Hazardous Waste Manifest Data (CT) 1984 – 2008

NOTES:
1. Please use this link to leave the data view to see the full description: https://data.ct.gov/Environment-and-Natural-Resources/Hazardous-Waste-Manifest-Data-CT-1984-2008/h6d8-qiar
2. Please Use ALL CAPS when searching using the "Filter" function on text such as: LITCHFIELD. But not needed for the upper right corner "Find in this Dataset" search where for example "Litchfield" can be used.

Dataset Description:
We know there are errors in the data although we strive to minimize them. Examples include:
• Manifests completed incorrectly by the generator or the transporter - data was entered based on the incorrect information. We can only enter the information we receive.
• Data entry errors – we now have QA/QC procedures in place to prevent or catch and fix a lot of these.
• Historically there are multiple records of the same generator. Each variation in spelling in name or address generated a separate handler record. We have worked to minimize these but many remain. The good news is that as long as they all have the same EPA ID they will all show up in your search results.
• Handlers provide erroneous data to obtain an EPA ID - data entry was based on erroneous information. Examples include incorrect or bogus addresses and names. There are also a lot of MISSPELLED NAMES AND ADDRESSES!
• Missing manifests – Not every required manifest gets submitted to DEEP. Also, of the more than 100,000 paper manifests we receive each year, some were incorrectly handled and never entered.
• Missing data – we know that the records for approximately 25 boxes of manifests, mostly prior to 1985 were lost from the database in the 1980’s.
• Translation errors – the data has been migrated to newer data platforms numerous times, and each time there have been errors and data losses.
• Wastes incorrectly entered – mostly due to complex names that were difficult to spell, or typos in quantities or units of measure.

Since Summer 2019, scanned images of manifest hardcopies may be viewed at the DEEP Document Online Search Portal: https://filings.deep.ct.gov/DEEPDocumentSearchPortal/

注意事项：
1. 请通过该链接跳转至数据查看页面以获取完整描述：https://data.ct.gov/Environment-and-Natural-Resources/Hazardous-Waste-Manifest-Data-CT-1984-2008/h6d8-qiar
2. 使用文本筛选功能（如筛选"LITCHFIELD"）时，请全部大写输入；但数据集右上角的"在此数据集中搜索"功能无需此要求，例如可直接输入"Litchfield"。

数据集说明：
尽管我们已尽全力将数据错误降至最低，但本数据集仍存在各类误差，具体示例如下：
• 危废产生方或运输方填写的危险废物转移联单（Hazardous Waste Manifest）存在错误——系统将按照所接收的错误信息进行录入，我们仅能如实录入所收到的内容。
• 数据录入错误——目前我们已建立质量保证与质量控制（QA/QC）流程，以防范、拦截并修正此类问题。
• 历史数据中存在同一危废产生方的多条重复记录：名称或地址的任一拼写变体均会生成独立的危废经办人记录。我们已尽力减少此类情况，但仍有大量遗留问题。值得庆幸的是，只要这些记录拥有相同的美国环境保护署标识符（EPA ID），搜索时即可匹配到全部相关条目。
• 危废经办人为获取EPA ID而提供虚假数据——系统将基于错误或虚假信息完成录入，例如不实的地址与名称，此外还存在大量拼写错误的名称与地址！
• 缺漏危险废物转移联单——并非所有按要求需报送的转移联单都会提交至康涅狄格州能源与环境保护部（DEEP）。此外，我们每年接收的逾10万份纸质转移联单中，部分因处理不当从未被录入系统。
• 数据缺失——已知约25箱转移联单的相关记录在20世纪80年代的数据库迁移中丢失，此类记录大多为1985年之前的数据。
• 迁移误差——本数据集已多次迁移至新的数据平台，每次迁移均伴随错误与数据丢失情况。
• 废物信息录入错误——此类错误多源于复杂的废物名称难以准确拼写，或是数量、计量单位录入存在笔误。

自2019年夏季起，公众可通过DEEP文件在线搜索门户查看危险废物转移联单纸质件的扫描图像：https://filings.deep.ct.gov/DEEPDocumentSearchPortal/