 n 1.5E+01 n Glycidyl 765-34-4 4.0E-04 I 1.0E-03 H 1 0.1 2.4E+01 n 2.5E+02 n 1.0E+00 n 4.4E+00 n 1.5E+01 n Glyphosate 1071-83-6 1.0E-01 I 1 0.1 6.1E+03 n 6.2E+04 n 3.7E+03 n Goal 42874-03-3 3.0E-03 I 1 0.1 1.8E+02 n 1.8E+03 n 1.1E+02 n Guthion 86-50-0 3.0E-03 A 1.0E-02 A 1 0.1 1.8E+02 n 1.8E+03 n 1.0E+01 n 4.4E+01 n 1.1E+02 n Haloxyfop, Methyl 69806-40-2 5.0E-05 I 1 0.1 3.1E+00 n 3.1E+01 n 1.8E+00 n Harmony 79277-27-3 1.3E-02 I 1 0.1 7.9E+02 n 8.0E+03 n 4.7E+02 n Heptachlor 76-44-8 4.5E+00 I 1.3E-03 I 5.0E-04 I 1 0.1 1.1E-01 c 3.8E-01 c 1.9E-03 c 9.4E-03 c 1.5E-02 c Heptachlor Epoxide 1024-57-3 9.1E+00 I 2.6E-03 I 1.3E-05 I 1 0.1 5.3E-02 c* 1.9E-01 c* 9.4E-04 c 4.7E-03 c 7.4E-03 c* Hexabromobenzene 87-82-1 2.0E-03 I 1 0.1 1.2E+02 n 1.2E+03 n 7.3E+01 n Hexabromodiphenyl ether, 2,2',4,4',5,5'- (BDE-153) 68631-49-2 2.0E-04 I 1.6E+01 n 2.0E+02 n 7.3E+00 nHexachlorobenzene 118-74-1 1.6E+00 I 4.6E-04 I 8.0E-04 I 1 0.1 3.0E-01 c 1.1E+00 c 5.3E-03 c 2.7E-02 c 4.2E-02 c Hexachlorobutadiene 87-68-3 7.8E-02 I 2.2E-05 I 1.0E-03 P 1 0.1 6.2E+00 c** 2.2E+01 c* 1.1E-01 c 5.6E-01 c 8.6E-01 c* Hexachlorocyclohexane, Alpha- 319-84-6 6.3E+00 I 1.8E-03 I 8.0E-03 A 1 0.1 7.7E-02 c 2.7E-01 c 1.4E-03 c 6.8E-03 c 1.1E-02 c Hexachlorocyclohexane, Beta- 319-85-7 1.8E+00 I 5.3E-04 I 1 0.1 2.7E-01 c 9.6E-01 c 4.6E-03 c 2.3E-02 c 3.7E-02 c Hexachlorocyclohexane, Gamma- (Lindane) 58-89-9 1.1E+00 C 3.1E-04 C 3.0E-04 I 1 0.04 5.2E-01 c* 2.1E+00 c 7.8E-03 c 4.0E-02 c 6.1E-02 c Hexachlorocyclohexane, Technical 608-73-1 1.8E+00 I 5.1E-04 I 1 0.1 2.7E-01 c 9.6E-01 c 4.8E-03 c 2.4E-02 c 3.7E-02 c Hexachlorocyclopentadiene 77-47-4 6.0E-03 I 2.0E-04 I 1 0.1 3.7E+02 n 3.7E+03 n 2.1E-01 n 8.8E-01 n 2.2E+02 n Hexachloroethane 67-72-1 1.4E-02 I 4.0E-06 I 1.0E-03 I 1 0.1 3.5E+01 c** 1.2E+02 c** 6.1E-01 c 3.1E+00 c 4.8E+00 c** Hexachlorophene 70-30-4 3.0E-04 I 1 0.1 1.8E+01 n 1.8E+02 n 1.1E+01 n Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) 121-82-4 1.1E-01 I 3.0E-03 I 1 0.015 5.5E+00 c* 2.4E+01 c 6.1E-01 c Hexamethylene Diisocyanate, 1,6- 822-06-0 1.0E-05 I V 1 4.1E+03 3.7E+00 n 1.6E+01 n 1.0E-02 n 4.4E-02 n 2.1E-02 n Hexane, N- 110-54-3 6.0E-02 H 7.0E-01 I V 1 1.4E+02 5.7E+02 ns 2.6E+03 ns 7.3E+02 n 3.1E+03 n 8.8E+02 n Hexanedioic Acid 124-04-9 2.0E+00 P 1 0.1 1.2E+05 nm 1.2E+06 nm 7.3E+04 n Hexazinone 51235-04-2 3.3E-02 I 1 0.1 2.0E+03 n 2.0E+04 n 1.2E+03 n Hydrazine 302-01-2 3.0E+00 I 4.9E-03 I 2.0E-04 C 1 2.1E-01 c 9.5E-01 c 5.0E-04 c 2.5E-03 c 2.2E-02 cHydrazine Sulfate 10034-93-2 3.0E+00 I 4.9E-03 I 1 2.1E-01 c 9.5E-01 c 5.0E-04 c 2.5E-03 c 2.2E-02 cHydrogen Chloride 7647-01-0 2.0E-02 I 1 2.8E+07 nm 1.2E+08 nm 2.1E+01 n 8.8E+01 nHydrogen Fluoride 7664-39-3 4.0E-02 C 1.4E-02 C 1 3.1E+03 n 4.1E+04 n 1.5E+01 n 6.1E+01 n 1.5E+03 nHydrogen Sulfide 7783-06-4 2.0E-03 I 1 2.8E+06 nm 1.2E+07 nm 2.1E+00 n 8.8E+00 nHydroquinone 123-31-9 5.6E-02 P 4.0E-02 P 1 0.1 8.7E+00 c 3.1E+01 c 1.2E+00 c Imazalil 35554-44-0 1.3E-02 I 1 0.1 7.9E+02 n 8.0E+03 n 4.7E+02 n Imazaquin 81335-37-7 2.5E-01 I 1 0.1 1.5E+04 n 1.5E+05 nm 9.1E+03 n Iodine 7553-56-2 1.0E-02 A 7.8E+02 n 1.0E+04 n 3.7E+02 nIprodione 36734-19-7 4.0E-02 I 1 0.1 2.4E+03 n 2.5E+04 n 1.5E+03 n Iron 7439-89-6 7.0E-01 P 1 5.5E+04 n 7.2E+05 nm 2.6E+04 n Isobutyl Alcohol 78-83-1 3.0E-01 I V 1 9.6E+03 2.3E+04 ns 3.1E+05 nms 1.1E+04 n Isophorone 78-59-1 9.5E-04 I 2.0E-01 I 2.0E+00 C 1 0.1 5.1E+02 c* 1.8E+03 c* 2.1E+03 n 8.8E+03 n 7.1E+01 c Isopropalin 33820-53-0 1.5E-02 I 1 0.1 9.2E+02 n 9.2E+03 n 5.5E+02 n Isopropanol 67-63-0 7.0E+00 C 1 0.1 9.9E+09 nm 4.2E+10 nm 7.3E+03 n 3.1E+04 nIsopropyl Methyl Phosphonic Acid 1832-54-8 1.0E-01 I 1 0.1 6.1E+03 n 6.2E+04 n 3.7E+03 n Isoxaben 82558-50-7 5.0E-02 I 1 0.1 3.1E+03 n 3.1E+04 n 1.8E+03 n JP-7 NA 3.0E-01 A V 1 4.3E+08 nm 1.8E+09 nm 3.1E+02 n 1.3E+03 n 6.3E+02 nKerb 23950-58-5 7.5E-02 I 1 0.1 4.6E+03 n 4.6E+04 n 2.7E+03 n Lactofen 77501-63-4 2.0E-03 I 1 0.1 1.2E+02 n 1.2E+03 n 7.3E+01 n Lead Compounds~Lead and Compounds 7439-92-1 1 4.0E+02 nL 8.0E+02 nL ~Tetraethyl Lead 78-00-2 1.0E-07 I 1 0.1 6.1E-03 n 6.2E-02 n 3.7E-03 n Linuron 330-55-2 2.0E-03 I 1 0.1 1.2E+02 n 1.2E+03 n 7.3E+01 n Lithium 7439-93-2 2.0E-03 P 1 1.6E+02 n 2.0E+03 n 7.3E+01 n Lithium Perchlorate 7791-03-9 7.0E-04 I 1 5.5E+01 n 7.2E+02 n 2.6E+01 nLondax 83055-99-6 2.0E-01 I 1 0.1 1.2E+04 n 1.2E+05 nm 7.3E+03 n MCPA 94-74-6 5.0E-04 I 1 0.1 3.1E+01 n 3.1E+02 n 1.8E+01 n MCPB 94-81-5 1.0E-02 I 1 0.1 6.1E+02 n 6.2E+03 n 3.7E+02 n MCPP 93-65-2 1.0E-03 I 1 0.1 6.1E+01 n 6.2E+02 n 3.7E+01 n Malathion 121-75-5 2.0E-02 I 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Maleic Anhydride 108-31-6 1.0E-01 I 7.0E-04 C 1 0.1 6.1E+03 n 6.1E+04 n 7.3E-01 n 3.1E+00 n 3.7E+03 n Maleic Hydrazide 123-33-1 5.0E-01 I 1 0.1 3.1E+04 n 3.1E+05 nm 1.8E+04 n Malononitrile 109-77-3 1.0E-04 P 1 0.1 6.1E+00 n 6.2E+01 n 3.7E+00 n Mancozeb 8018-01-7 3.0E-02 H 1 0.1 1.8E+03 n 1.8E+04 n 1.1E+03 n Maneb 12427-38-2 5.0E-03 I 1 0.1 3.1E+02 n 3.1E+03 n 1.8E+02 n Manganese (Diet) 7439-96-5 1.4E-01 I 5.0E-05 I 1Manganese (Water) 7439-96-5 2.4E-02 I 5.0E-05 I 0.04 1.8E+03 n 2.3E+04 n 5.2E-02 n 2.2E-01 n 8.8E+02 n Mephosfolan 950-10-7 9.0E-05 H 1 0.1 5.5E+00 n 5.5E+01 n 3.3E+00 n Mepiquat Chloride 24307-26-4 3.0E-02 I 1 0.1 1.8E+03 n 1.8E+04 n 1.1E+03 n Mercury Compounds~Mercuric Chloride 7487-94-7 3.0E-04 I 0.07 2.3E+01 n 3.1E+02 n 1.1E+01 n~Mercuric Sulfide 1344-48-5 3.0E-04 I 1 2.3E+01 n 3.1E+02 n 1.1E+01 n~Mercury (elemental) 7439-97-6 1.6E-04 C 3.0E-04 I V 1 3.1E+00 4.3E+00 ns 2.4E+01 ns 3.1E-01 n 1.3E+00 n 5.7E-01 n 

