The extraction process takes 18 hours. TDS TDS is an acronym for Total Dissolved Solids or filterable residue. TPH TPH is an acronym for Total Petroleum Hydrocarbons . TTLC TTLC is an acronym for Total Threshold Limit Concentration and is used in the quantification of the presence of metals. In correct scientific terms TTLC refers to the soil concentration limits as defined in CCR Title 22.
L is an acronym for micrograms per liter .
It is normally used in conjunction with aqueous samples. VOAs VOA is an acronym for Volatile Organic Analyte . VOA vials refer to the 40 ml containers used for aqueous sampling. VOCs VOC is an acronym for Volatile Organic Compound . The term VOCs commonly refers to the list of compounds contained in EPA Method 8240 or the longer list of EPA Method 8260.