IRRIGATION_TEST_EXAMPLE_-_A71.pdf
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- Attached to
- REQUEST FOR PROPOSAL FOR LANDSCAPE & PARK MAINTENANCE SERVICES FOR SPORTS COMPLEX FACILITY
- Solicitation number
- 2026-RFP-040
- Issued by
- Riverside County, California
About this file
This is a Request for Proposal from the City of Palm Desert, California, for landscape and golf course architectural design services for Desert Willow Golf Resort improvements under RFP 2026-RFP-040. The City seeks qualified landscape or golf course architecture firms to provide professional design services, prepare construction documents, and assist with construction-phase support. The scope of work comprises three primary tasks: preliminary planning and conceptual design (due within six months of project start), construction documents including environmental review and management plans, and bidding and construction support services. Work encompasses enhancements to practice putting greens, bunkers, driving range, practice target greens, cart paths, and related site improvements at both the Desert Willow Golf Academy and the Desert Willow Golf Resort practice tee area. A mandatory pre-proposal meeting is scheduled for July 14, 2026, at 9:00 a.m. via Zoom, with proposals due August 4, 2026. The City intends to complete design within twelve to fifteen months, with construction anticipated in multiple phases during summer construction seasons. The Professional Services Agreement is structured as a three-year term effective September 1, 2026, through June 30, 2029, with City options to renew for up to two additional one-year terms.
The estimated contract value is $100,000 over the three-year professional services agreement term, with the City requesting a lump-sum, not-to-exceed fee proposal and hourly rates for additional work. Proposers must hold a valid California Contractors State License Board (CSLB) license in the C-27 Landscaping Contractor classification and be registered with the California Department of Industrial Relations for public works projects. Prevailing wage requirements apply under California Labor Code sections 1720 and 1770 to this public works project. Evaluation criteria weigh firm qualifications and multidisciplinary experience (20 points), project team and technical expertise (20 points), relevant project experience and quality of work (20 points), project understanding and technical approach (20 points), project schedule and responsiveness (10 points), and cost proposal reasonableness (10 points). Questions are due July 21, 2026, with responses issued by July 28, 2026. Proposals must remain valid for 90 days from the due date. The City reserves the right to reject any or all proposals, negotiate with multiple proposers, and cancel the RFP at any time. Shawn Muir, Community Services Manager, serves as the City's representative.
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Text version
Sample Id : Well Water
IRRIGATION WATER
17-177-0000Report No :
90937Lab Number :
1 of 2Page :
09402Cust No :
Date Printed :
Date Received :
Project :
Example A71 Send to :
SUM OF CATIONS 36.08 SUM OF ANIONS 29.95
Hydrogen Ion Activity
Zinc
Manganese
Equilibrium Reaction
Total Dissolved Solids
Electrical Conductivity
Copper
Molybdenum Mo
Aluminum Al
Fluoride F
Boron B
Iron Fe
Mn
Zn
Cu mg/L = parts per million parts water meq/L - milliequivalents per liter
TDS calculated by ECw * 640
6.9
6.82
2.96
CATIONS mg/L meq/L ANIONS mg/L meq/L
0.01
0.05
0.01
0.19
0.40
0.65
0.100
0.07 mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L
Sodium Na
Calcium Ca
Magnesium Mg
Potassium K
Ammonium
NH 4
NH 4 - N
242 10.53
298 14.87
128 10.53
6 0.15
0 0.00
Chloride Cl 369.00 10.39
Sulfate
SO 4 321 6.69
S 107
Bicarbonate HCO 3 559 9.16
Carbonate CO 3 0 0.00
Nitrate
NO 3 226 3.65
NO 3 - N 51
Phosphate
PO 4 2 0.06
P 1 mg/L dS/m
4.01
2.95 ppm
Adj Na Adsorption Ratio
Sodium Adsorption Ratio
Hardness
SARadj
TDS
ECw pHc pH
SAR
Hardness is determined from calculations using the calcium and magnesium concentrations in the water.
DISCLAIMER: The following water analysis interpretation should serve only as a guideline. It should not be used without considering crop type, soil chemistry, plant growth environment and water management practices. Consult a local or state soil and water specialist for a more thorough evaluation of your water’s quality.
Sample Id : Well Water
IRRIGATION WATER
17-177-0000Report No :
90937Lab Number :
2 of 2Page :
09402Cust No :
Date Printed :
Date Received :
Project :
Example A71 Send to :
WATER ANALYSIS INTERPRETATION, AGRICULTURAL
Chloride (Cl) 1
Sodium (Na) 1
Surface irrigation
Sprinkler irrigation 2
Fluoride (F)
Boron (B) 1
Degree of Restriction on Use
1. Crop tolerance to salinity, sodium, chloride, boron and fluoride varies widely. Most tree crops are sensitive to sodium and chloride while many annual crops are not. Soil conditions, irrigation method and climate must be considered.
2. Leaf burn from foliar and root absorption will be enhanced under conditions of : low humidity, high temperature and high air movement .
3. Elevated iron in combination with sulfides or tannins can result in bacterial slimes that can clog drip systems. Removal of iron and manganese often involves oxidation ( aeration or chlorination ) followed by filtering.
4. Positive pH - pHc ( saturation index ) values indicate the potential for calcium and magnesium carbonate precipitates that might impair efficiency of irrigation systems with small orificed parts and/or may leave unsightly lime deposits on leaves. Problems can be reduced by mineral acid addition.
5. Infiltration problems are most likely when water with low ECw and/or high SAR adj. is used on mineral soils containing some silt and clay.
Evaluation of infiltration problems should include analysis of both irrigation water and soil-water extracts. Treatment may involve injecting gypsum into the water or applying gypsum to the soil surface.
6. Bicarbonate when excessive may result in difficulty in controlling soil pH and may impair root assimilation of minor elements.
7. Sulfur, magnesium and /or boron may become limiting if not supplied by soil or fertilizer. Use soil and leaf analysis to confirm need.
Sulfate
Magnesium
Boron
Specific Ion Toxicity
Salinity
Potential Problem
Alkalinity
Potential Low Nutrient Issues (Soilless media)
Slight to Moderate
Graphical Results
SevereSlight to ModerateNone
CriteriaTest Result
Units
Sprinkler irrigation 2 4.01
Surface irrigation 10.39
10.53
SARadj meq/L meq/L
10.39meq/L
0.65mg/L
0.40mg/L mg/L mg/L mg/L
> 9< 3 3 - 9
3 - 6< 3
< 4 4 - 10
< 3 3 - 5
< 0.7 0.7 - 3
1 - 5< 1
> 48 48 - 20
> 10 10 - 4
> 0.3 0.3 - 0.050.40
None Severe
> 6
> 10
> 5
> 3
> 5
< 20
< 4
< 0.05
( Ratio based on adjSAR / ECw )
1.35 < 4 4 - 10 > 10 69
Clogging of Drip Systems or Unsightly Residues
Iron (Fe)3
Manganese (Mn) 3 mg/L mg/L
0.19
0.01
< 0.3 0.3 - 1.5 > 1.5
> 1.50.2 - 1.5< 0.2
Reduced Water Infiltration 5 pH - pHc4 0.08 <= 0 > 0 390
Bicarbonate (HCO ) + Carbonate (CO )
< 2 2 - 8.5 > 8.5 664
2.96 < 0.7 0.7 - 3 > 3 625ECw dS/m
3 3 meq/L 9.16
Comments :
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