Page 5 of 9
Regional Screening Level Table (RSL) Master APRIL 2009 

SFO IUR RfDo RfCi Csat

Residential 

Soil

Industrial 

Soil

Residential 

Air

Industrial 

Air Tapwater 

(mg/kg-day)-1 (ug/m3)-1 (mg/kg-day) (mg/m3) mg/kg mg/kg mg/kg ug/m3 ug/m3 ug/L 

Key: I = IRIS; P = PPRTV; A = ATSDR; C = Cal EPA; H = HEAST; W = WHO; S = see user guide Section 5; L = see user guide on lead; M = mutagen; V = volatile; F = See FAQ #28; c = cancer; * = where: n SL < 100X c SL; ** = where n SL < 10X c SL; 

(See User's Guide); s = Concentration may exceed Csat (See User's Guide); SSL values are bsed on DAF=1

Contaminant Toxicity and Chemical-specific Information Screening Levels 

Analyte CAS No.

key

key

key

key

v

o

c

mutagen key key key GIABS ABS key key

~Mercury, Inorganic Salts NA 3.0E-04 I 0.07 2.3E+01 n 3.1E+02 n 1.1E+01 n ~Methyl Mercury 22967-92-6 1.0E-04 I 1 7.8E+00 n 1.0E+02 n 3.7E+00 n~Phenylmercuric Acetate 62-38-4 8.0E-05 I 1 0.1 4.9E+00 n 4.9E+01 n 2.9E+00 n Merphos 150-50-5 3.0E-05 I 1 0.1 1.8E+00 n 1.8E+01 n 1.1E+00 n Merphos Oxide 78-48-8 3.0E-05 I 1 0.1 1.8E+00 n 1.8E+01 n 1.1E+00 n Metalaxyl 57837-19-1 6.0E-02 I 1 0.1 3.7E+03 n 3.7E+04 n 2.2E+03 n Methacrylonitrile 126-98-7 1.0E-04 I 7.0E-04 H V 1 4.5E+03 3.2E+00 n 1.8E+01 n 7.3E-01 n 3.1E+00 n 1.0E+00 n Methamidophos 10265-92-6 5.0E-05 I 1 0.1 3.1E+00 n 3.1E+01 n 1.8E+00 n Methanol 67-56-1 5.0E-01 I 4.0E+00 C 1 0.1 3.1E+04 n 3.1E+05 nm 4.2E+03 n 1.8E+04 n 1.8E+04 n Methidathion 950-37-8 1.0E-03 I 1 0.1 6.1E+01 n 6.2E+02 n 3.7E+01 n Methomyl 16752-77-5 2.5E-02 I 1 0.1 1.5E+03 n 1.5E+04 n 9.1E+02 n Methoxy-5-nitroaniline, 2- 99-59-2 4.9E-02 C 1.4E-05 C 1 0.1 9.9E+00 c 3.5E+01 c 1.7E-01 c 8.8E-01 c 1.4E+00 c Methoxychlor 72-43-5 5.0E-03 I 1 0.1 3.1E+02 n 3.1E+03 n 1.8E+02 n Methoxyethanol Acetate, 2- 110-49-6 2.0E-03 H 9.0E-02 C 1 0.1 1.2E+02 n 1.2E+03 n 9.4E+01 n 3.9E+02 n 7.3E+01 n Methoxyethanol, 2- 109-86-4 3.0E-03 P 2.0E-02 I 1 0.1 1.8E+02 n 1.8E+03 n 2.1E+01 n 8.8E+01 n 1.1E+02 n Methyl Acetate 79-20-9 1.0E+00 H V 1 2.9E+04 7.8E+04 ns 1.0E+06 nms 3.7E+04 n Methyl Acrylate 96-33-3 3.0E-02 H V 1 6.9E+03 2.3E+03 n 3.1E+04 ns 1.1E+03 n Methyl Ethyl Ketone (2-Butanone) 78-93-3 6.0E-01 I 5.0E+00 I V 1 2.8E+04 2.8E+04 ns 1.9E+05 nms 5.2E+03 n 2.2E+04 n 7.1E+03 n Methyl Isobutyl Ketone (4-methyl-2-pentanone) 108-10-1 8.0E-02 H 3.0E+00 I V 1 3.2E+03 5.3E+03 ns 5.2E+04 ns 3.1E+03 n 1.3E+04 n 2.0E+03 n Methyl Methacrylate 80-62-6 1.4E+00 I 7.0E-01 I V 1 2.5E+03 4.7E+03 ns 2.0E+04 ns 7.3E+02 n 3.1E+03 n 1.4E+03 n Methyl Parathion 298-00-0 2.5E-04 I 1 0.1 1.5E+01 n 1.5E+02 n 9.1E+00 n Methyl Phosphonic Acid 993-13-5 2.0E-02 P 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Methyl Styrene (Mixed Isomers) 25013-15-4 6.0E-03 H 4.0E-02 H V 1 4.5E+02 1.9E+02 n 1.1E+03 ns 4.2E+01 n 1.8E+02 n 6.0E+01 n Methyl methanesulfonate 66-27-3 9.9E-02 C 2.8E-05 C 1 0.1 4.9E+00 c 1.7E+01 c 8.7E-02 c 4.4E-01 c 6.8E-01 c Methyl tert-Butyl Ether (MTBE) 1634-04-4 1.8E-03 C 2.6E-07 C 3.0E+00 I V 1 6.9E+03 3.9E+01 c 1.9E+02 c 9.4E+00 c 4.7E+01 c 1.2E+01 c Methyl-5-Nitroaniline, 2- 99-55-8 3.3E-02 H 1 0.1 1.5E+01 c 5.2E+01 c 2.0E+00 c Methylaniline Hydrochloride, 2- 636-21-5 1.3E-01 C 3.7E-05 C 1 0.1 3.7E+00 c 1.3E+01 c 6.6E-02 c 3.3E-01 c 5.2E-01 c Methylarsonic acid 124-58-3 1.0E-02 A 1 0.1 6.1E+02 n 6.2E+03 n 3.7E+02 nMethylcholanthrene, 3- 56-49-5 2.2E+01 C 6.3E-03 C 1 0.1 2.2E-02 c 7.8E-02 c 3.9E-04 c 1.9E-03 c 3.1E-03 c Methylene Chloride 75-09-2 7.5E-03 I 4.7E-07 I 6.0E-02 I 1.0E+00 A V 1 3.5E+03 1.1E+01 c 5.4E+01 c 5.2E+00 c 2.6E+01 c 4.8E+00 c Methylene-bis(2-chloroaniline), 4,4'- 101-14-4 1.0E-01 P 4.3E-04 C 2.0E-03 P M 1 0.1 1.2E+00 c 1.7E+01 c* 2.2E-03 c 2.9E-02 c 2.2E-01 c Methylene-bis(N,N-dimethyl) Aniline, 4,4'- 101-61-1 4.6E-02 I 1.3E-05 C 1 0.1 1.1E+01 c 3.7E+01 c 1.9E-01 c 9.4E-01 c 1.5E+00 c Methylenebisbenzenamine, 4,4'- 101-77-9 1.6E+00 C 4.6E-04 C 2.0E-02 C 1 0.1 3.0E-01 c 1.1E+00 c 5.3E-03 c 2.7E-02 c 4.2E-02 c Methylenediphenyl Diisocyanate 