Total Petroleum Hydrocarbon Fractions

无论你是购买或租赁财产啊r addressing a petroleum hydrocarbon release at your current property, you should run a Total Petroleum Hydrocarbon (TPH) test to determine the levels of gasoline, diesel, and oil in your soil and groundwater.

Total Petroleum Hydrocarbons (TPH) are the measurable amounts of petroleum-based chemical compounds typically found in gasoline, diesel and oil range organics. To ensure the measurable amount of these compounds meet the Louisiana Department of Environmental Quality (LDEQ) requirements, experts at Element's US-based environmental laboratories run two types of tests: TPH Mixtures testing via EPA SW 846 Method 8015, and TPH Fractions testing via the MA Method.

TPH混合物测试

自2003年成立以来，LDEQ风险评估纠正措施计划（RECAP）已经认识到并允许使用通过EPA SW 846方法8015进行总石油烃混合物测试，用于汽油，柴油和油射流器有机物。TPH通过8015方法提供了一种结合混合物的芳族和脂族测量的块状结果。虽然TPH到8015被认为是最经济的方法和程序更快，但TPH混合物的调节限制更为保守，因为它不提供特定的基于风险的脂肪族和芳香数据。

TPH分数测试

If the TPH mixture results do not bring closure to a site, the MA Method Volatile Petroleum Hydrocarbons (VPH) or Extractable Petroleum Hydrocarbons (EPH) method may be used to “Fractionate” the hydrocarbon concentrations present into Aliphatic and Aromatic groups. The MA Method VPH is an appropriate fractionation test when dealing with gasoline, and the MA Method EPH is an appropriate fractionation test when dealing with oil and diesel.

使用TPH级分允许将烃浓度分为脂族和芳族基团，然后在几个碳范围内分散，每个碳系列具有特定的基于风险的限制。当考虑浓度水平时，芳族基团更具毒性并且具有较低的限制，而脂族基团毒性较小并且具有更高的限制。如果网站恰好具有TPH混合数据和TPH分级数据，则应使用更具体的分馏数据来确定纠正措施。

CO.nsistent with RECAP, both TPH mixtures and TPH fractions have limits for Soil non-industrial (SOIL_SSn), Soil industrial (SOIL_SSi), Soil protective of groundwater (SOIL_SSGW ) and groundwater (GW_SS). LDEQ RECAP Screening Option Limits are tabled below to demonstrate how TPH Fractions are measured and can help bring faster and more cost-effective closure to your site:

TPH-G或VPH

TPH-D.TPH-O., EPH

Analyte	肮脏（mg / kg）	SOIL_SSi (mg/kg)	肮脏的土壤（Mg / kg）	gw_ss.
TPH-D.	65.	510.	65.	0.15
TPH-O.	180.	2,500	10,000	0.15
EPH aliphatics> C10-C12	230.	2,000	10,000	0.15
EPH Aliphatics >C12-C16	370.	3,800	10,000	0.15
EPH Aliphatics >C16-C35	7,100	10,000	10,000	7.3
EPH Aromatics >C10-C12	120.	1,100	100	0.15
EPH芳烃> C12-C16	180.	2,100	200	0.15
EPH芳烃> C16-C21	150.	1,700.	2,100	0.15
EPH芳烃> C21-C35	180.	2,500	10,000	0.15

When working with a consultant company to submit samples for fractionation, it’s important to follow the guidelines below:

VPH容器，保存和保持时间

矩阵	容器	保存	持有时间
Aqueous Samples	2 40ml VOA瓶，零顶空	pH> 2通过HCl 很酷> 6.O.C但不冷冻	14天
土壤/沉积物	EPA 5035通过2个ENCORE设备	很酷> 6.O.C但不冷冻	48小时挤出挤出然后从收集日期到28天进行分析
土壤/沉积物	EPA 5035通过Terracores，As 2-40ml瓶	用甲醇保存的小瓶，1：1比甲醇与样品 很酷> 6.O.C但不冷冻	收集日期起28天

EPH Containers, Preservation, and Hold Times

矩阵	容器	保存	持有时间
Aqueous	1升琥珀玻璃瓶或元素的2-40ml琥珀色小瓶	pH> 2通过HCl 很酷>6.O.C但不冷冻	14天to extraction with extracts analyzed within 40 days
土壤/沉积物	4 oz amber glass jar	很酷> 6.O.C但不冷冻	14天to extraction with extracts analyzed within 40 days
土壤/沉积物	4 oz amber glass jar filled to 2/3 capacity	冻结在-10O.C在现场或实验室*	在40天内分析的提取物的摘录后14天内提取样品

*在实验室中加工的样品必须保留在> 6.^O.Cand frozen within 48 hours of sample collection. Properly frozen soil samples for EPH may be held for up to one year prior to analysis and must be extracted within 24 hours of thawing.

Expertise when, and where you need it

元素has an in-depth understanding of both TPH Mixtures and TPH Fractions testing approaches and can cost-effectively perform these procedures allowing for direct comparison of results to the appropriate LDEQ screening standard.

讨论如何使用TPH分数可以帮助您对您的网站进行成本效益的关闭，并在多媒体环境测试计划上获取其他有用的指导，contact our experts today.