What a Laboratory Test Report Actually Lists for 1,2,3-TCP
Detection vs. Quantification
A lab report typically specifies if 1,2,3-trichloropropane (TCP) was detected above a reporting level, such as 0.03 micrograms per liter (µg/L or parts per billion, ppb), without implying safety or compliance status. This threshold guides whether the measurement is quantitatively reported or recorded as below detection.
Measurement Units
Results are expressed in micrograms per liter, equivalently parts per billion, helping contextualize the concentration but not establishing any violation or risk by itself.
Granular Activated Carbon Contact Time: Why Bed Depth Matters More for TCP Than for Taste
Effectiveness Linked to Contact Time
The ability of granular activated carbon to reduce chlorinated solvents like TCP depends strongly on contact time, which relates directly to the depth of the carbon bed and flow rate through it. Longer contact time increases treatment potential.
Taste Vs. Chemical Removal
Treating aesthetic issues such as taste and odor typically demands less stringent parameters than does treatment targeting TCP, making equipment choice for TCP a distinct consideration.
How Sample Depth, Well Depth, or Source Type Changes What a Reader Should Expect
Surface Water as Source
The Naval Station Washington - Washington Navy Yard public water system relies on surface water. Surface water sources often have different contaminant profiles and variability compared to groundwater, influencing observed TCP levels.
Implications of Sampling Depth
Sampling at different depths—or from varying well designs—can result in differing TCP measurements. Because the public system data encompass multiple points, individual household levels may vary.
What the Reader Should Write Down Before Asking Anyone for Treatment Advice
Water Source Details
Note whether your household water is supplied by the public system or a private well, including any known source type (surface or groundwater).
Recent Water Quality Test Results
Gather recent test reports with 1,2,3-TCP measurements for your specific water to understand your own exposure beyond regional sampling.
Usage Patterns and Water Demand
Record typical daily water use and peak demand, as treatment configurations differ between low and high flow conditions.
What 'Detected', 'Median', and 'Range' Mean in the Sampling Record on This Page
Detected
A detection of 1,2,3-TCP means the constituent was measured at or above the reporting level but does not imply a violation or unsafe condition.
Median and Range
The public system record for Naval Station Washington shows no detected 1,2,3-TCP above 0.03 µg/L in four measurements, indicating all results were below this threshold during the 2014-2015 monitoring period.
How Many Samples and Wells Stand Behind the Figures, and What a Small Sample Means
Sample Size
Only four samples were taken for 1,2,3-TCP during the cited period, serving around 16,800 people through 90 connections in the District Of Columbia County system.
Interpretation Caution
A small number of samples limits statistical confidence. The absence of detection above the reporting level does not necessarily mean zero TCP presence in all homes but reflects the observed data set for the system.
The Household or Facility Symptoms That Do and Do Not Point to This Problem
What Does Not Indicate 1,2,3-TCP
Common water quality complaints like chlorine taste or hardness do not correlate with 1,2,3-trichloropropane presence.
Symptoms That Suggest Testing
If there is concern about chlorinated solvent contamination due to nearby industrial history or well water sources, targeted 1,2,3-TCP testing is advisable to inform treatment needs.
Closing
This checklist references the public water system record for Naval Station Washington - Washington Navy Yard in District Of Columbia County, sourced from the EPA’s Unregulated Contaminant Monitoring Rule data for 2013-2015. To confirm conditions at your residence, individual water testing is necessary. For more detailed information, consult the EPA's database on public water system contaminants.
Among the options for managing 1,2,3-trichloropropane concerns, the Autotrol 1,2,3-TCP Filter provides a documented approach that ships ready to configure for household needs.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2015-09-09. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Naval Station Washington - Washington Navy Yard (DC0000003), DC: 4 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level
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