101-68-8 6.0E-04 I 1 0.1 8.5E+05 nm 3.6E+06 nm 6.3E-01 n 2.6E+00 nMethylstyrene, Alpha- 98-83-9 7.0E-02 H V 1 4.5E+02 5.5E+03 ns 7.2E+04 ns 2.6E+03 n Metolachlor 51218-45-2 1.5E-01 I 1 0.1 9.2E+03 n 9.2E+04 n 5.5E+03 n Metribuzin 21087-64-9 2.5E-02 I 1 0.1 1.5E+03 n 1.5E+04 n 9.1E+02 n Mirex 2385-85-5 1.8E+01 C 5.1E-03 C 2.0E-04 I 1 0.1 2.7E-02 c 9.6E-02 c 4.8E-04 c 2.4E-03 c 3.7E-03 c Molinate 2212-67-1 2.0E-03 I 1 0.1 1.2E+02 n 1.2E+03 n 7.3E+01 n Molybdenum 7439-98-7 5.0E-03 I 1 3.9E+02 n 5.1E+03 n 1.8E+02 n Monochloramine 10599-90-3 1.0E-01 I 1 7.8E+03 n 1.0E+05 nm 3.7E+03 nMonomethylaniline 100-61-8 2.0E-03 P 1 0.1 1.2E+02 n 1.2E+03 n 7.3E+01 n N,N'-Diphenyl-1,4-benzenediamine 74-31-7 3.0E-04 P 1 0.1 1.8E+01 n 1.8E+02 n 1.1E+01 n Naled 300-76-5 2.0E-03 I 1 0.1 1.2E+02 n 1.2E+03 n 7.3E+01 n Naphthylamine, 2- 91-59-8 1.8E+00 C 0.0E+00 C 1 0.1 2.7E-01 c 9.6E-01 c 3.7E-02 c Napropamide 15299-99-7 1.0E-01 I 1 0.1 6.1E+03 n 6.2E+04 n 3.7E+03 n Nickel Refinery Dust NA 2.4E-04 I 0.04 1.4E+04 c 6.9E+04 c 1.0E-02 c 5.1E-02 cNickel Soluble Salts 7440-02-0 2.6E-04 C 2.0E-02 I 9.0E-05 A 0.04 1.5E+03 n 2.0E+04 n 9.4E-03 c* 4.7E-02 c** 7.3E+02 n Nickel Subsulfide 12035-72-2 1.7E+00 C 4.8E-04 I 0.04 3.8E-01 c 1.7E+00 c 5.1E-03 c 2.6E-02 c 4.0E-02 cNitrate 14797-55-8 1.6E+00 I 1 1.3E+05 nm 1.6E+06 nm 5.8E+04 n Nitrite 14797-65-0 1.0E-01 I 1 7.8E+03 n 1.0E+05 nm 3.7E+03 n Nitroaniline, 2- 88-74-4 3.0E-03 P 1.0E-04 P 1 0.1 1.8E+02 n 1.8E+03 n 1.0E-01 n 4.4E-01 n 1.1E+02 n Nitroaniline, 4- 100-01-6 2.0E-02 P 4.0E-03 P 6.0E-03 P 1 0.1 2.4E+01 c* 8.6E+01 c* 6.3E+00 n 2.6E+01 n 3.4E+00 c* Nitrobenzene 98-95-3 4.0E-05 I 2.0E-03 I 9.0E-03 I V 1 2.6E+03 4.4E+00 c* 2.2E+01 c* 6.1E-02 c 3.1E-01 c 1.2E-01 c Nitrofurantoin 67-20-9 7.0E-02 H 1 0.1 4.3E+03 n 4.3E+04 n 2.6E+03 n Nitrofurazone 59-87-0 1.3E+00 C 3.7E-04 C 1 0.1 3.7E-01 c 1.3E+00 c 6.6E-03 c 3.3E-02 c 5.2E-02 c Nitroglycerin 55-63-0 1.7E-02 P 1.0E-04 P 1 0.1 6.1E+00 n 6.2E+01 n 3.7E+00 n Nitroguanidine 556-88-7 1.0E-01 I 1 0.1 6.1E+03 n 6.2E+04 n 3.7E+03 n Nitromethane 75-52-5 9.0E-06 P 2.0E-02 P V 1 1.7E+04 4.7E+00 c* 2.4E+01 c* 2.7E-01 c* 1.4E+00 c* 5.4E-01 c* Nitropropane, 2- 79-46-9 2.7E-03 H 2.0E-02 I V 1 4.3E+03 1.2E-02 c 6.0E-02 c 9.0E-04 c 4.5E-03 c 1.8E-03 c Nitroso-N-ethylurea, N- 759-73-9 2.7E+01 C 7.7E-03 C 1 0.1 1.8E-02 c 6.4E-02 c 3.2E-04 c 1.6E-03 c 2.5E-03 c Nitroso-N-methylurea, N- 684-93-5 1.2E+02 C 3.4E-02 C 1 0.1 4.0E-03 c 1.4E-02 c 7.2E-05 c 3.6E-04 c 5.6E-04 c Nitroso-di-N-butylamine, N- 924-16-3 5.4E+00 I 1.6E-03 I V 1 1.3E+04 9.3E-02 c 4.3E-01 c 1.5E-03 c 7.7E-03 c 2.4E-03 c Nitroso-di-N-propylamine, N- 621-64-7 7.0E+00 I 2.0E-03 C 1 0.1 6.9E-02 c 2.5E-01 c 1.2E-03 c 6.1E-03 c 9.6E-03 c Nitrosodiethanolamine, N- 1116-54-7 2.8E+00 I 8.0E-04 C 1 0.1 1.7E-01 c 6.2E-01 c 3.0E-03 c 1.5E-02 c 2.4E-02 c Nitrosodiethylamine, N- 55-18-5 1.5E+02 I 4.3E-02 I M 1 0.1 7.7E-04 c 1.1E-02 c 2.2E-05 c 2.9E-04 c 1.4E-04 c Nitrosodimethylamine, N- 62-75-9 5.1E+01 I 1.4E-02 I 8.0E-06 P M 1 0.1 2.3E-03 c 3.4E-02 c 6.9E-05 c 8.8E-04 c 4.2E-04 c Nitrosodiphenylamine, N- 86-30-6 4.9E-03 I 2.6E-06 C 1 0.1 9.9E+01 c 3.5E+02 c 9.4E-01 c 4.7E+00 c 1.4E+01 c Nitrosomethylethylamine, N- 10595-95-6 2.2E+01 I 6.3E-03 C 1 0.1 2.2E-02 c 7.8E-02 c 3.9E-04 c 1.9E-03 c 3.1E-03 c Nitrosomorpholine [N-] 59-89-2 6.7E+00 C 1.9E-03 C 1 0.1 7.2E-02 c 2.6E-01 c 1.3E-03 c 6.5E-03 c 1.0E-02 c Nitrosopiperidine [N-] 100-75-4 9.4E+00 C 2.7E-03 C 1 0.1 5.2E-02 c 1.8E-01 c 9.0E-04 c 4.5E-03 c 7.2E-03 c Nitrosopyrrolidine, N- 930-55-2 2.1E+00 I 6.1E-04 I 1 0.1 2.3E-01 c 8.2E-01 c 4.0E-03 c 2.0E-02 c 3.2E-02 c Nitrotoluene, m- 99-08-1 2.0E-02 P 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Nitrotoluene, o- 88-72-2 2.2E-01 P 9.0E-04 P V 1 1.3E+03 2.9E+00 c* 1.3E+01 c* 3.1E-01 c Nitrotoluene, p- 99-99-0 1.6E-02 P 4.0E-03 P 1 0.1 3.0E+01 c** 1.1E+02 c* 4.2E+00 c* Norflurazon 27314-13-2 4.0E-02 I 1 0.1 2.4E+03 n 2.5E+04 n 1.5E+03 n Nustar 85509-19-9 7.0E-04 I 1 0.1 4.3E+01 n 4.3E+02 n 2.6E+01 n 

