| PARLABEL | NAME | CAS NUMBER |
|---|---|---|
| PYRD10 | Pyrene-d10 | 1718-52-1 |
| PYRDN | Pyridine | 110-86-1 |
| PYRIMETHANIL | Pyrimethanil | 53112-28-0 |
| PYRUVICACID | Pyruvic Acid | 127-17-3 |
| QUINCLORAC | Quinclorac | 84087-01-4 |
| QUINICA | Quinic acid | 77-95-2 |
| QUINO | Quinoline | 91-22-5 |
| QUPHOS | Quinalphos | 13593-03-8 |
| R143A | 1,1,1-Trifluoroethane | 420-46-2 |
| RA | Radium | 7440-14-4 |
| RA-223 | Radium-223 | 15623-45-7 |
| RA-224 | Radium-224 | 13233-32-4 |
| RA-225 | Radium-225 | 13981-53-8 |
| RA-226 | Radium-226 | 13982-63-3 |
| RA-228 | Radium-228 | 15262-20-1 |
| RA226228 | Radium-226 and Radium-228 | NA |
| RADIOACT | Radioactivity | NA |
| RADISO | Radioactive Isotopes | NA |
| RAINBOWTR | Oncorhynchus mykiss (Rainbow Trout) | NA |
| RAINFALL | Rainfall | NA |
| RB | Rubidium | 7440-17-7 |
| RDX | Hexahydro-1,3,5-trinitro-1,3,5-triazine | 121-82-4 |
| RE-188 | Rhenium-188 | 14378-26-8 |
| RECEFFRAT | Receiving Water to Effluent Flow Ratio | NA |
| RECN | Reactive Cyanide | NA |
| REDOX | Oxidation-Reduction Potential | NA |
| RESIST | Resistivity | NA |
| RESMETHRIN | Resmethrin | 10453-86-8 |
| RH | Rhodium | 7440-16-6 |
| RIVDIRECT | River Direction ( PARVAL - Upstream = 1; Downstream = -1) | NA |
| RN | Radon | 10043-92-2 |
| RN-219 | Radon-219 | 14835-02-0 |
| RN-222 | Radon-222 | 14859-67-7 |
| RONNEL | Ronnel | 299-84-3 |
| ROTENONE | Rotenone | 83-79-4 |
| RRO | Residual Range Organics | NA |
| RROALIPHATIC | Residual Range Organics, Aliphatic | NA |
| RROAROMATIC | Residual Range Organics, Aromatic | NA |
| RROC25C36 | Residual Range Organics (C25-C36) | NA |
| RROC28C40 | Residual Range Organics (C28-C40) | NA |
| RU | Ruthenium | 7440-18-8 |
| RU-103 | Ruthenium-103 | 13968-53-1 |
| RU-105 | Ruthenium-105 | 14331-95-4 |
| RU-106 | Ruthenium-106 | 13967-48-1 |
| S | Sulfide | 18496-25-8 |
| S-35 | Sulfur-35 | 15117-53-0 |
| S10METHYLDI | S10-Methyldiacholestane | NA |
| S11METHYLDI | S11-Methyldiacholestane | NA |
| S12CHOLESTA | S12-Cholestane | NA |
| S14CHOLE-20R | S14-Cholestane(20R) | NA |
| S15CHOLE-20S | S15-Cholestane(20S) | NA |
| S18ETHYLDIA | S18-Ethyldiacholestane | NA |
| S19ETHYLDIA | S19-Ethyldiacholestane | NA |
| S20METHYLCH | S20-Methylcholestane | NA |
| S22METHY-20R | S22-Methylcholestane(20R) | NA |
| S23METHY-20S | S23-Methylcholestane(20S) | NA |
| S24METHYLCH | S24-MethylCholestane | NA |
| S25ETHYLCHO | S25-EthylCholestane | NA |
| S26ETHY-20R | S26-Ethylcholestane(20R) | NA |
| S27ETHY-20S | S27-Ethylcholestane(20S) | NA |
| S28ETHYLCHO | S28-Ethylcholestane | NA |
| S34S32SO4 | S-34/S-32 in sulfate | NA |
| S4DIACHOLES | S4-Diacholestane | NA |
| S5DIACHOLES | S5-Diacholestane | NA |
| S6DIACHOLES | S6-Diacholestane | NA |
| S7DIACHOLES | S7-Diacholestane | NA |
| S8METHYLDIA | S8-Methyldiacholestane | NA |
| SAFROLE | Safrole | 94-59-7 |
| SALCHL | Salinity, from Chlorosity | NA |
| SALICYLIC | Salicylic acid | 69-72-7 |
| SALINITY | Salinity | NA |
| SALMONELLA | Salmonella | NA |
| SALNACL | Salinity, Calc. NaCl | NA |
| SAMPDEP | Sample Depth | NA |
| SAND | Sand | NA |
| SAR | Sodium Adsorption Ratio | NA |
| SAVEY | Savey | 78587-05-0 |
| SB | Antimony | 7440-36-0 |
| SB-122 | Antimony-122 | 14374-79-9 |
| SB-124 | Antimony-124 | 14683-10-4 |
| SB-125 | Antimony-125 | 14234-35-6 |
| SBOD | Soluble Biochemical Oxygen Demand (BOD) | NA |
| SBVCC | Solventborne Volatile Coating Content | NA |
| SC | Specific Conductance | NA |
| SCANDIUM | Scandium | 7440-20-2 |
| SCN | Thiocyanate | 463-56-9 |
| SCOD | Soluble Chemical Oxygen Demand (COD) | NA |
| SDSI | Stiff Davis Stability Index | NA |
| SE | Selenium | 7782-49-2 |
| SE-75 | Selenium-75 | 14265-71-5 |
| SE4 | Selenite | 14124-67-5 |
| SE6 | Selenate | 14124-68-6 |
| SEACID | Selenious Acid | 7783-00-8 |
| SECN | Selenocyanate | 5749-48-4 |
| SEM | Simultaneously Extracted Metals (Cd, Cu, Pb, Hg, Ni, and Zn) | NA |
| SEM/AVS | Simultaneously Extractable Metals/Acid Volatile Sulfide Ratio | NA |
| SETHDIM | Sethoxydim | 74051-80-2 |
| SETMAT | Settleable Matter | NA |
| SETMATDEP | Settleable Matter Depth | NA |
| SETRES | Settleable Residue | NA |