Appendix A – Boring Log Template

benesch

Appendix A · Subsurface Exploration RecordBoring Log

Boring No.B-1

ProjectExample Siding Extension — Embankment Widening	Benesch project no.000000.00	Client railroad[Railroad]	Subdivision / MP[Sub.] MP 000.0
Station / offsetSta. 00+00, 25 ft Lt. of CL main	Latitude / longitude00.00000° / −00.00000°	Ground surface elev. (ft)745.0 (NAVD 88)	Total depth (ft)25.0
Drilling contractor[Contractor]	Rig / methodTrack-mounted rig / 3¼-in. HSA; NX core	HammerAutomatic, 140 lb, 30 in. drop	Energy ratio (ER)55% (calibrated)
Date started / completed__/__/____ / __/__/____	Logged by[Name], [Title]	Checked by[Name], P.E.	Weather[Conditions]

Subsurface profile EXAMPLE ENTRIES

Elev.ft	Depthft	Graphic log	Sample			SPT (ASTM D1586)		Material descriptionConsistency/density, color, moisture, SOIL NAME (USCS), other; geologic unit	Index tests			Remarks / lab tests
Elev.ft	Depthft	Graphic log	No.	Type	Rec.in.	Blows / 6 in.	N₆₀ 01020304050		w%	LL/PI	−200%	Remarks / lab tests
745.0	0–2.5							FILL — Silty SAND (SM), brown, moist; ballast fragments and cinders in upper 1 ft
742.5	2.5–4		SS-1	SS	14	2-3-3	5.5	Loose, brown, moist, silty fine SAND with gravel (SM) — fill	12.4			w
740.0	5–6.5		SS-2	SS	16	3-4-4	7.4	Medium dense, brown, moist, silty fine SAND (SM)	10.8			w
737.5	7.5–9		SS-3	SS	18	2-2-2	3.7	ALLUVIUM — Soft, gray, wet, lean CLAY (CL)	24.1	42/22	82	w, LL, PL, −200
735.0	10–12		ST-1	ST	22	push		Soft, dark gray, wet, fat CLAY (CH); LL = 68, PL = 28	38.5	68/40	92	Consol. (D2435), UU (D2850), γ_d = 78.2 pcf
732.5	12.5–14		SS-4	SS	18	1-1-2	2.8	Very soft, dark gray, wet, fat CLAY (CH)	42.1			w
730.0	15–16.5		SS-5	SS	16	1-2-2	3.7	Soft to firm, gray, wet, fat CLAY (CH)	36.8			w
727.5	17.5–19		SS-6	SS	15	3-4-4	7.4	RESIDUUM — Medium dense, red-brown, moist, clayey SAND (SC)	9.2			w
725.0	20–21.5		SS-7	SS	17	6-8-10	16.6	Dense, red-brown, moist, clayey SAND (SC)	8.1			w
723.0	22–25		RC-1	NX	REC 94% RQD 78%	50/3″		BEDROCK — Greenstone, hard, slightly weathered, gray-green; joints moderately close, rough, iron-stained. Auger refusal at 22.0 ft; cored 22.0–25.0 ft				Point load (D5731)
Boring terminated at 25.0 ft in bedrock · Backfilled with bentonite-cement grout

Groundwater observations

▽ Encountered during drilling	8.0 ft (El. 737.0)	▼ At completion of drilling	7.2 ft (El. 737.8)
▼ Stabilized (24 hr after completion)	6.8 ft (El. 738.2)	Date / method	__/__/____ · tape in open hole

Graphic log legend (after ASTM D2488)

Fill

Gravel (GW/GP)

Clean sand (SW/SP)

Silty sand (SM)

Clayey sand (SC)

Silt (ML/MH)

Lean clay (CL)

Fat clay (CH)

Peat / organic (Pt, OL/OH)

Bedrock

Sample and test key

SS · Split-spoon sample (ASTM D1586)	ST · Shelby tube (ASTM D1587)	NX / HX · Rock core bit size
N · Blows for last 12 in. of 18-in. drive	N₆₀ = N × ER/60 (ER = hammer energy ratio, %)	50/3″ · 50 blows for 3 in. penetration (refusal)
REC · Core recovery; RQD per ASTM D6032	w · Moisture (D2216); LL/PI (D4318); −200 (D1140)	Consol. (D2435); UU (D2850); PLT (D5731)

Notes

Stratification lines are approximate; transitions between soil types may be gradual.
Soil descriptions are based on visual-manual classification (ASTM D2488), revised where laboratory results are available (ASTM D2487).
Groundwater levels are for the date(s) shown and will vary with season, rainfall and drainage.
This log is not complete without the accompanying geotechnical report and should not be used separately from it.

Logged by

Checked by

Approved by (P.E.) / license no. / state

P.E. SEAL

Boring B-1 · Appendix A — Boring Log TemplateAlfred Benesch & Company · Geotechnical EngineeringSheet ___ of ___