Page 6 of 9
Regional Screening Level Table (RSL) Master APRIL 2009 

SFO IUR RfDo RfCi Csat

Residential 

Soil

Industrial 

Soil

Residential 

Air

Industrial 

Air Tapwater 

(mg/kg-day)-1 (ug/m3)-1 (mg/kg-day) (mg/m3) mg/kg mg/kg mg/kg ug/m3 ug/m3 ug/L 

Key: I = IRIS; P = PPRTV; A = ATSDR; C = Cal EPA; H = HEAST; W = WHO; S = see user guide Section 5; L = see user guide on lead; M = mutagen; V = volatile; F = See FAQ #28; c = cancer; * = where: n SL < 100X c SL; ** = where n SL < 10X c SL; 

(See User's Guide); s = Concentration may exceed Csat (See User's Guide); SSL values are bsed on DAF=1

Contaminant Toxicity and Chemical-specific Information Screening Levels 

Analyte CAS No.

key

key

key

key

v

o

c

mutagen key key key GIABS ABS key key

Octabromodiphenyl Ether 32536-52-0 3.0E-03 I 1 0.1 1.8E+02 n 1.8E+03 n 1.1E+02 n Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetra (HMX) 2691-41-0 5.0E-02 I 1 0.006 3.8E+03 n 4.9E+04 n 1.8E+03 n Octamethylpyrophosphoramide 152-16-9 2.0E-03 H 1 0.1 1.2E+02 n 1.2E+03 n 7.3E+01 n Oryzalin 19044-88-3 5.0E-02 I 1 0.1 3.1E+03 n 3.1E+04 n 1.8E+03 n Oxadiazon 19666-30-9 5.0E-03 I 1 0.1 3.1E+02 n 3.1E+03 n 1.8E+02 n Oxamyl 23135-22-0 2.5E-02 I 1 0.1 1.5E+03 n 1.5E+04 n 9.1E+02 n Paclobutrazol 76738-62-0 1.3E-02 I 1 0.1 7.9E+02 n 8.0E+03 n 4.7E+02 n Paraquat Dichloride 1910-42-5 4.5E-03 I 1 0.1 2.7E+02 n 2.8E+03 n 1.6E+02 n Parathion 56-38-2 6.0E-03 H 1 0.1 3.7E+02 n 3.7E+03 n 2.2E+02 n Pebulate 1114-71-2 5.0E-02 H 1 0.1 3.1E+03 n 3.1E+04 n 1.8E+03 n Pendimethalin 40487-42-1 4.0E-02 I 1 0.1 2.4E+03 n 2.5E+04 n 1.5E+03 n Pentabromodiphenyl Ether 32534-81-9 2.0E-03 I 1 0.1 1.2E+02 n 1.2E+03 n 7.3E+01 n Pentabromodiphenyl ether, 2,2',4,4',5- (BDE-99) 60348-60-9 1.0E-04 I 7.8E+00 n 1.0E+02 n 3.7E+00 nPentachlorobenzene 608-93-5 8.0E-04 I 1 0.1 4.9E+01 n 4.9E+02 n 2.9E+01 n Pentachloroethane 76-01-7 9.0E-02 P 1 0.1 5.4E+00 c 1.9E+01 c 7.5E-01 c Pentachloronitrobenzene 82-68-8 2.6E-01 H 3.0E-03 I 1 0.1 1.9E+00 c* 6.6E+00 c 2.6E-01 c Pentachlorophenol 87-86-5 1.2E-01 I 4.6E-06 C 3.0E-02 I 1 0.25 3.0E+00 c 9.0E+00 c 5.3E-01 c 2.7E+00 c 5.6E-01 c Perchlorate and Perchlorate Salts 14797-73-0 7.0E-04 I 1 5.5E+01 n 7.2E+02 n 2.6E+01 n Permethrin 52645-53-1 5.0E-02 I 1 0.1 3.1E+03 n 3.1E+04 n 1.8E+03 n Phenacetin 62-44-2 2.2E-03 C 6.3E-07 C 1 0.1 2.2E+02 c 7.8E+02 c 3.9E+00 c 1.9E+01 c 3.1E+01 c Phenmedipham 13684-63-4 2.5E-01 I 1 0.1 1.5E+04 n 1.5E+05 nm 9.1E+03 n Phenol 108-95-2 3.0E-01 I 2.0E-01 C 1 0.1 1.8E+04 n 1.8E+05 nm 2.1E+02 n 8.8E+02 n 1.1E+04 n Phenylenediamine, m- 108-45-2 6.0E-03 I 1 0.1 3.7E+02 n 3.7E+03 n 2.2E+02 n Phenylenediamine, o- 95-54-5 4.7E-02 H 1 0.1 1.0E+01 c 3.7E+01 c 1.4E+00 c Phenylenediamine, p- 106-50-3 1.9E-01 H 1 0.1 1.2E+04 n 1.2E+05 nm 6.9E+03 n Phenylphenol, 2- 90-43-7 1.9E-03 H 1 0.1 2.5E+02 c 8.9E+02 c 3.5E+01 c Phorate 298-02-2 2.0E-04 H 1 0.1 1.2E+01 n 1.2E+02 n 7.3E+00 n Phosgene 75-44-5 3.0E-04 I V 1 8.7E+04 4.0E-01 n 1.7E+00 n 3.1E-01 n 1.3E+00 nPhosmet 732-11-6 2.0E-02 I 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Phosphine 7803-51-2 3.0E-04 I 3.0E-04 I 1 2.3E+01 n 3.1E+02 n 3.1E-01 n 1.3E+00 n 1.1E+01 nPhosphoric Acid 7664-38-2 1.0E-02 I 1 1.4E+07 nm 6.0E+07 nm 1.0E+01 n 4.4E+01 nPhosphorus, White 7723-14-0 2.0E-05 I 1 1.6E+00 n 2.0E+01 n 7.3E-01 n Phthalic Acid, P- 100-21-0 1.0E+00 H 1 0.1 6.1E+04 n 6.2E+05 nm 3.7E+04 n Phthalic Anhydride 85-44-9 2.0E+00 I 2.0E-02 C 1 0.1 1.2E+05 nm 1.2E+06 nm 2.1E+01 n 8.8E+01 n 7.3E+04 n Picloram 1918-02-1 7.0E-02 I 1 0.1 4.3E+03 n 4.3E+04 n 2.6E+03 n Picramic Acid (2-Amino-4,6-dinitrophenol) 96-91-3 2.0E-03 P 1 0.1 1.2E+02 n 1.2E+03 n 7.3E+01 n Pirimiphos, Methyl 29232-93-7 1.0E-02 I 1 0.1 6.1E+02 n 6.2E+03 n 3.7E+02 n Polybrominated Biphenyls 59536-65-1 3.0E+01 C 8.6E-03 C 7.0E-06 H 1 0.1 1.6E-02 c* 5.7E-02 c* 2.8E-04 c 1.4E-03 c 2.2E-03 cPolychlorinated Biphenyls (PCBs)~Aroclor 1016 12674-11-2 7.0E-02 I 2.0E-05 I 7.0E-05 I 1 0.14 3.9E+00 n 2.1E+01 c** 1.2E-01 c 6.1E-01 c 9.6E-01 c** ~Aroclor 1221 11104-28-2 2.0E+00 