N.Y. Comp. Codes R. & Regs. tit. 10, § 55-3.9 – Environmental laboratory approval program difficulty factors.

Analyte	Factor
BIOLOGICAL TEST PROCEDURES
Coliform, fecal	0.3
Coliform, Total	0.3
Standard Plate Count	0.3
INORGANIC TEST PROCEDURES
Acidity	0.3
Alkalinity	0.3
Aluminum, Total	0.5
Ammonia (as N)	0.5
Antimony, Total	0.5
Arsenic, Total	0.7
Barium, Total	0.5
Beryllium, Total	0.5
Biochemical Oxygen Demand	0.8
Boron, Total	0.5
Bromide	0.8
Cadmium, Total	0.5
Calcium, Total	0.5
Carbonaceous BOD	0.8
Chemical Oxygen Demand	0.4
Chloride	0.5
Chromium, VI	0.8
Chromium, Total	0.5
Cobalt, Total	0.5
Copper, Total	0.5
Cyanide, Total or amenable to chlorination	0.8
Fluoride, Total	0.5
Gold, Total	0.5
Hardness, Total	0.2
Calcium Hardness	0.2
Hydrogen Ion (pH)	0.1
Iron, Total	0.5
Kjeldahl Nitrogen, Total	0.5
Lead, Total	0.5
Magnesium, Total	0.5
Manganese, Total	0.5
Mercury, Total	0.7
Molybdenum, Total	0.5
Nickel, Total	0.5
Nitrate (as N)	0.5
Nitrite (as N)	0.5
Nitrogen Dioxide	1.5
Nitrogen Oxide	1.5
Oil and Grease, Total Recoverable	0.8
Organic Carbon, Total	0.5
Orthophosphate (as P)	0.5
Palladium, Total	0.5
Percent Sulfur	2.0
Phenols	0.8
Phosphorus, Total	0.5
Platinum, Total	0.5
Potassium, Total	0.5
Selenium, Total	0.7
Silica, Dissolved	0.5
Silver, Total	0.5
Sodium, Total	0.5
Sulfate (as SO₄)	0.5
Sulfide (as S)	0.7
Sulfite (as SO₃)	0.7
Sulfur Dioxide	1.0
Surfactants	0.6
Thallium, Total	0.5
Tin, Total	0.5
Titanium, Total	0.5
Vanadium, Total	0.5
Zinc, Total	0.5
NON-PESTICIDE ORGANIC COMPOUNDS
Acenaphthene	0.5
Acenaphthylene	0.5
Acetone	0.5
Acrolein	0.5
Acrylonitrile	0.5
Anthracene	0.5
Benzene	0.5
Benzidine	0.5
Benzoic Acid	0.5
Benzo (a) anthracene	0.5
Benzo (a) pyrene	0.5
Benzo (b) fluoranthene	0.5
Benzo (ghi) perylene	0.5
Benzo (k) fluoranthene	0.5
Benzyl Alcohol	0.5
Benzyl Chloride	0.5
Benzyl Butyl Phthalate	0.5
Bis (2-chloroethoxy) methane	0.5
Bis (2-chloroethyl) ether	0.5
Bis (2-ethylhexyl) phthalate	0.5
Bromobenzene	0.5
Bromodichloromethane	0.5
Bromoform	0.5
Bromomethane	0.5
4-Bromophenylphenyl ether	0.5
2-Butanone	0.5
n-Butylbenzene	0.5
sec-Butylbenzene	0.5
tert-Butylbenzene	0.5
Carbon Disulfide	0.5
Carbon Tetrachloride	0.5
4-Chloroaniline	0.5
4-Chloro-3-methylphenol	0.5
Chlorobenzene	0.5
Chloroethane	0.5
2-Chloroethylvinyl ether	0.5
Chloroform	0.5
Chloromethane	0.5
2-Chloronaphthalene	0.5
2-Chlorophenol	0.5
4-Chlorophenylphenyl ether	0.5
2-Chlorotoluene	0.5
4-Chlorotoluene	0.5
Chrysene	0.5
Dibenzo (a,h) anthracene	0.5
Dibenzofuran	10.0
Dibromochloromethane	0.5
1,2-Dibromo-3-chloropropane	0.5
1,2 Dibromoethane	0.5
Dibromomethane	0.5
1,2-Dichlorobenzene	0.5
1,3-Dichlorobenzene	0.5
1,4-Dichlorobenzene	0.5
3,3-Dichlorobenzidine	0.5
Dichlorodifluoromethane	0.5
1,1-Dichioroethane	0.5
1,2-Dichloroethane	0.5
1,1-Dichioroethene	0.5
1,2-Dichloroethene (any iosomer or total)	0.5
trans-1,2-Dichloroethene	0.5
2,4.Dichlorophenol	0.5
1,2-Dichloropropane	0.5
1,3-Dichloropropane	0.5
2,2-Dichloropropane	0.5
1,1-Dichloropropene	0.5
cis-1,3-Dichloropropene	0.5
trans-1,3-Dichloropropene	0.5
