14.36.070 Determination of wellhead protection areas and critical aquifer recharge areas.
A. Wellhead protection areas (WHPAs) for water supply wells are delineated by the city using a numerical computer groundwater model that is calibrated with current information on local hydrogeological properties and pumping characteristics at each city well. The WHPAs consist of time-based capture zones for one-year, five-year, and ten-year times of travel and may include additional management areas to account for uncertainty in the modeling or for areas where WHPAs for two or more sources overlap.
B. Critical aquifer recharge areas are determined by the soil series and types present, as listed below:
CATEGORY I SOIL SERIES |
|
---|---|
Series Name |
SCS Map Symbol # |
Baldhill |
5, 6, 7, 8 |
Cagey |
20 |
Everett |
32, 33, 34, 35 |
Grove |
42 |
Indianola |
46, 47, 48 |
Newberg |
71, 72 |
Nisqually |
73, 74 |
Pilchuck |
84 |
Pits, gravel |
85 |
Puyallup |
89 |
Spanaway |
110, 111, 112, 113, 114 |
Sultan |
115 |
Tenino |
117, 118, 119 |
CATEGORY II SOIL SERIES |
|
Series Name |
SCS Map Symbol # |
Alderwood |
1, 2, 3, 4 |
Chehalis |
26 |
Delphi |
27, 28 |
Eld |
31 |
Giles |
38, 39, 40 |
Maytown |
64 |
Spana |
109 |
Yelm |
126, 127, 128 |
CATEGORY III SOIL SERIES |
|
Series Name |
SCS Map Symbol # |
Bellingham |
14 |
Dupont |
29 |
Everson |
36 |
Galvin |
37 |
Godfrey |
41 |
Hoogdal |
43, 44 |
Kapowsin |
50, 51, 52, 53, 54, 55 |
Mashel |
62, 63 |
McKenna |
65 |
Mukilteo |
69, 70 |
Norma |
75, 76 |
Puget |
88 |
Scammen |
100, 101 |
Semiamoo |
104 |
Shalkar |
105 |
Shalkar Variant |
106 |
Skipopa |
107, 108 |
Tacoma |
116 |
Tisch |
120 |
C. The exact presence and location of soils constituting a critical aquifer recharge area shall be determined by a field investigation applying specific criteria described by the health officer or health expert. A professional soil scientist or licensed hydrogeologist expert shall perform soils analysis necessary to make determinations. Hiring the services of a soil scientist or licensed hydrogeologist expert shall be the responsibility of the applicant. The applicant is required under LMC 14.36.100 to show the location of the aquifer sensitive area on a scaled drawing as a part of the application.
D. Disputed Areas.
1. In cases of disputed soil series, or series boundary, and resulting category, the city of Lacey in consultation with the health officer, and the Natural Resources Conservation Service, shall determine the category.
2. In the event the changes are contested by the applicant, the city of Lacey shall, at the applicant’s expense, obtain its own expert services to render a final determination.
3. In areas that have been disturbed or the surface soil removed as in gravel pits, the city of Lacey in consultation with the health officer and the Natural Resources Conservation Service shall determine the most appropriate category with geological and hydrological information. (Ord. 1505 §44 (part), 2017).