(a).

Sites	Compounds	Benzene	Ethyl acetate	MIBK	Toluene	m, p-Xylenes	Styrene
YI	Ethyl acetate	0.053
	MIBK	0.317∗	0.059
	Toluene	0.545∗	0.070	0.581∗
	m, p-Xylenes	0.532∗	0.155∗	0.753∗	0.692∗
	Styrene	0.278∗	0.051	0.267∗	0.408∗	0.396∗
	o-Xylene	0.410∗	0.084	0.773∗	0.644∗	0.857∗	0.430∗
YR	Ethyl acetate	0.262∗
	MIBK	0.114	0.402∗
	Toluene	0.278∗	0.178∗	0.284∗
	m, p-Xylenes	0.380∗	0.601∗	0.475∗	0.212∗
	Styrene	0.367∗	0.256∗	0.329∗	0.425∗	0.302∗
	o-Xylene	0.385∗	0.644∗	0.445∗	0.269∗	0.949∗	0.349∗
GI	Ethyl acetate	0.027
	MIBK	−0.016	0.220∗
	Toluene	0.413∗	0.187∗	0.391∗
	m, p-Xylenes	0.032	−0.031	0.300∗	0.638∗
	Styrene	−0.006	−0.011	0.327∗	0.450∗	0.454∗
	o-Xylene	0.027	−0.028	0.293∗	0.646∗	0.986∗	0.458∗
GR	Ethyl acetate	0.201∗
	MIBK	0.143∗	0.285∗
	Toluene	0.416∗	0.490∗	0.343∗
	m, p-Xylenes	0.466∗	0.449∗	0.329∗	0.677∗
	Styrene	0.159∗	0.011	−0.019	0.219∗	0.224∗
	o-Xylene	0.473∗	0.466∗	0.288∗	0.651∗	0.953∗	0.192∗
SC	Ethyl acetate	0.271∗
	MIBK	0.159∗	0.193∗
	Toluene	0.645∗	0.217∗	0.230∗
	m, p-Xylenes	0.500∗	0.256∗	0.131∗	0.735∗
	Styrene	0.158∗	0.024	0.706∗	0.241∗	0.117
	o-Xylene	0.511∗	0.310∗	0.190∗	0.718∗	0.978∗	0.151∗

*Correlation coefficients are significant at a level of 0.05.