Diethyl phthalate	0.5
2,4-Dimethyiphenol	0.5
Dimethyl phthalate	0.5
Di-n-butyl phthalate	0.5
Di-n-octyl phthalate	0.5
2,4-Dinitro-2-methylphenol	0.5
2,4-Dinitrophenol	0.5
2,4-Dinitrotoluene	0.5
2,6-Dinitrotoluene	0.5
Epichlorohydrin	0.5
Ethylbenzene	0.5
Ethylene Glycol	0.5
Fluoranthene	0.5
Fluorene	0.5
Formaldehyde	0.8
Hexachlorobenzene	0.5
Hexachlorobutadiene	0.5
Hexachloroethane	0.5
2-Hexanone	0.5
Indeno (1,2,3-cd) pyrene	0.5
Isophorone	0.5
Isopropylbenzene	0.5
p-Isopropyltoluene (p-Cymene)	0.5
2-Methylnaphthalene	0.5
Methylene Chloride	0.5
2-Methyl-4,6-Dinitrophenol	0.5
4-Methyl-2-Pentanone	0.5
2-Methylphenol	0.5
4-Methylphenol	0.5
Naphthalene	0.5
2-Nitroaniline	0.5
3-Nitroaniline	0.5
4-Nitroaniline	0.5
2-Nitrophenol	0.5
Nitrobenzene	0.5
4-Nitrophenol	0.5
N-Nitrosodimethylamine	0.5
N-Nitrosodi-n-propylamine	0.5
N-Nitrosodiphenylamine	0.5
2,2-oxybis (1-chloropropane)	0.5
PCB-1016	0.5
PCB-1221	0.5
PCB-1232	0.5
PCB-1242	0.5
PCB-1248	0.5
PCB-1254	0.5
PCB-1260	0.5
Pentachlorophenol	0.5
Phenanthrene	0.5
Phenol	0.5
n-Propylbenzene	0.5
Pyrene	0.5
Styrene	0.5
2,3,7,8-Tetrachlorodibenzo-p-dioxin	10.0
1,1,2,2-Tetrachloroethane	0.5
Tetrachloroethene	0.5
Toluene	0.5
1,2,3-Trichlorobenzene	0.5
1,2,4-Trichlorobenzene	0.5
1,1,1-Trichloroethane	0.5
1,1,2-Trichloroethane	0.5
Trichloroethene	0.5
Trichlorofluoromethane	0.5
2,4,6-Trichiorophenol	0.5
1,2,3-Trichloropropane	0.5
1,2,4-Trimethylbenzene	0.5
1,3,5-Trimethylbenzene	0.5
Vinyl Acetate	0.5
Vinyl Chloride	0.5
Xylene (any isomer or total)	0.5
PESTICIDES
Aldrin	0.5
Atrazine	0.5
Azinphos Methyl	0.5
alpha-BHC	0.5
beta-BHC	0.5
delta-BHC	0.5
Lindane	0.5
Captan	0.5
Carbaryl	0.5
Chlordane (any)	0.5
2,4-D	0.5
4,4′-DDD	0.5
4,4′-DDE	0.5
4,4′-DDT	0.5
Demeton-O	0.5
Demeton-S	0.5
Diazinon	0.5
Dicamba	0.5
Dichloran	0.5
Dicofol	0.5
Dieldrin	0.5
Disulfoton	0.5
Endosulfan I	0.5
Endosulfan II	0.5
Endosulfan sulfate	0.5
Endrin	0.5
Endrin aldehyde	0.5
Endrin ketone	0.5
Heptachlor	0.5
Heptachlor epoxide	0.5
Isodrin	0.5
Malathion	0.5
Methoxychlor	0.5
Mirex	0.5
Parathion methyl	0.5
Parathion ethyl	0.5
PCNB	0.5
Perthane	0.5
Strobane	0.5
2,4,5-T	0.5
2,4,5-TP (Silvex)	0.5
Toxaphene	0.5
Trifluralin	0.5
PHYSICAL TESTS OR PROCEDURES
Asbestos (PLM)	1.5
Asbestos (TEM)	5.0
Calorific Value (BTU)	1.5
Color	0.3
Density	0.3
E.P. Toxicity (extraction only)	0.3
Fibers	1.5
Ignitability	0.6
Particulates	0.3
Percent Solids	0.3
Percent Water	0.3
Reactivity	0.5
Specific Conductance	0.1
Suspended Particulates	0.3
Temperature	0.1
Total Dissolved Solids	0.3
Total Solids	0.3
Total Suspended Solids	0.3
Volatile Content	0.3
RADIOLOGICAL TEST PROCEDURES
Gross Alpha	0.5
Gross Beta	0.5
Photon Emitters	0.5
Cesium-134	0.5
Iodine-131	0.5
Plutonium	0.5
Radium-226	0.5
Radium-228	0.5
Radon (any method)	0.5
Strontium-89	0.5
Strontium-90	0.5
Tritium	0.5
Uranium	0.5

The Commissioner may grant certification for additional analytes, if necessary for the protection of public health and the environment, assigning a difficulty factor commensurate with similar analytes.