I 5.7E-04 I V 1 0.14 3.0E+02 1.7E-01 c 6.2E-01 c 4.3E-03 c 2.1E-02 c 6.8E-03 c ~Aroclor 1232 11141-16-5 2.0E+00 I 5.7E-04 I V 1 0.14 3.0E+02 1.7E-01 c 6.2E-01 c 4.3E-03 c 2.1E-02 c 6.8E-03 c ~Aroclor 1242 53469-21-9 2.0E+00 I 5.7E-04 I 1 0.14 2.2E-01 c 7.4E-01 c 4.3E-03 c 2.1E-02 c 3.4E-02 c ~Aroclor 1248 12672-29-6 2.0E+00 I 5.7E-04 I 1 0.14 2.2E-01 c 7.4E-01 c 4.3E-03 c 2.1E-02 c 3.4E-02 c ~Aroclor 1254 11097-69-1 2.0E+00 I 5.7E-04 I 2.0E-05 I 1 0.14 2.2E-01 c** 7.4E-01 c* 4.3E-03 c 2.1E-02 c 3.4E-02 c* ~Aroclor 1260 11096-82-5 2.0E+00 I 5.7E-04 I 1 0.14 2.2E-01 c 7.4E-01 c 4.3E-03 c 2.1E-02 c 3.4E-02 c ~Heptachlorobiphenyl, 2,3,3',4,4',5,5'- (PCB 189) 39635-31-9 1.3E+01 C 3.8E-03 C 1 0.14 3.4E-02 c 1.1E-01 c 6.4E-04 c 3.2E-03 c 5.2E-03 c ~Hexachlorobiphenyl, 2,3',4,4',5,5'- (PCB 167) 52663-72-6 1.3E+01 C 3.8E-03 C 1 0.14 3.4E-02 c 1.1E-01 c 6.4E-04 c 3.2E-03 c 5.2E-03 c ~Hexachlorobiphenyl, 2,3,3',4,4',5'- (PCB 157) 69782-90-7 6.5E+02 C 1.9E-02 C 1 0.14 6.8E-04 c 2.3E-03 c 1.3E-04 c 6.5E-04 c 1.0E-04 c ~Hexachlorobiphenyl, 2,3,3',4,4',5- (PCB 156) 38380-08-4 6.5E+02 C 1.9E-02 C 1 0.14 6.8E-04 c 2.3E-03 c 1.3E-04 c 6.5E-04 c 1.0E-04 c ~Hexachlorobiphenyl, 3,3',4,4',5,5'- (PCB 169) 32774-16-6 1.3E+01 C 3.8E-03 C 1 0.14 3.4E-02 c 1.1E-01 c 6.4E-04 c 3.2E-03 c 5.2E-03 c ~Pentachlorobiphenyl, 2',3,4,4',5- (PCB 123) 65510-44-3 1.3E+01 C 3.8E-03 C 1 0.14 3.4E-02 c 1.1E-01 c 6.4E-04 c 3.2E-03 c 5.2E-03 c ~Pentachlorobiphenyl, 2,3',4,4',5- (PCB 118) 31508-00-6 1.3E+01 C 3.8E-03 C 1 0.14 3.4E-02 c 1.1E-01 c 6.4E-04 c 3.2E-03 c 5.2E-03 c ~Pentachlorobiphenyl, 2,3,3',4,4'- (PCB 105) 32598-14-4 1.3E+01 C 3.8E-03 C 1 0.14 3.4E-02 c 1.1E-01 c 6.4E-04 c 3.2E-03 c 5.2E-03 c ~Pentachlorobiphenyl, 2,3,4,4',5- (PCB 114) 74472-37-0 6.5E+02 C 1.9E-02 C 1 0.14 6.8E-04 c 2.3E-03 c 1.3E-04 c 6.5E-04 c 1.0E-04 c ~Pentachlorobiphenyl, 3,3',4,4',5- (PCB 126) 57465-28-8 1.3E+04 C 3.8E+00 C 1 0.14 3.4E-05 c 1.1E-04 c 6.4E-07 c 3.2E-06 c 5.2E-06 c ~Polychlorinated Biphenyls (high risk) 1336-36-3 2.0E+00 I 5.7E-04 C 1 0.14 2.2E-01 c 7.4E-01 c 4.3E-03 c 2.2E-02 c~Polychlorinated Biphenyls (low risk) 1336-36-3 4.0E-01 I 1.0E-04 I 1 0.14 2.4E-02 c 1.2E-01 c 1.7E-01 c ~Polychlorinated Biphenyls (lowest risk) 1336-36-3 7.0E-02 I 5.7E-04 C 1 0.14 4.3E-03 c 2.2E-02 c~Tetrachlorobiphenyl, 3,3',4,4'- (PCB 77) 32598-13-3 1.3E+01 C 3.8E-03 C 1 0.14 3.4E-02 c 1.1E-01 c 6.4E-04 c 3.2E-03 c 5.2E-03 c ~Tetrachlorobiphenyl, 3,4,4',5- (PCB 81) 70362-50-4 1.3E+01 C 3.8E-03 C 1 0.14 3.4E-02 c 1.1E-01 c 6.4E-04 c 3.2E-03 c 5.2E-03 c Polymeric Methylene Diphenyl Diisocyanate (PMDI) 9016-87-9 6.0E-04 I 1 0.1 8.5E+05 nm 3.6E+06 nm 6.3E-01 n 2.6E+00 nPolynuclear Aromatic Hydrocarbons (PAHs)~Acenaphthene 83-32-9 6.0E-02 I V 1 0.13 3.4E+03 n 3.3E+04 n 2.2E+03 n ~Anthracene 120-12-7 3.0E-01 I V 1 0.13 1.7E+04 n 1.7E+05 nm 1.1E+04 n ~Benz[a]anthracene 56-55-3 7.3E-01 I 1.1E-04 C M 1 0.13 1.5E-01 c 2.1E+00 c 8.7E-03 c 1.1E-01 c 2.9E-02 c ~Benzo[a]pyrene 50-32-8 7.3E+00 I 1.1E-03 C M 1 0.13 1.5E-02 c 2.1E-01 c 8.7E-04 c 1.1E-02 c 2.9E-03 c ~Benzo[b]fluoranthene 205-99-2 7.3E-01 I 1.1E-04 C M 1 0.13 1.5E-01 c 2.1E+00 c 8.7E-03 c 1.1E-01 c 2.9E-02 c ~Benzo[k]fluoranthene 207-08-9 7.3E-02 I 1.1E-04 C M 1 0.13 1.5E+00 c 2.1E+01 c 8.7E-03 c 1.1E-01 c 2.9E-01 c ~Chrysene 218-01-9 7.3E-03 I 1.1E-05 C M 1 0.13 1.5E+01 c 2.1E+02 c 8.7E-02 c 1.1E+00 c 2.9E+00 c ~Dibenz[a,h]anthracene 53-70-3 7.3E+00 I 1.2E-03 C M 1 0.13 1.5E-02 c 2.1E-01 c 8.0E-04 c 1.0E-02 c 2.9E-03 c ~Dimethylbenz(a)anthracene, 7,12- 57-97-6 2.5E+02 C 7.1E-02 C 1 0.13 1.8E-03 c 6.2E-03 c 3.4E-05 c 1.7E-04 c 2.7E-04 c ~Fluoranthene 206-44-0 4.0E-02 I 1 0.13 2.3E+03 n 2.2E+04 n 1.5E+03 n ~Fluorene 86-73-7 4.0E-02 I V 1 0.13 2.3E+03 n 2.2E+04 n 1.5E+03 n ~Indeno[1,2,3-cd]pyrene 193-39-5 7.3E-01 I 1.1E-04 C M 1 0.13 1.5E-01 c 2.1E+00 c 8.7E-03 c 1.1E-01 c 2.9E-02 c ~Methylnaphthalene, 1- 90-12-0 2.9E-02 P 7.0E-02 A V 1 4.6E+02 2.2E+01 c 9.9E+01 c 2.3E+00 c ~Methylnaphthalene, 2- 91-57-6 4.0E-03 I V 1 4.4E+02 3.1E+02 n 4.1E+03 ns 1.5E+02 n 

