IDENTIFIERS

  • Current Taxon Name (Soil Name): PLEASANTON
  • OSD
  • Series Extent
  • User Site ID: S1960CA001002
  • User Pedon ID: S1960CA001002
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 40A2877
  • NCSS Pedon Lab Data NASIS Record ID - 37456
  • Print Date: 4/24/2025

    • LOCATION

  • Location In Web Soil Survey
  • AOI is roughly a square mile and pedon is marked in the center.
  • Location in SoilWeb
  • Location in Google Maps
  • Std. Latitude: 37.6555557
  • Std. Longitude: -121.7491684
  • Datum: WGS84
  • Township: 3S
  • Range: 2E
  • Section: 22
  • PLSS Details: SW1/4 of the NW1/4 of the SW1/4
  • Location Description: about 2 miles southeast of the center of Livermore.
  • State: California
  • County: CA001—Alameda
  • MLRA: 14—Central California Coastal Valleys
  • Non-MLRA Soil Survey Area: CA609—Alameda Area, California

    • PEDON

  • Describers Name: L. E. Welch.
  • Current Taxonomic Class: Fine-loamy, mixed, thermic Mollic Haploxeralfs
  • Current Taxon Kind: series
  • Pedon Type: taxadjunct to the series
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 2
  • Correlated Information:
  • Soil Name - PLEASANTON
  • PSC - 25 to 102 cm.
  • Classificaton Date - 7/16/2007
  • Moisture Class - xeric
  • Sampled As Information:
  • Soil Name - Pleasanton
  • Classificaton Date - 8/5/1960
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landform: terrace
  • Slope Shape Down: convex
  • Runoff: medium
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 8/5/1960 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Setting and Climate
    Slope Slope Length USLE Upslope Length Elev. Corr. Elev Aspect MAP REAP FFD MAAT MSAT MWAT MAST MSST MWST MFFP PE Index Climate Station ID Climate Station Name Climate Station Type
    % m degrees mm mm C mm

    1

    —

    —

    180

    —

    270

    —

    —

    —

    —

    —

    —

    —

    —

    —

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    —

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    A1p—0 to 15 centimeters (0.0 to 5.9 inches); grayish brown (10YR 5/2), very dark grayish brown (10YR 3/2), moist; gravelly loam; massive; hard when dry, friable, slightly sticky, slightly plastic; 3.0 medium roots and 21.0 fine roots and 0.5 coarse roots; 21.0 very fine and fine interstitial and 0.5 medium interstitial pores; fragments; slightly acid, pH 6.5, unspecified; gradual smooth boundary. Lab sample # 40A22685; dry when described;
    A12—15 to 43 centimeters (5.9 to 16.9 inches); grayish brown (10YR 5/2), very dark grayish brown (10YR 3/2), moist; gravelly loam; massive; hard when dry, friable, slightly sticky, slightly plastic; 21.0 very fine and fine roots and 0.5 medium roots; 21.0 very fine and fine interstitial and 3.0 medium interstitial pores; fragments; slightly acid, pH 6.5, unspecified; gradual smooth boundary. Lab sample # 40A22686; dry when described;
    B21—43 to 79 centimeters (16.9 to 31.1 inches); grayish brown (10YR 5/2), very dark grayish brown (10YR 3/2), moist; gravelly clay loam; weak medium subangular blocky structure; very hard, friable, moderately sticky, moderately plastic; 21.0 very fine and fine roots and 0.5 medium roots; 21.0 very fine and fine tubular and 3.0 medium tubular pores; 30 percent clay films on faces of peds and in pores; fragments; slightly acid, pH 6.5, unspecified; gradual smooth boundary. Lab sample # 40A22687; moist when described;
    B22—79 to 109 centimeters (31.1 to 42.9 inches); brown (10YR 4/3), dark brown (10YR 3/3), moist; gravelly clay loam; weak medium subangular blocky structure; very hard, friable, moderately sticky, moderately plastic; 21.0 very fine and fine roots; 21.0 very fine and fine tubular and 0.5 medium tubular pores; 30 percent clay films on faces of peds and in pores; fragments; neutral, pH 7.0, unspecified; gradual smooth boundary. Lab sample # 40A22688; moist when described;
    B3—109 to 155 centimeters (42.9 to 61.0 inches); brown (10YR 4/3), dark brown (10YR 3/3), moist; gravelly clay loam; weak medium angular blocky structure; very hard, friable, moderately sticky, moderately plastic; 0.5 very fine roots; 21.0 very fine and fine tubular and 0.5 medium tubular pores; 30 percent clay films on faces of peds and in pores; fragments; neutral, pH 7.0, unspecified; gradual smooth boundary. Lab sample # 40A22689; moist when described;
    C—155 centimeters (61.0 inches); yellowish brown (10YR 5/4), brown (10YR 4/3), moist; gravelly clay loam; massive parts to weak medium subangular blocky; very hard, friable, moderately sticky, moderately plastic; 21.0 very fine and fine tubular and 0.5 medium tubular pores; 30 percent clay films on faces of peds and in pores; fragments. Lab sample # 40A22690; moist when described;