# Sand: A Critical Component for Beach Volleyball Courts
## 4 Results
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline  & & \multicolumn{6}{c}{**FIVB [\(\mu\)m]**} \\ \hline  & **Silt and** & **Very Fine** & **Fine** & **Medium and** & **Very Coarse** & **Fine** & **Gravel** \\  & **Clay** & **Sand** & **Sand** & **Coarse Sand** & **Sand** & **Gravel** & **Gravel** \\ \hline  & & **<50** & **50–150** & **150–250** & **250–1000** & **1000–2000** & **2000–3350** & **>3350** \\ \hline  & & & \multicolumn{6}{c}{**FIVB Standard [\%]**} \\ \hline  & & **<0.15** & **<2.0** & **7 to 18** & **80 to 92** & **<6** & **0** & **0** \\ \hline
**ID** & **Name** & & & \multicolumn{6}{c}{**Weight [\%]**} \\ \hline
1 & Skowroni Park & 0.14 & 3.30 & 13.14 & 79.55 & 3.52 & 0.34 & 0.00 \\ \hline
2 & KS AZS Wratislavia & 0.23 & 9.53 & 15.60 & 67.42 & 4.67 & 0.77 & 1.78 \\ \hline
3 & Wroclaw University of Science & & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \\ and Technology & 0.19 & 3.49 & 11.82 & 71.73 & 7.48 & 2.96 & 2.34 \\ \hline
4 & Wroclaw University of Health & & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \\ and Sport Sciences & 0.12 & 4.87 & 13.82 & 80.81 & 0.33 & 0.01 & 0.05 \\ \hline
5 & ‘Morskie Oko’ swimming & & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \\ facility & 0.31 & 5.82 & 13.31 & **73.72** & 5.21 & 1.27 & 0.37 \\ \hline
6 & GEM Sports Complex & 0.23 & 1.94 & **5.92** & 82.88 & 6.68 & 0.85 & 1.51 \\ \hline
7 & Millennium Park & 0.15 & 7.08 & 17.14 & **72.51** & 2.82 & 0.30 & 0.00 \\ \hline
8 & LGW Arena & 0.21 & **5.44** & 13.60 & **72.10** & 6.08 & 2.03 & 0.54 \\ \hline
9 & ‘Clinianki’ swimming facility & 0.11 & 0.42 & **1.54** & 90.73 & 6.52 & 0.49 & 0.19 \\ \hline
10 & Primary School No. 95 & 0.23 & 5.16 & 17.32 & **72.70** & 3.83 & 0.76 & 0.00 \\ \hline
11 & K6\(\theta\) (hall) & 0.01 & 0.13 & **2.57** & 90.13 & 5.92 & 1.14 & 0.10 \\ \hline
12 & Olympic Preparation Centre & & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & \multicolumn{1}{c}{} & & \\ in Spala (hall) & 0.00 & **2.42** & 20.30 & 77.21 & 0.02 & 0.05 & 0.00 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Conformity of samples with FIVB grain size standards [7]. Green—standard complied; orange—standard exceeded by no more than 0.1%; red—standard exceeded by more than 0.1%. The 0.1% error is marked because an error of this magnitude can come from grains stopping within the mesh of the sieve. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & **Site** & **pH** & **CaCO3 [\%]** & **Fe [\%]** & **Organic** \\
**ID** & **Name** & & & **Matter [\%]** & **(USBR) [m/d]** \\ \hline
1 & Skowroni Park & 8.22 & 3.16 & 0.15 & 0.005 & 8.4 \\ \hline
2 & KS AZS Wratislavia & 5.14 & 0 & 0.06 & 0.011 & 5.2 \\ \hline
3 & Wroclaw University of Science and Technology & 7.64 & 0.12 & 0.07 & 0.012 & 10.1 \\ \hline
4 & Wroclaw University of Health and Sport Sciences & 5.42 & 0 & 0.03 & 0.008 & 8.3 \\ \hline
5 & ‘Morskie Oko’ swimming facility & 7.24 & 0 & 0.08 & 0.016 & _7.7_ \\ \hline
6 & GEM Sports Complex & 7.74 & 0.072 & 0.14 & 0.019 & 15.7 \\ \hline
7 & Millennium Park & 5.61 & 0 & 0.06 & 0.009 & 6.3 \\ \hline
8 & LGW Arena & 8.23 & 2.56 & 0.15 & 0.017 & 8.0 \\ \hline
9 & ‘Clinianki’ swimming facility & 6.57 & 0 & 0.16 & 0.027 & 20.3 \\ \hline
10 & Primary School No. 95 & 8.38 & 3.32 & 0.17 & 0.013 & 8.1 \\ \hline
11 & K69 (hall) & 7.19 & 0 & 0.13 & 0.025 & 19.6 \\ \hline
12 & Olympic Preparation Centre in Spala (hall) & 8.65 & 0.08 & 0.02 & 0.006 & 6.6 \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Chemical properties and permeability of samples. We received 49 valid responses from respondents. Due to the low sample size, responses are not statistically significant and may not be representative. The game quality surveys conducted showed variation in the characteristics of the individual courts (Figure 7). The relation between courts allowing dynamic play and high satisfaction from the game is well visible.