Page 7 of 9
Regional Screening Level Table (RSL) Master APRIL 2009 

SFO IUR RfDo RfCi Csat

Residential 

Soil

Industrial 

Soil

Residential 

Air

Industrial 

Air Tapwater 

(mg/kg-day)-1 (ug/m3)-1 (mg/kg-day) (mg/m3) mg/kg mg/kg mg/kg ug/m3 ug/m3 ug/L 

Key: I = IRIS; P = PPRTV; A = ATSDR; C = Cal EPA; H = HEAST; W = WHO; S = see user guide Section 5; L = see user guide on lead; M = mutagen; V = volatile; F = See FAQ #28; c = cancer; * = where: n SL < 100X c SL; ** = where n SL < 10X c SL; 

(See User's Guide); s = Concentration may exceed Csat (See User's Guide); SSL values are bsed on DAF=1

Contaminant Toxicity and Chemical-specific Information Screening Levels 

Analyte CAS No.

key

key

key

key

v

o

c

mutagen key key key GIABS ABS key key

~Naphthalene 91-20-3 3.4E-05 C 2.0E-02 I 3.0E-03 I V 1 0.13 3.9E+00 c* 2.0E+01 c* 7.2E-02 c* 3.6E-01 c* 1.4E-01 c* ~Pyrene 129-00-0 3.0E-02 I V 1 0.13 1.7E+03 n 1.7E+04 n 1.1E+03 n Potassium Perchlorate 7778-74-7 7.0E-04 I 1 5.5E+01 n 7.2E+02 n 2.6E+01 nProchloraz 67747-09-5 1.5E-01 I 9.0E-03 I 1 0.1 3.2E+00 c 1.1E+01 c 4.5E-01 c Profluralin 26399-36-0 6.0E-03 H 1 0.1 3.7E+02 n 3.7E+03 n 2.2E+02 n Prometon 1610-18-0 1.5E-02 I 1 0.1 9.2E+02 n 9.2E+03 n 5.5E+02 n Prometryn 7287-19-6 4.0E-03 I 1 0.1 2.4E+02 n 2.5E+03 n 1.5E+02 n Propachlor 1918-16-7 1.3E-02 I 1 0.1 7.9E+02 n 8.0E+03 n 4.7E+02 n Propanil 709-98-8 5.0E-03 I 1 0.1 3.1E+02 n 3.1E+03 n 1.8E+02 n Propargite 2312-35-8 2.0E-02 I 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Propargyl Alcohol 107-19-7 2.0E-03 I 1 0.1 1.2E+02 n 1.2E+03 n 7.3E+01 n Propazine 139-40-2 2.0E-02 I 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Propham 122-42-9 2.0E-02 I 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Propiconazole 60207-90-1 1.3E-02 I 1 0.1 7.9E+02 n 8.0E+03 n 4.7E+02 n Propionaldehyde 123-38-6 8.0E-03 I V 3.6E+04 8.6E+01 n 3.6E+02 n 8.3E+00 n 3.5E+01 n 1.7E+01 n Propylene Glycol 57-55-6 2.0E+01 P 1 0.1 1.2E+06 nm 1.2E+07 nm 7.3E+05 n Propylene Glycol Dinitrate 6423-43-4 2.7E-04 A V 1 1.4E+03 6.0E+01 n 2.5E+02 n 2.8E-01 n 1.2E+00 n 5.7E-01 n Propylene Glycol Monoethyl Ether 1569-02-4 7.0E-01 H 1 0.1 4.3E+04 n 4.3E+05 nm 2.6E+04 n Propylene Glycol Monomethyl Ether 107-98-2 7.0E-01 H 2.0E+00 I 1 0.1 4.3E+04 n 4.3E+05 nm 2.1E+03 n 8.8E+03 n 2.6E+04 n Propylene Oxide 75-56-9 2.4E-01 I 3.7E-06 I 3.0E-02 I V 1 6.8E+04 1.9E+00 c 8.7E+00 c 6.6E-01 c* 3.3E+00 c* 2.3E-01 c Pursuit 81335-77-5 2.5E-01 I 1 0.1 1.5E+04 n 1.5E+05 nm 9.1E+03 n Pydrin 51630-58-1 2.5E-02 I 1 0.1 1.5E+03 n 1.5E+04 n 9.1E+02 n Pyridine 110-86-1 1.0E-03 I V 1 3.0E+05 7.8E+01 n 1.0E+03 n 3.7E+01 n Quinalphos 13593-03-8 5.0E-04 I 1 0.1 3.1E+01 n 3.1E+02 n 1.8E+01 n Quinoline 91-22-5 3.0E+00 I 1 0.1 1.6E-01 c 5.7E-01 c 2.2E-02 c Refractory Ceramic Fibers NA 3.0E-02 A 1 4.3E+07 nm 1.8E+08 nm 3.1E+01 n 1.3E+02 nResmethrin 10453-86-8 3.0E-02 I 1 0.1 1.8E+03 n 1.8E+04 n 1.1E+03 n Ronnel 299-84-3 5.0E-02 H 1 0.1 3.1E+03 n 3.1E+04 n 1.8E+03 n Rotenone 83-79-4 4.0E-03 I 1 0.1 2.4E+02 n 2.5E+03 n 1.5E+02 n Safrole 94-59-7 2.2E-01 C 6.3E-05 C 1 0.1 2.2E+00 c 7.8E+00 c 3.9E-02 c 1.9E-01 c 3.1E-01 c Savey 78587-05-0 2.5E-02 I 1 0.1 1.5E+03 n 1.5E+04 n 9.1E+02 n Selenious Acid 7783-00-8 5.0E-03 I 1 3.9E+02 n 5.1E+03 n 1.8E+02 nSelenium 7782-49-2 5.0E-03 I 2.0E-02 C 1 3.9E+02 n 5.1E+03 n 2.1E+01 n 8.8E+01 n 1.8E+02 n Selenourea 630-10-4 5.0E-03 H 1 0.1 3.1E+02 n 3.1E+03 n 1.8E+02 nSethoxydim 