Each character twice: written as an HTML code, and typed directly. If the two columns match, the character survived the upload.
| Code | Character | As HTML code | Typed directly |
|---|---|---|---|
| Plain ASCII (the house rule) | |||
| A1 | Straight double quote (inches) | ["] | ["] |
| A2 | Straight apostrophe (feet) | ['] | ['] |
| A3 | Ampersand | Tom & Jerry | Tom & Jerry |
| A4 | Comma | [,] | [,] |
| In the site's character set (ISO-8859-1) | |||
| B1 | Degree sign | [°] | [°] |
| B2 | Registered sign | [®] | [®] |
| B3 | One half | [½] | [½] |
| B4 | One quarter | [¼] | [¼] |
| B5 | Multiplication sign | [×] | [×] |
| B6 | Accented e | [é] | [é] |
| Windows-only (Word's smart punctuation) | |||
| C1 | Trademark sign | [™] | [™] |
| C2 | Left curly double quote | [“] | [“] |
| C3 | Right curly double quote | [”] | [”] |
| C4 | Left curly single quote | [‘] | [‘] |
| C5 | Right curly single quote | [’] | [’] |
| C6 | En dash | [–] | [–] |
| C7 | Em dash | [—] | [—] |
| C8 | Ellipsis | […] | […] |
| C9 | Bullet | [•] | [•] |
| Outside both character sets | |||
| D1 | Double prime (inches) | [″] | ["] |
| D2 | Ring above (used as degree) | [˚] | [°] |
| D3 | Full-width plus | [+] | [+] |
| D4 | Check mark | [✓] | [?] |
"Caution Buried Geothermal Line Below" detectable underground marking tape provides buried pipeline detection and identification of utility infrastructure. Detectable tapes can protect against costly damage to underground pipelines. The tape consists of .35 mil of solid aluminum foil encased between two layers of polyethylene plastic (3.75 mil combined). A .90 mil clear protective film protects the printed message while allowing a full view of both the foil and printed message. The aluminum foil is visible from both sides of the tape and provides ease in detecting utility lines utilizing either a conductive or inductive method with utility locate equipment.
| Thickness | 5 mil |
| Foil core thickness | 0.35 mil |
| Tensile | 15,000 PSI |
| Density | 1.09 g/cm3 |
Click a legend to see that tape.
| Color | Utility Line |
|---|---|
| White | Proposed Excavation |
| Pink | Temporary Survey Markings |
| Red | Electrical Power Lines, Cables, Conduit and Lighting Cables |
| Yellow | Gas, Oil, Steam, Petroleum or Gaseous Materials |
| Orange | Communication, Alarm or Signal Lines, Cables or Conduit |
| Blue | Potable Water |
| Brown | Non-Potable Water and Force Main Lines |
| Purple | Reclaimed Water, Irrigation and Slurry Lines |
| Green | Sewer and Drain Lines |
The American Public Works Association, a non-profit professional association, created a uniform color code for utility companies, both public and private. The colors have become the marking standard across all industries.