This work is based on the occupational hazards experienced by some artisans working in Abeokuta, Ogun State, Nigeria. By virtue of their respective trades they were too exposed to the hazards of the specific element (metal) of their trades. In this study, specimen of blood or urine was taken as sample from each volunteer. The experimental units (volunteers) are Artisans within the Abeokuta metropolis. Data was collected on the quantities of Lead (Pb), Calcium (Ca), Sodium (Na), Potassium (K) etc. in the blood or urine samples of volunteers. The Artisans are in seven categories, with respect to their trades, samples from two categories (non-artisans) of individuals (Petrol Attendants and Spare-parts sellers) were also considered because of the closeness of their workplaces to the shops of the Artisans. To determine their respective degrees of susceptibility (vulnerability), critical points will be needed and are hereby identified using Quality Control Methods (QCM). Usually between the Control Level Point (CLP) and the tolerance, there are some readings of susceptible (S) subjects with varying degrees of susceptibility. Also presented are simple summary statistics for each of the artisan groups followed by some pair-wise, comparisons and correlation coefficients calculations, of the data.