examined 22 oil and grease pollutographs from small impervious highway sites to determine when a single grab sample
most closely approximates a flow-weighted composite sample.
Total sampling for the two study areas included 142 grab sample
stations and 106 video transects classified into four substrate classes (gravelly sand, sand, mud, and hypoxic mud) and two depth classes (< 10 m and > 10 m).
siliqua were obtained from hydraulic grab samples
at the same locations as photographs taken to count their burrows.
For CBO[D.sub.5] and TSS, respectively, more than a quarter and more than a half of samples from the treatment unit itself exceeded the Florida secondary-treatment grab sample
CM Zone: At least 2.5 kilometres long by 50 to 150 metres wide with grades up to 4.3% Cu (grab sample
A new zone of high-grade grab copper-silver mineralization has been discovered over 16 kilometres of strike at Tabalosos; At Tabalosos North West, grab samples
from six mineralized boulders (>0.1% copper) range in grade from 0.8% to 11.5% copper and 8 g/t silver to 28 g/t silver with an average grade of 4.2% copper and 17 g/t silver over a 5 kilometre strike: Tabalosos North West is located 3.5 kilometres immediately west of Tabalosos North East where grab samples
from sixteen mineralized boulders (>0.1% copper) ranged in grade from 0.1% to 8.3% copper and 0.2 g/t silver to 109 g/t silver with an average grade of 2.7% copper and 29 g/t silver East (Hannan News Release January 17, 2019) over a strike length of 9 kilometres.
Two grab samples
collected from a trench along the northern logging road returned 1.2% and 3.7% copper.
Even the worst grab sample
generated during the study was three to five times better than average septic effluent.
The initial grab sample
over this new vein returned 39.3 g/t gold.
As reported in the Company's news release BHS2019-08, a grab sample
from newly exposed outcrop 100 meters south of the historic 1989 Placer Dome anomalous gold and silver soil sampling grid, assayed 1 gram/ton gold and 45grams/ton silver.