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r <br />^, ' CORRRELAT10tV OF PENETRATION RESISTANCE <br /> � WITH RELATIVE DENSITY AND CONSISTENCY � <br />'' NO. OF BLOWS (N) RELATIVE DENSITY PARTICLE SIZE DISTRIBUTION <br /> , 0-4 Very loose Boulders Over 12" <br /> 5-10 Loose Cobbles 3" - 12" <br />� SANDS I1-30 Medium dense Gravel Coarse 3/4" - 3" <br /> 31-50 Dense <br /> Over 50 Very dense Fine �4 - 3/4" <br /> CONSISTENCY Sand Coarse �4 - �10 <br /> SILTS 0-4 Very soft Medium :�10 - #40 <br /> & 5-8 Soft Fine �40 - #200 <br /> CLAYS 9-15 Firm Silt & clay -#200 Based on ptasticity <br /> , 16-30 Hard . <br /> Over 30 Very hard <br /> KEY TO DRILLING SYMBOLS <br /> � � SB - Split spoo�r sampler � HSA - Hollow stem auger 1 i�ater level <br /> , 3T - 3" Thin wall � FA - Fligh� auger � NSR - No sample recovered <br /> KEY TO SOIL CLASSIFICATION <br /> �GM - Silty gravel �CH - High plasticict� clay <br />� <br /> �GC - Clayey gravel �OL - Low plasticity orgairic soil <br /> � GP - Poorly graded gravel �OH - High plasticity organic soil <br /> � <br /> �Fill �I PT - S►vamp deposits <br /> aSP - Poorly graded sa�rd �SP-SM - Typ1CQI dlLQI CIQSSl�1CQ110j1 <br /> �SM - Sil�y sa,rd �Limes�o�re bedrock� <br />. �SC - Clapey sa�:d �Shale bedrock <br /> �ML - Lotiv plastici[i� sili �Smrdstone bedrock <br /> MH - High plasticit}� sil[ � ��Grmtltic or »t�lantorpJric bedrock , <br />„ � � I <br />. � • <br /> �CL - Low plastici[y clai� . <br />