74051-80-2 9.0E-02 I 1 0.1 5.5E+03 n 5.5E+04 n 3.3E+03 n Silver 7440-22-4 5.0E-03 I 0.04 3.9E+02 n 5.1E+03 n 1.8E+02 n Simazine 122-34-9 1.2E-01 H 5.0E-03 I 1 0.1 4.0E+00 c* 1.4E+01 c 5.6E-01 c Sodium Acifluorfen 62476-59-9 1.3E-02 I 1 0.1 7.9E+02 n 8.0E+03 n 4.7E+02 n Sodium Azide 26628-22-8 4.0E-03 I 1 3.1E+02 n 4.1E+03 n 1.5E+02 nSodium Diethyldithiocarbamate 148-18-5 2.7E-01 H 3.0E-02 I 1 0.1 1.8E+00 c 6.4E+00 c 2.5E-01 cSodium Fluoride 7681-49-4 5.0E-02 A 1 3.9E+03 n 5.1E+04 n 1.8E+03 nSodium Fluoroacetate 62-74-8 2.0E-05 I 1 0.1 1.2E+00 n 1.2E+01 n 7.3E-01 n Sodium Metavanadate 13718-26-8 1.0E-03 H 1 7.8E+01 n 1.0E+03 n 3.7E+01 nSodium Perchlorate 7601-89-0 7.0E-04 I 1 5.5E+01 n 7.2E+02 n 2.6E+01 nStirofos (Tetrachlorovinphos) 961-11-5 2.4E-02 H 3.0E-02 I 1 0.1 2.0E+01 c* 7.2E+01 c 2.8E+00 c Strontium, Stable 7440-24-6 6.0E-01 I 1 4.7E+04 n 6.1E+05 nm 2.2E+04 n Strychnine 57-24-9 3.0E-04 I 1 0.1 1.8E+01 n 1.8E+02 n 1.1E+01 n Styrene 100-42-5 2.0E-01 I 1.0E+00 I V 1 1.0E+03 6.5E+03 ns 3.8E+04 ns 1.0E+03 n 4.4E+03 n 1.6E+03 n Sulfonylbis(4-chlorobenzene), 1,1'- 80-07-9 5.0E-03 P 1 0.1 3.1E+02 n 3.1E+03 n 1.8E+02 n Systhane 88671-89-0 2.5E-02 I 1 0.1 1.5E+03 n 1.5E+04 n 9.1E+02 n TCMTB 21564-17-0 3.0E-02 H 1 0.1 1.8E+03 n 1.8E+04 n 1.1E+03 n Tebuthiuron 34014-18-1 7.0E-02 I 1 0.1 4.3E+03 n 4.3E+04 n 2.6E+03 n Temephos 3383-96-8 2.0E-02 H 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Terbacil 5902-51-2 1.3E-02 I 1 0.1 7.9E+02 n 8.0E+03 n 4.7E+02 n Terbufos 13071-79-9 2.5E-05 H 1 0.1 1.5E+00 n 1.5E+01 n 9.1E-01 n Terbutryn 886-50-0 1.0E-03 I 1 0.1 6.1E+01 n 6.2E+02 n 3.7E+01 n Tetrabromodiphenyl ether, 2,2',4,4'- (BDE-47) 5436-43-1 1.0E-04 I 7.8E+00 n 1.0E+02 n 3.7E+00 nTetrachlorobenzene, 1,2,4,5- 95-94-3 3.0E-04 I 1 0.1 1.8E+01 n 1.8E+02 n 1.1E+01 n Tetrachloroethane, 1,1,1,2- 630-20-6 2.6E-02 I 7.4E-06 I 3.0E-02 I V 1 7.5E+02 2.0E+00 c 9.8E+00 c 3.3E-01 c 1.7E+00 c 5.2E-01 c Tetrachloroethane, 1,1,2,2- 79-34-5 2.0E-01 I 5.8E-05 I 4.0E-03 P V 1 2.1E+03 5.9E-01 c 2.9E+00 c 4.2E-02 c 2.1E-01 c 6.7E-02 c Tetrachloroethylene 127-18-4 5.4E-01 C 5.9E-06 C 1.0E-02 I 2.7E-01 A V 1 1.8E+02 5.7E-01 c 2.7E+00 c 4.1E-01 c 2.1E+00 c 1.1E-01 c Tetrachlorophenol, 2,3,4,6- 58-90-2 3.0E-02 I 1 0.1 1.8E+03 n 1.8E+04 n 1.1E+03 n Tetrachlorotoluene, p- alpha, alpha, alpha- 5216-25-1 2.0E+01 H 1 0.1 2.4E-02 c 8.6E-02 c 3.4E-03 c Tetraethyl Dithiopyrophosphate 3689-24-5 5.0E-04 I 1 0.1 3.1E+01 n 3.1E+02 n 1.8E+01 n Tetrafluoroethane, 1,1,1,2- 811-97-2 8.0E+01 I V 1 8.2E+02 1.1E+05 nms 4.7E+05 nms 8.3E+04 n 3.5E+05 n 1.7E+05 n Tetryl (Trinitrophenylmethylnitramine) 479-45-8 4.0E-03 P 1 0.1 2.4E+02 n 2.5E+03 n 1.5E+02 n Thallium (I) Nitrate 10102-45-1 9.0E-05 I 1 7.0E+00 n 9.2E+01 n 3.3E+00 nThallium (Soluble Salts) 7440-28-0 6.5E-05 I 1 5.1E+00 n 6.6E+01 n 2.4E+00 n Thallium Acetate 563-68-8 9.0E-05 I 1 7.0E+00 n 9.2E+01 n 3.3E+00 nThallium Carbonate 6533-73-9 8.0E-05 I 1 6.3E+00 n 8.2E+01 n 2.9E+00 nThallium Chloride 7791-12-0 8.0E-05 I 1 6.3E+00 n 8.2E+01 n 2.9E+00 nThallium Sulfate 7446-18-6 8.0E-05 I 1 6.3E+00 n 8.2E+01 n 2.9E+00 nThiobencarb 28249-77-6 1.0E-02 I 1 0.1 6.1E+02 n 6.2E+03 n 3.7E+02 n Thiofanox 39196-18-4 3.0E-04 H 1 0.1 1.8E+01 n 1.8E+02 n 1.1E+01 n Thiophanate, Methyl 23564-05-8 8.0E-02 I 1 0.1 4.9E+03 n 4.9E+04 n 2.9E+03 n Thiram 137-26-8 5.0E-03 I 1 0.1 3.1E+02 n 3.1E+03 n 1.8E+02 n Tin 7440-31-5 6.0E-01 H 1 4.7E+04 n 6.1E+05 nm 2.2E+04 n 

