14.36.070 Determination of wellhead protection areas and critical aquifer recharge areas

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:

Critical Aquifer Recharge Area Soil Series
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.

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).