SRP 1,4-Dioxane COMPASS GW All Results in New Jersey

This GIS layer is based on a SQL query of the groundwater HAZSITE data that resides in COMPASS for each active Site Remediation case. Once the raw groundwater HAZSITE data is extracted from COMPASS, it is summarized such that a maximum concentration for the contaminant is derived for the year preceeding the last sampling event (samp_last_max_conc) and a maximum concentration is also generated for all sampling events (all_max_conc) . Each active Site Remediation case is included in the GIS layer. The GIS layer symbology is based on the the maximum concentration for the year preceeding the last sampling event for that contaminant as summarized in the evaluation field and further categorized in the s_value field. Symbology is represented as follows: no data submitted, not sampled, non-detect (ND), detected below standard, reporting limit > standard, 1 - 10 times the standard, 10 - 100 times the standard, 100 - 1000 times the standard and greater than 1000 times the standard. The standard is the NJDEP Ground Water Quality Standard and/or MCL for this contaminant. For the HAZSITE data, there are a number of considerations that need to be taken into account when using this GIS layer for decision making purposes:- Not all SRP cases have provided HAZSITE data to the Department or HAZSITE data that has been provided to the Department may be incomplete;- Additional sampling may have been conducted since the last round of HAZSITE data was submitted that has not yet been provided as HAZSITE data is only required with key document submittals;- HAZSITE data that was submitted may not have been provided in the correct format and therefore could not be uploaded into the COMPASS data repository and would therefore not be returned via the COMPASS SQL query.地理信息系统（GIS）图层基于针对COMPASS系统中存储的各活跃场地修复案例的地下水HAZSITE数据执行的SQL查询构建。从COMPASS中提取原始地下水HAZSITE数据后，将对其进行汇总处理：针对各污染物，计算其距上次采样事件前一年的最大浓度（samp_last_max_conc），同时生成所有采样事件中的最大浓度（all_max_conc）。所有活跃场地修复案例均被纳入本GIS图层。 本GIS图层的符号系统基于评估字段（evaluation field）中汇总的、对应污染物距上次采样事件前一年的最大浓度，并通过s_value字段进一步分类。符号系统的分类如下：未提交数据、未采样、未检出（non-detect，ND）、检出浓度低于标准值、报告限值高于标准值、标准值的1~10倍、标准值的10~100倍、标准值的100~1000倍，以及高于标准值1000倍的情形。 上述标准值为本污染物对应的新泽西州环境保护部（NJDEP）地下水水质标准及/或最大污染物浓度限值（Maximum Contaminant Level，MCL）。 在使用本GIS图层进行决策时，针对HAZSITE数据需注意以下事项： - 并非所有场地修复项目（Site Remediation Project，SRP）均已向主管部门提交HAZSITE数据，且已提交的数据可能存在不完整的情况； - 自上一轮HAZSITE数据提交以来，可能已开展额外采样工作，但此类数据尚未提交——HAZSITE数据仅需随关键文件提交时一并提供； - 已提交的HAZSITE数据可能存在格式不符合要求的情况，因此无法上传至COMPASS数据仓库，进而无法通过COMPASS的SQL查询获取此类数据。