Page 8 of 9
Regional Screening Level Table (RSL) Master APRIL 2009 

SFO IUR RfDo RfCi Csat

Residential 

Soil

Industrial 

Soil

Residential 

Air

Industrial 

Air Tapwater 

(mg/kg-day)-1 (ug/m3)-1 (mg/kg-day) (mg/m3) mg/kg mg/kg mg/kg ug/m3 ug/m3 ug/L 

Key: I = IRIS; P = PPRTV; A = ATSDR; C = Cal EPA; H = HEAST; W = WHO; S = see user guide Section 5; L = see user guide on lead; M = mutagen; V = volatile; F = See FAQ #28; c = cancer; * = where: n SL < 100X c SL; ** = where n SL < 10X c SL; 

(See User's Guide); s = Concentration may exceed Csat (See User's Guide); SSL values are bsed on DAF=1

Contaminant Toxicity and Chemical-specific Information Screening Levels 

Analyte CAS No.

key

key

key

key

v

o

c

mutagen key key key GIABS ABS key key

Titanium Tetrachloride 7550-45-0 1.0E-04 A 1 1.4E+05 nm 6.0E+05 nm 1.0E-01 n 4.4E-01 nToluene 108-88-3 8.0E-02 I 5.0E+00 I V 1 9.3E+02 5.0E+03 ns 4.6E+04 ns 5.2E+03 n 2.2E+04 n 2.3E+03 n Toluene diisocyanate mixture (TDI) 26471-62-5 3.9E-02 C 1.1E-05 C 7.0E-05 I V 1 2.1E+03 1.5E+01 c** 6.7E+01 c** 7.3E-02 n 3.1E-01 n 1.5E-01 n Toluene-2,4-diamine 95-80-7 3.8E+00 C 1.1E-03 C 1 0.1 1.3E-01 c 4.5E-01 c 2.2E-03 c 1.1E-02 c 1.8E-02 c Toluene-2,5-diamine 95-70-5 6.0E-01 H 1 0.1 3.7E+04 n 3.7E+05 nm 2.2E+04 n Toluene-2,6-diamine 823-40-5 3.0E-02 P 1 0.1 1.8E+03 n 1.8E+04 n 1.1E+03 n Toluidine, o- (Methylaniline, 2-) 95-53-4 1.8E-01 C 5.1E-05 C 1 0.1 2.7E+00 c 9.6E+00 c 4.8E-02 c 2.4E-01 c 3.7E-01 c Toluidine, p- 106-49-0 1.9E-01 H 1 0.1 2.6E+00 c 9.1E+00 c 3.5E-01 c Toxaphene 8001-35-2 1.1E+00 I 3.2E-04 I 1 0.1 4.4E-01 c 1.6E+00 c 7.6E-03 c 3.8E-02 c 6.1E-02 c Tralomethrin 66841-25-6 7.5E-03 I 1 0.1 4.6E+02 n 4.6E+03 n 2.7E+02 n Tri-n-butyltin 688-73-3 3.0E-04 A 1 0.1 1.8E+01 n 1.8E+02 n 1.1E+01 n Triallate 2303-17-5 1.3E-02 I 1 0.1 7.9E+02 n 8.0E+03 n 4.7E+02 n Triasulfuron 82097-50-5 1.0E-02 I 1 0.1 6.1E+02 n 6.2E+03 n 3.7E+02 n Tribromobenzene, 1,2,4- 615-54-3 5.0E-03 I 1 0.1 3.1E+02 n 3.1E+03 n 1.8E+02 n Tributyl Phosphate 126-73-8 9.2E-03 P 2.0E-01 P 1 0.1 5.3E+01 c 1.9E+02 c 7.3E+00 c Tributyltin Compounds NA 3.0E-04 P 1 0.1 1.8E+01 n 1.8E+02 n 1.1E+01 nTributyltin Oxide 56-35-9 3.0E-04 I 1 0.1 1.8E+01 n 1.8E+02 n 1.1E+01 n Trichloro-1,2,2-trifluoroethane, 1,1,2- 76-13-1 3.0E+01 I 3.0E+01 H V 1 9.4E+02 4.3E+04 ns 1.8E+05 nms 3.1E+04 n 1.3E+05 n 5.9E+04 n Trichloroaniline HCl, 2,4,6- 33663-50-2 2.9E-02 H 1 0.1 1.7E+01 c 5.9E+01 c 2.3E+00 c Trichloroaniline, 2,4,6- 634-93-5 3.4E-02 H 1 0.1 1.4E+01 c 5.1E+01 c 2.0E+00 c Trichlorobenzene, 1,2,4- 120-82-1 3.6E-03 C 1.0E-02 I 4.0E-03 P V 1 2.2E+02 8.7E+01 n 4.0E+02 ns 4.2E+00 n 1.8E+01 n 8.2E+00 n Trichloroethane, 1,1,1- 71-55-6 2.0E+00 I 5.0E+00 I V 1 6.8E+02 9.0E+03 ns 3.9E+04 ns 5.2E+03 n 2.2E+04 n 9.1E+03 n Trichloroethane, 1,1,2- 79-00-5 5.7E-02 I 1.6E-05 I 4.0E-03 I V 1 5.6E+02 1.1E+00 c 5.5E+00 c 1.5E-01 c 7.7E-01 c 2.4E-01 c Trichloroethylene 79-01-6 1.3E-02 C 2.0E-06 C V 1 7.5E+02 2.8E+00 c 1.4E+01 c 1.2E+00 c 6.1E+00 c 1.7E+00 c Trichlorofluoromethane 75-69-4 3.0E-01 I 7.0E-01 H V 1 1.3E+03 8.0E+02 n 3.4E+03 ns 7.3E+02 n 3.1E+03 n 1.3E+03 n Trichlorophenol, 2,4,5- 95-95-4 1.0E-01 I 1 0.1 6.1E+03 n 6.2E+04 n 3.7E+03 n Trichlorophenol, 2,4,6- 88-06-2 1.1E-02 I 3.1E-06 I 1.0E-03 P 1 0.1 4.4E+01 c** 1.6E+02 c** 7.8E-01 c 4.0E+00 c 6.1E+00 c** Trichlorophenoxy) Propionic Acid, 2(2,4,5- 93-72-1 8.0E-03 I 1 0.1 4.9E+02 n 4.9E+03 n 2.9E+02 n Trichlorophenoxyacetic Acid, 2,4,5- 93-76-5 1.0E-02 I 1 0.1 6.1E+02 n 6.2E+03 n 3.7E+02 n Trichloropropane, 1,1,2- 598-77-6 5.0E-03 I V 1 1.4E+03 3.9E+02 n 5.1E+03 ns 1.8E+02 n Trichloropropane, 1,2,3- 96-18-4 7.0E+00 H 6.0E-03 I V 1 1.6E+03 9.1E-02 c 4.1E-01 c 9.6E-03 c Trichloropropene, 1,2,3- 96-19-5 1.0E-02 P 1.0E-03 P V 1 3.4E+02 2.7E+00 n 1.2E+01 n 1.0E+00 n 4.4E+00 n 2.1E+00 n Tridiphane 58138-08-2 3.0E-03 I 1 0.1 1.8E+02 n 1.8E+03 n 1.1E+02 n Triethylamine 121-44-8 7.0E-03 I V 1 5.5E+04 1.7E+02 n 7.1E+02 n 7.3E+00 n 3.1E+01 n 1.5E+01 n Trifluralin 1582-09-8 7.7E-03 I 7.5E-03 I 1 0.1 6.3E+01 c** 2.2E+02 c* 8.7E+00 c* Trimethyl Phosphate 512-56-1 3.7E-02 H 1 0.1 1.3E+01 c 4.7E+01 c 1.8E+00 c Trimethylbenzene, 1,2,4- 95-63-6 7.0E-03 P V 1 2.5E+02 6.7E+01 n 2.8E+02 ns 7.3E+00 n 3.1E+01 n 1.5E+01 n Trimethylbenzene, 1,3,5- 108-67-8 5.0E-02 P 6.0E-03 P V 1 2.1E+02 4.7E+01 n 2.0E+02 n 6.3E+00 n 2.6E+01 n 1.2E+01 n Trinitrobenzene, 1,3,5- 99-35-4 3.0E-02 I 1 0.019 2.2E+03 n 2.7E+04 n 1.1E+03 n Trinitrotoluene, 2,4,6- 118-96-7 3.0E-02 I 5.0E-04 I 1 0.032 1.9E+01 c** 7.9E+01 c** 2.2E+00 c** Triphenylphosphine Oxide 791-28-6 2.0E-02 P 1 0.1 1.2E+03 n 1.2E+04 n 7.3E+02 n Tris(2-chloroethyl)phosphate 115-96-8 1.4E-02 P 3.0E-01 P 1 0.1 3.5E+01 c 1.2E+02 c 4.8E+00 c Tris(2-ethylhexyl)phosphate 78-42-2 3.2E-03 P 1.0E-01 P 1 0.1 1.5E+02 c* 5.4E+02 c 2.1E+01 c Uranium (Soluble Salts) NA 3.0E-03 I 3.0E-04 A 1 2.3E+02 n 3.1E+03 n 3.1E-01 n 1.3E+00 n 1.1E+02 n Vanadium Pentoxide 1314-62-1 8.3E-03 P 9.0E-03 I 7.0E-06 P 0.026 4.0E+02 c** 2.0E+03 c** 2.9E-04 c* 1.5E-03 c* 3.3E+02 nVanadium Sulfate 36907-42-3 2.0E-02 H 0.026 1.6E+03 n 2.0E+04 n 7.3E+02 nVanadium and Compounds NA 5.0E-03 I 1 3.9E+02 n 5.2E+03 n 1.8E+02 n Vanadium, Metallic 7440-62-2 7.0E-03 H 0.026 5.5E+02 n 7.2E+03 n 2.6E+02 n Vernolate 1929-77-7 1.0E-03 I 1 0.1 6.1E+01 n 6.2E+02 n 3.7E+01 n Vinclozolin 50471-44-8 2.5E-02 I 1 0.1 1.5E+03 n 1.5E+04 n 9.1E+02 n Vinyl Acetate 108-05-4 1.0E+00 H 2.0E-01 I V 1 2.8E+03 9.9E+02 n 4.2E+03 ns 2.1E+02 n 8.8E+02 n 4.1E+02 n Vinyl Bromide 593-60-2 3.2E-05 H 3.0E-03 I V 1 1.7E+03 1.1E-01 c* 5.8E-01 c* 7.6E-02 c* 3.8E-01 c* 1.5E-01 c* Vinyl Chloride 75-01-4 7.2E-01 I 4.4E-06 I 3.0E-03 I 1.0E-01 I V M 1 4.0E+03 6.0E-02 c 1.7E+00 c 1.6E-01 c 2.8E+00 c 1.6E-02 c Warfarin 81-81-2 3.0E-04 I 1 0.1 1.8E+01 n 1.8E+02 n 1.1E+01 n Xylene, Mixture 1330-20-7 2.0E-01 I 1.0E-01 I V 1 3.0E+02 6.0E+02 ns 2.6E+03 ns 1.0E+02 n 4.4E+02 n 2.0E+02 n Xylene, P- 106-42-3 7.0E-01 C V 1 4.5E+02 4.7E+03 ns 2.0E+04 ns 7.3E+02 n 3.1E+03 n 1.5E+03 n Xylene, m- 108-38-3 2.0E+00 H 7.0E-01 C V 1 4.4E+02 4.5E+03 ns 1.9E+04 ns 7.3E+02 n 3.1E+03 n 1.4E+03 n Xylene, o- 95-47-6 2.0E+00 H 7.0E-01 C V 1 3.0E+02 5.3E+03 ns 2.3E+04 ns 7.3E+02 n 3.1E+03 n 1.4E+03 n Zinc (Metallic) 7440-66-6 3.0E-01 I 1 2.3E+04 n 3.1E+05 nm 1.1E+04 n Zinc Phosphide 1314-84-7 3.0E-04 I 1 2.3E+01 n 3.1E+02 n 1.1E+01 nZineb 12122-67-7 5.0E-02 I 1 0.1 3.1E+03 n 3.1E+04 n 1.8E+03 n 

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