11-17-2025 - Agenda Packet Planning Commission - Full Packet

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BORING LOG NOTES DRILLING AND SAMPLING SYMBOLS Symbol Definition AR: Sample of material obtained from cuttings blown out the top of the borehole during air rotary procedure. B, H, N: Size of flush joint casing CAS: Pipe casing, number indicates nominal diameter in inches COT: Clean -out tube DC: Drive casing; number indicates diameter in inches DM: Drilling mud or bentonite slurry DR: Driller (initials) DS: Disturbed sample from auger flights DP: Direct push drilling; a 2.125 inch OD outer casing with an inner 1'/2 inch ID plastic tube is driven continuously into the ground. FA: Flight auger; number indicates outside diameter in inches HA: Hand auger; number indicates outside diameter HSA: Hollow stem auger; number indicates inside diameter in inches LG: Field logger (initials) MC: Column used to describe moisture condition of samples and for the ground water level symbols N (BPF): Standard penetration resistance (N-value) in blows per foot (see notes) NQ: NQ wireline core barrel PQ: PQ wireline core barrel RDA: Rotary drilling with compressed air and roller or drag bit. RDF: Rotary drilling with drilling fluid and roller or drag bit REC: In split -spoon (see notes), direct push and thin -walled tube sampling, the recovered length (in inches) of sample. In rock coring, the length of core recovered (expressed as percent of the total core run). Zero indicates no sample recovered. SS: Standard split -spoon sampler (steel; 1.5" is inside diameter; 2" outside diameter); unless indicated otherwise SU Spin -up sample from hollow stem auger TW: Thin -walled tube; number indicates inside diameter in inches WASH: Sample of material obtained by screening returning rotary drilling fluid or by which has collected inside the borehole after "falling" through drilling fluid WH: Sampler advanced by static weight of drill rod and hammer WR: Sampler advanced by static weight of drill rod 94mm: 94 millimeter wireline core barrel V :: Water level directly measured in boring 0: Estimated water level based solely on sample appearance TEST SYMBOLS Symbol Definition CONS: One-dimensional consolidation test DEN: Dry density, pcf DST: Direct shear test E: Pressuremeter Modulus, tsf HYD: Hydrometer analysis LL: Liquid Limit, % LP: Pressuremeter Limit Pressure, tsf OC: Organic Content, % PERM: Coefficient of permeability (K) test; F - Field; L - Laboratory PL: Plastic Limit, % qp: Pocket Penetrometer strength, tsf (approximate) q,: Static cone bearing pressure, tsf q,,: Unconfined compressive strength, psf R: Electrical Resistivity, ohm-cros RQD: Rock Quality Designation of Rock Core, in percent (aggregate length of core pieces 4" or more in length as a percent of total core run) SA: Sieve analysis TRX: Triaxial compression test VSR: Vane shear strength, remolded (field), psf VSU: Vane shear strength, undisturbed (field), psf WC: Water content, as percent of dry weight %-200: Percent of material finer than 4200 sieve STANDARD PENETRATION TEST NOTES (Calibrated Hammer Weight) The standard penetration test consists of driving a split -spoon sampler with a drop hammer (calibrated weight varies to provide N60 values) and counting the number of blows applied in each of three 6" increments of penetration. If the sampler is driven less than 18" (usually in highly resistant material), permitted in ASTM: D1586, the blows for each complete 6" increment and for each partial increment is on the boring log. For partial increments, the number of blows is shown to the nearest 0. F below the slash. The length of sample recovered, as shown on the "REC" column, may be greater than the distance indicated in the N column. The disparity is because the N-value is recorded below the initial 6" set (unless partial penetration defined in ASTM: D1586 is encountered) whereas the length of sample recovered is for the entire sampler drive (which may even extend more than 18"). 01REP052C (7/11) AMERICAN ENGINEERING TESTING, INC. 128